Heavy concrete GOST 26633 technical specifications. Concrete is heavy and fine-grained. Requirements for concrete mixtures

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION
(MGS)

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION
(ISC)

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system. Basic Provisions” and GOST 1.2-2009 “Interstate Standardization System. Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption, application, updating and cancellation "

About the standard

1 DEVELOPED by the Research, Design and Technological Institute of Concrete and Reinforced Concrete. A. A. Gvozdeva (NIIZHB), a branch of OAO NITs Stroitelstvo

2 INTRODUCED by the Technical Committee for Standardization TC 465 "Construction"

3 ADOPTED by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Conformity Assessment in Construction (MNTKS) (Minutes of December 18, 2012 No. 41)

Short country name according to MK (ISO 3166) 004-97	Code of the country according to MK (ISO 3166) 004-97	Abbreviated name of the national authority state construction management
Azerbaijan		State Committee for Urban Planning and Architecture
Armenia		Ministry of Urban Development
Kazakhstan		Agency for Construction and Housing and Communal Services
Kyrgyzstan		Gosstroy
Moldova		Ministry of Construction and Regional Development
Russia		Ministry of Regional Development
Tajikistan		Agency for Construction and Architecture under the Government
Uzbekistan		Gosarchitektstroy

4 This standard takes into account the main provisions of the European regional standard EN 206-1:2000 Concrete - Part 1: Specification, performance, production and conformity (Concrete - Part 1: General technical requirements, performance, production and conformity criteria) in terms of requirements for concrete.

Translation from English (en).

Degree of conformity - non-equivalent (NEQ)

5 By order of the Federal Agency for Technical Regulation and Metrology dated December 27, 2012 No. 1975-st, the interstate standard GOST 26633-2012 was put into effect as the national standard of the Russian Federation from January 1, 2014.

Information about changes to this standard is published in the annual information index "National Standards", and the text of changes and amendments - in monthly information index "National Standards". In case of revision (replacement) or cancellation of this standard, a corresponding notice will be published in the monthly information index "National Standards". Relevant information, notification and texts are also posted in the public information system- on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

GOST 26633-2012

INTERSTATE STANDARD

HEAVY AND FINE GRAIN CONCRETE

Specifications

Heavy weight and sand concretes. Specifications

Introduction date - 2014-01 -01

1 area of use

This standard applies to heavy and fine-grained concretes with cement binders (hereinafter referred to as concretes) used in all areas of construction, and establishes technical requirements for concretes, rules for their acceptance, test methods.

The standard does not apply to large-porous, chemically resistant, heat-resistant and radiation-protective concretes.

2 Normative references

This standard uses normative references to the following interstate standards:

3.3.4 The technical requirements for concrete, established in accordance with, must be provided by the manufacturer of structures and products at the design age, which is indicated in the design documentation and assigned in accordance with the design standards, depending on the conditions of concrete hardening, construction methods and the timing of the actual loading of these structures and products. If the design age is not specified, the technical requirements for concrete must be provided at the age of 28 days.

The values of the normalized indicators of the tempering and transfer (for prestressed products) concrete strengths are set in the design of a specific product and are indicated in the standard or technical specifications for this product.

The normalized values of the strength of concrete of monolithic structures at an intermediate age (after removal of the supporting formwork, etc.) are established in the technological documentation (project for the production of works or technological regulations).

3.3.5 The total chloride content in concrete (in terms of Cl - ion) should not exceed:

1% by weight in non-reinforced concrete;

0.4% of the mass in concrete with non-stressed reinforcement;

0.1% by weight in prestressed concrete.

3.3.6 During the period of manufacture of products and structures, as well as the construction and operation of buildings and structures made of concrete, harmful substances should not be released into the external environment in quantities exceeding the current sanitary and hygienic standards,.

3.3.7 The minimum consumption of cement in concrete operated in non-aggressive environments, depending on the type of structures and their operating conditions, must correspond to that given in the table.

Type and consumption of cements, kg / m 3

PC-D0, PC-D5,
SSPC-D0,
CEM I

PC-D20,
SSPC-20,
CEM II

ShPTs, SSSHPTs,
CEM III, CEM IV,
CEM V

Unreinforced

Do not ration

XC4

Reinforced with non-tensioned reinforcement

XC4

Reinforced with prestressed reinforcement

XC4

3.3.8 For concrete structures operated in aggressive environments, the minimum consumption of cement and other boundary conditions for the composition of concrete should be taken in accordance with GOST 31384 and technical specifications, design and technological documentation for products and structures of a particular type.

3.4 Requirements for concrete mixtures

3.4.1 Concrete mixtures must comply with the requirements of GOST 7473.

3.4.2 The composition of concrete is selected according to GOST 27006.

3.4.3 The temperature of the concrete mixture at the time of delivery should not be lower than 5 °C.

3.5 Material requirements for concrete

3.5.1 Requirements for binders

3.5.1.1 As binders, cements should be used according to GOST 10178, GOST 22266, GOST 31108 and.

3.5.1.2 The type and class (grade) of cement should be selected in accordance with the purpose of structures and products, their operating conditions in accordance with GOST 31384, the required strength classes of concrete, frost resistance grades, water resistance and abrasion resistance, decorative properties based on the requirements of standards, specifications and design documentation for these structures and products.

3.5.2 Requirements for placeholders

3.5.2.1 Crushed stone and gravel from dense rocks according to GOST 8267, crushed stone from screenings from crushing dense rocks according to GOST 31424, crushed stone from blast-furnace and ferroalloy slags of ferrous metallurgy and nickel and copper-smelting slags of non-ferrous metallurgy according to GOST 5578 are used as large aggregates for concrete , as well as crushed stone from thermal power plant slag according to GOST 26644.

Coarse aggregates should have an average grain density of 2000 to 3000 kg/m 3 .

3.5.2.2 As fine aggregates for concrete, natural sand or sand from rock crushing screenings with a true density of 2000 to 2800 kg / m 3, their mixtures that meet the requirements of GOST 8736 or GOST 31424, sand from blast-furnace and ferroalloy slags of ferrous metallurgy are used and nickel and copper-smelting slags of non-ferrous metallurgy according to GOST 5578, as well as ash and slag mixtures according to GOST 25592, fly ash according to GOST 25818.

3.5.2.3 Coarse aggregate should be used in the form of separately dosed fractions in the preparation of concrete mix. The largest aggregate grain size should be set in the standards, specifications or working drawings of concrete and reinforced concrete structures and products.

Standard fractions of coarse aggregate, depending on the largest grain size, are given in the table.

The permissible content in aggregates of rocks and minerals classified as harmful impurities should not exceed the values \u200b\u200bgiven in the table.

Sulfur, sulfides, except for pyrite (marcasite, pyrrhotite, etc.), and sulfates (gypsum, anhydrite, etc.), in terms of SO 3 :

For coarse aggregate

1.5% mass

For fine aggregate

1.0% mass

Pyrite as SO 3

4.0% mass

Layered silicates (micas, hydromicas, chlorites, etc., which are rock-forming minerals):

For coarse aggregate

15% volume

For fine aggregate

2.0% mass

Magnetite, iron hydroxides (goethite, etc.), apatite, nepheline, phosphorite, which are rock-forming minerals:

Each one separately

10% volume

In total

15% volume

Halides (halite, sylvin, etc.) containing water-soluble chlorides, calculated as a chloride ion:

For coarse aggregate

0.10% mass

For fine aggregate

0.15% mass

Loose Asbestos Fiber

0.25% mass

Coal

1% mass

* The ability of fillers to react with alkalis should be determined by the expansion deformation when tested in accordance with GOST 8269.0.

3.5.2.8 Aggregates containing inclusions of harmful impurities exceeding the values given in c, as well as zeolite, graphite and oil shale can be used for concrete production only after testing in concrete in accordance with the requirements

3.5.2.9 For the use of crushed stone from sedimentary carbonate rocks of an aphanitic structure and igneous effusive rocks of a vitreous structure, they must be tested in concrete in accordance with.

3.5.2.10 Specific effective activity of natural radionuclides A eff in aggregates used for the preparation of concrete mixtures should not exceed the limit values depending on the area of application of concrete according to GOST 30108.

3.5.3 Requirements for additives and water

3.5.3.1 Chemical additives used in concrete must comply with the requirements of GOST 24211, as well as the standards and specifications for which they are produced.

3.5.3.2 The total amount of chemical additives should not exceed the maximum dosages specified by the manufacturer, and should not exceed 5% of the mass of cement.

3.5.3.3 Additives (except for air-entraining additives), used in an amount of less than 0.2% of the mass of cement, are introduced into the concrete mixture with mixing water.

3.5.3.4 Compatibility of admixtures with concrete components and among themselves shall be checked when selecting the concrete composition.

3.5.3.5 Water for mixing the concrete mixture and preparing solutions of chemical additives must comply with the requirements of GOST 23732.

4.2 Acceptance of concrete of prefabricated concrete and reinforced concrete products for all normalized quality indicators established by the project is carried out in accordance with GOST 13015 at the place of their manufacture.

4.3 Acceptance of concrete of monolithic structures is carried out according to all standardized quality indicators established by the project of buildings and structures and the project for the production of works or technological regulations at the construction site.

4.4 Acceptance of concrete for strength is carried out for each batch of prefabricated products and monolithic structures in accordance with GOST 18105.

4.5 Acceptance of concrete according to other normalized quality indicators (frost resistance, water resistance, abrasion, water absorption, etc.) is carried out when selecting a new nominal composition of concrete in accordance with GOST 27006, and then periodically in accordance with the technical specifications, design and technological documentation for products and structures of a particular type, as well as when changing the nominal composition of concrete, the technology of its manufacture and the quality of the materials used, but at least once every 6 months.

Periodic tests in terms of specific effective activity of natural radionuclides A eff in aggregates is carried out when selecting the composition of concrete, as well as when changing the quality of the materials used, but at least once a year.

If it is necessary to determine and control other normalized indicators of the quality of concrete (moisture content, shrinkage deformation, creep, endurance, heat generation, prismatic strength, modulus of elasticity, Poisson's ratio, protective properties of concrete in relation to steel reinforcement, etc.), their assessment is carried out in accordance with the requirements standards and specifications for concrete structures and products of specific types.

5 Control methods

5.1 The strength of concrete is determined according to GOST 10180, GOST 22783, GOST 28570, GOST 22690, GOST 17624.

The strength of concrete is controlled and evaluated according to GOST 18105.

5.2 The frost resistance of concrete is determined and evaluated according to GOST 10060.

5.3 The water resistance of concrete is determined and evaluated according to GOST 12730.5.

5.4 The average density of concrete is determined and evaluated according to GOST 12730.1 or GOST 17623.

5.5 The moisture content of concrete is determined and evaluated according to GOST 12730.2 or GOST 21718, or GOST 23422.

5.6 Water absorption of concrete is determined and evaluated according to GOST 12730.3.

5.7 Concrete porosity indicators are determined and evaluated according to GOST 12730.4.

5.8 Abrasion of concrete is determined and evaluated according to GOST 13087.

5.9 Prism strength, modulus of elasticity and Poisson's ratio of concrete are determined and evaluated according to GOST 24452.

5.10 Shrinkage and creep deformations of concrete are determined and evaluated according to GOST 24544.

5.11 The endurance of concrete is determined and evaluated according to GOST 24545.

5.12 The heat release of concrete is determined and evaluated according to GOST 24316.

5.13 The crack resistance characteristics of concrete are determined and evaluated according to GOST 29167.

5.14 The protective properties of concrete in relation to steel reinforcement are checked in accordance with GOST 31383.

5.15 The corrosion resistance of concrete is determined and evaluated according to GOST 27677.

5.16 Specific effective activity of natural radionuclides A eff of raw materials for the preparation of concrete is determined according to GOST 30108.

5.17 The quality indicators of large concrete aggregate are determined and evaluated according to GOST 8269.0 and GOST 8269.1, fine aggregate - according to GOST 8735.

5.18 The quality indicators of additives are determined according to GOST 30459 and evaluated according to GOST 24211, and, if necessary, according to.

5.19 Water quality is determined and evaluated according to GOST 23732.

5.20 False setting of cement is determined by the method given in.

Annex A
(reference)

A.1 Harmful impurities in aggregates include inclusions of the following rocks and minerals: amorphous varieties of silicon dioxide (chalcedony, opal, flint, etc.), sulfates (gypsum, anhydride, etc.), layered silicates (micas, hydromicas, chlorites, etc. .), magnetite, iron hydroxides (goethite, etc.), apatite, nepheline, phosphorite, halides (lalite, sylvin and others), zeolites, asbestos, graphite, coal, oil shale.

Harmful impurities can cause:

Reducing the strength and durability of concrete;

Deterioration of surface quality and internal corrosion of concrete;

Corrosion of reinforcement in concrete.

A.2 The main harmful impurities that reduce the strength and durability of concrete: coal, graphite, oil shale; layered silicates (micas, hydromicas, chlorites, etc.); zeolites, apatite, nepheline, phosphorite.

A.3 The main harmful impurities that cause deterioration of the surface quality and internal corrosion of concrete:

Amorphous varieties of silicon dioxide, soluble in alkalis (chalcedony, opal, flint, etc.), chlorite and some zeolites;

Sulfur, sulfides (pyrite, marcasite, pyrrhotite, etc.);

Sulfates (gypsum, anhydrite, etc.);

Magnetite, iron hydroxides (goethite, etc.).

A.4 The main harmful impurities that cause corrosion of reinforcement in concrete:

Halides (halite, sylvin, etc.) containing water-soluble chlorides;

Sulfur, sulfides and sulfates.

Annex B
(mandatory)

B.1 Concretes for road and airfield pavements and bases

B.1.1 Concrete for coatings and foundations of roads and airfields must meet the requirements for compressive and tensile strength in bending.

B.1.2 Technological indicators of the quality of concrete mixtures must comply with GOST 7473 and additional requirements of the project for the production of works.

The relative density of the concrete mixture in the compacted state should be at least 98% of the calculated one.

B.1.3 The beginning of the setting of cement for concrete coatings and bases should occur no earlier than 2 hours.

In concrete for coatings and foundations of roads and airfields, it is not allowed to use cement that has signs of false setting, plasticized and hydrophobic.

B.1.4 With the largest aggregate grain size of 80 mm, it is allowed, by agreement between the manufacturer and the consumer, to supply a mixture of fractions ranging in size from 5 to 40 mm.

2 - for single-layer and upper layer of two-layer pavements;

3 - for the bottom layer of two-layer coatings and road bases.

B.1.7 Grades for crushability of crushed stone, crushed stone from gravel and gravel used as a coarse aggregate in concrete coatings, and abrasion (in a shelf drum) should not be lower than those indicated in the table.

B.2 Concrete for transport construction

1.0 - for concrete span structures of bridges, bridge structures of the variable water level zone, culverts, reinforced concrete sleepers, contact network supports, communication lines and automatic blocking, power transmission line supports;

2.0 - for concrete of monolithic supports of bridges and foundations of culverts located outside the level of the variable water level zone.

B.2.3 For concrete of bridge structures located in the zone of variable water level, bridge deck structures of bridge spans, as well as culverts, crushed stone from igneous rocks of grade 1000 and higher, crushed stone from metamorphic and sedimentary rocks and gravel grade crushability 800 and above, crushability grade gravel 800 and above.

Aggregates, the strength of which, when saturated with water, decreases by more than 20% compared to their strength in a dry state, are not allowed to be used for concrete structures located in the zone of variable water level and the underwater zone.

B.2.4 For concrete of reinforced concrete sleepers, crushed stone from igneous rocks of a crushability grade of at least 1200, from metamorphic and sedimentary rocks of a crushability grade of at least 1000, and crushed stone from gravel of a crushability grade of at least 1000 should be used.

B.2.5 The use of gravel is not allowed for concrete:

Structures of bridges and culverts operated in areas with an average temperature of the coldest five-day period below minus 40 ° C;

Transport facilities with frost resistance grade F 2 200 and above;

Transport reinforced concrete structures designed for endurance.

1.0 - for concrete of prestressed spans operated in areas with an average outdoor temperature of the coldest five-day period below minus 40 ° C;

2.0 - for concrete spans and bridge structures operated in conditions of variable water levels.

B.2.7 The volume of entrained air in concrete mixtures for concrete of bridge structures with normalized frost resistance is taken according to the standards and specifications for concrete structures of a particular type.

The volume of entrained air must be, % of volume:

3.5 ± 1.5 - for bridge concrete and reinforced concrete structures;

5.5 ± 0.5 - for pavements of the carriageway of bridges.

B.2.8 Cement should be used as a binder in concrete for transport construction.

B.3 Concrete for hydraulic structures

B.3.1 It is allowed during the construction of massive hydraulic structures to use crushed stone and gravel with a grain size of:

From 120 to 150 mm;

St. 150 mm, introduced directly into the block when laying the concrete mix.

1.0 - for concrete used in the zone of variable water level and surface zone;

2.0 - for concrete used in underwater and inland areas.

B.3.3 For concrete of hydraulic structures operated in the zone of variable water level, the presence of clay in the form of separate lumps in a large aggregate is not allowed.

B.3.4 Grades for crushed stone must be at least 800.

Grades for crushability of gravel and crushed stone from gravel must be at least 1000.

B.3.5 For concrete, to which requirements for frost resistance are imposed, crushed stone from igneous rocks of a crushability grade of at least 1000 should be used.

B.3.6 Crushed stone and gravel for hydrotechnical concrete must have grades for abrasion in the shelf drum not lower than:

I-I - for crushed stone from igneous and metamorphic rocks;

I-II - for crushed stone from sedimentary rocks, as well as crushed stone from gravel.

B.3.8 Frost resistance of crushed stone and gravel for concrete of hydraulic structures should not be lower than that indicated in the table.

Cements for transport construction. Specifications

Working test procedure. Determination of false setting of cement, RM 5730-0284339-01-2003. NIITSEMENT, CEMISKON. Moscow, 2003

Keywords: heavy and fine-grained concrete, technical requirements, acceptance rules, test methods

GOST 26633−2012 INTERNATIONAL STANDARD HEAVY AND FINE GRAINED CONCRETE Specifications Heavy-weight and sand concretes. Specifications __________________________________________________________________ Date of introduction - 1 Scope This standard applies to heavy and fine-grained concretes with cement binders (hereinafter referred to as concretes) used in all areas of construction, and establishes technical requirements for concretes, rules for their acceptance, test methods. This standard does not apply to large-pore, chemically resistant and heat-resistant concretes. 2 Normative references This standard uses normative references to the following interstate standards: GOST 4.212−80 System of product quality indicators. Construction. Concrete. Nomenclature of indicators GOST 5578−94 Crushed stone and sand from slags of ferrous and non-ferrous metallurgy for concrete. Specifications GOST 7473−2010 Concrete mixes. Specifications GOST 8267−93 Crushed stone and gravel from dense rocks for construction work. Specifications GOST 8269.0−97 Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of physical and mechanical tests __________________________________________________________________________ Official edition 1 GOST 26633−2012 GOST 8269.1−97 Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of chemical analysis GOST 8735−88 Sand for construction work. Test methods GOST 8736−93 Sand for construction work. Specifications GOST 10060−2012 Concrete. Methods for determining frost resistance GOST 10178−85 Portland cement and slag Portland cement. Specifications GOST 10180−2012 Concrete. Methods for determining strength according to control samples GOST 10181−2000 Concrete mixes. Test methods GOST 12730.1-78 Concrete. Density determination method GOST 12730.2−78 Concrete. Moisture determination method GOST 12730.3−78 Concrete. Method for determining water absorption GOST 12730.4−78 Concrete. Methods for determining porosity indices GOST 12730.5−84 Concrete. Methods for determining water resistance GOST 13015−2012 Concrete and reinforced concrete products for construction. General technical requirements. Rules for acceptance, marking, transportation and storage GOST 13087−81 Concrete. Methods for determining abrasion GOST 17623−87 Concrete. Radioisotope method for determining the average density GOST 17624−2012 Concrete. Ultrasonic method for determining the strength of GOST 18105−2010 Concrete. Rules for monitoring and assessing the strength of GOST 21718−84 Building materials. Dielectric method for measuring moisture content GOST 22266−94 Sulphate-resistant cements. Specifications. GOST 22690−88 Concrete. Determination of strength by mechanical methods of non-destructive testing 2 GOST 26633−2012 GOST 22783−77 Concrete. Method for accelerated determination of compressive strength GOST 23422−87 Building materials. Neutron moisture measurement method GOST 23732−2011 Water for concrete and mortar. Specifications GOST 24211−2008 Additives for concrete and mortar. General specifications GOST 24316−80 Concrete. Method for determining heat release during hardening GOST 24452−80 Concrete. Methods for determining prismatic strength, modulus of elasticity and Poisson's ratio GOST 24544−81 Concrete. Methods for determining shrinkage and creep strains GOST 24545−81 Concrete. Endurance test methods GOST 25192−2012 Concrete. Classification and general technical requirements GOST 25592−91 Mixtures of ash and slag from thermal power plants for concrete. Specifications GOST 25818−91 Fly ash from thermal power plants for concrete. Specifications GOST 26644−85 Crushed stone and sand from slags of thermal power plants for concrete. Specifications GOST 27006−86 Concrete. Rules for selecting the composition GOST 27677−88 Corrosion protection in construction. Concrete. General requirements for testing GOST 28570−90 Concrete. Methods for determining the strength of samples taken from structures 3 GOST 26633−2012 GOST 29167−91 Concrete. Methods for determining the characteristics of crack resistance (fracture toughness) under static loading GOST 30108−94 Construction materials and products. Determination of specific effective activity of natural radionuclides GOST 30459−2008 Additives for concrete and mortars. Determination and evaluation of effectiveness GOST 30515−97 Cements. General specifications GOST 31108−2003 General construction cements. Specifications GOST 31383−2008 Protection of concrete and reinforced concrete structures against corrosion. Test methods GOST 31424−2010 Non-metallic building materials from screenings of crushing of dense rocks in the production of crushed stone. Specifications GOST 31384−2008 Protection of concrete and reinforced concrete structures against corrosion. General technical requirements . If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected. . 3 Technical requirements 3.1 The requirements of this standard should be observed when developing new and revising existing standards and specifications, design and technological documentation for precast concrete and reinforced concrete products (hereinafter referred to as products) and monolithic structures (hereinafter referred to as structures). 3.2 Concrete should be produced in accordance with the requirements of this standard, as well as with the requirements of design and technological documentation, standards and specifications for structures and products of specific types, approved in the prescribed manner. 4 GOST 26633−2012 3.3 Characteristics of concrete 3.3.1 Depending on the classification features, concretes are divided: - according to their main purpose: structural and special; - by type of aggregate: for concretes produced using dense aggregates and concretes produced using special aggregates; - according to the conditions of hardening: on concretes of natural hardening and concretes of accelerated hardening at atmospheric pressure. - by strength: for compressive strength classes at design age: B3.5; AT 5; B7.5; AT 10 O'CLOCK; B12.5; B15; IN 20; B25; B30; B35; B40; B45; B50; B55; B60; B70; B80; B90; B100. Note - It is allowed to use concrete of intermediate classes in terms of compressive strength B22.5 and B27.5; for axial tensile strength classes: Bt0.8; Bt1.2; Bt1.6; Bt2.0; Bt2.4; Bt2.8; Bt3.2; Bt3.6; Bt4.0, bending tensile strength classes: Btb0.4; Btb 0.8; Btb 1.2; Btb 1.6; btb 2.0; Btb 2.4; Btb 2.8; Btb 3.2; Btb 3.6; btb 4.0; Btb 4.4; Btb 4.8; Btb 5.2; Btb 5.6; btb 6.0; Btb 6.4; Btb 6.8; Btb 7.2; Btb 8.0; - by medium density: for heavy concrete grades D2000−D2500, fine-grained concrete grades D1800−D2300; - for frost resistance: for grades F50, F75, F100, F150, F200, F300, F400, F500, F600, F800, F1000; - for water resistance: for grades W2, W4, W6, W8, W10, W12, W14, W16, W18, W20; - by abrasion: for grades I-I; I-II; I-III when tested in a shelf drum, grades G1, G2, G3 when tested on abrasion circle. 3.3.2 Strength classes of concrete, grades for frost resistance, water resistance and abrasion resistance of concrete in structures and products of specific types 5 GOST 26633−2012 are established in accordance with design standards and are indicated in standards, specifications, design and technological documentation for structures and products. 3.3.3 Depending on the working conditions of concrete in various operating environments, the standards and specifications for products and working drawings of concrete and reinforced concrete structures should establish additional requirements for the quality of concrete according to the normalized quality indicators provided for by GOST 4.212. 3.3.4 The technical requirements for concrete, established in accordance with 3.3.1, must be provided by the manufacturer of structures and products at the design age, which is indicated in the design documentation and assigned in accordance with the design standards, depending on the conditions of concrete hardening, construction methods and terms. actual loading of these structures and products. If the design age is not specified, the technical requirements for concrete must be provided at the age of 28 days. The values of the normalized indicators of the tempering and transfer (for prestressed products) concrete strengths are set in the design of a specific product and are indicated in the standard or technical specifications for this product. The normalized values of the strength of concrete of monolithic structures at an intermediate age (after removal of the supporting formwork, etc.) are established in the technological documentation (project for the production of works or technological regulations). 3.3.5 The total chloride content in concrete (in terms of Cl− ion) should not exceed: 1% of the mass in unreinforced concrete; 0.4% of the mass in concrete with non-stressed reinforcement; 0.1% by weight in prestressed concrete. 6 GOST 26633−2012 3.3.6 During the manufacture of products and structures, as well as the construction and operation of buildings and structures made of concrete, harmful substances should not be released into the external environment in quantities exceeding the current sanitary and hygienic standards,. 3.3.7 The minimum cement consumption in concretes operated in non-aggressive environments, depending on the type of structures and their operating conditions, must correspond to that given in Table 1. Table 1 - Minimum cement consumption in concretes operated in non-aggressive environments Type of construction Non-reinforced Reinforced with non-tensioned reinforcement Reinforced with prestressed reinforcement Operating conditions according to GOST 31384 X0 Type and consumption of cements, kg/m3 -D0, CEM II CEM IV, CEM I CEM V Do not standardize XC4 150 170 170 X0 150 170 180 XC4 200 220 240 X0 220 240 270 XC4 240 270 300 other boundary conditions for the composition of concrete should be taken in accordance with GOST 31384 and technical specifications, design and technological documentation for products and structures of a particular type. 3.4 Requirements for concrete mixtures 3.4.1 Concrete mixtures must comply with the requirements of GOST 7473. 3.4.2 The composition of concrete is selected according to GOST 27006. 7 GOST 26633−2012 3.5 Requirements for materials for concrete 3.5.1 Requirements for binders 3.5.1.1 As binders materials, cements should be used according to GOST 10178, GOST 22266, GOST 31108 and. 3.5.1.2 The type and class (grade) of cement should be selected in accordance with the purpose of structures and products, their operating conditions in accordance with GOST 31384, the required strength classes of concrete, frost resistance grades, water resistance and abrasion resistance, decorative properties based on the requirements of standards, specifications and design documentation for these structures and products. 3.5.2 Requirements for aggregates 3.5.2.1 Crushed stone and gravel from dense rocks according to GOST 8267, crushed stone from screenings of crushing dense rocks according to GOST 31424, crushed stone from blast-furnace and ferroalloy slags of ferrous metallurgy and nickel and copper smelting are used as coarse aggregates for concrete. non-ferrous metallurgy slag according to GOST 5578, as well as crushed stone from thermal power plant slag according to GOST 26644. Coarse aggregates should have an average grain density of 2000 to 3000 kg / m3. 3.5.2.2 As fine aggregates for concrete, natural sand or sand from screenings of rock crushing with a true density of 2000 to 2800 kg/m3, their mixtures (with fineness modulus from 1.5 to 3.0) that meet the requirements of GOST 8736 are used or GOST 31424, sand from blast-furnace and ferroalloy slags of ferrous metallurgy and nickel and copper-smelting slags of non-ferrous metallurgy in accordance with GOST 5578, as well as ash and slag mixtures in accordance with GOST 25592. The largest aggregate grain size should be set in the standards, specifications or working drawings of concrete and reinforced concrete structures and products. 8 GOST 26633-2012 Standard coarse aggregate fractions depending on the largest grain size are given in Table 2. Table 2 - Standard coarse aggregate fractions The largest aggregate size, mm 10 20 40 80 120 Coarse aggregate fraction From 5 to 10 or from 3 to 10 » 5(3) » 10; St. 10 » 20 » 5 (3) » 10; » 10 » 20; St. 20 to 40 » 5 (3) » 10; » 10 » 20; » 20 » 40; St. 40 to 80 » 5 (3) » 10; » 10 » 20; » 20 » 40; » 40 » 80; St. 80 to 120 It is allowed to use large aggregates in the form of a mixture of two adjacent fractions that meet the requirements of Table 3. 3.5.2.4 The recommended content of individual fractions in coarse aggregate in the concrete composition is indicated in Table 3. Table 3 - Recommended content of individual fractions of coarse aggregate in the concrete composition The largest aggregate size, mm 10 20 40 80 120 filler, % of 5(3) St. 10 St. 20 St. 40 St. 80 up to 10 mm up to 20 mm up to 40 mm up to 80 mm up to 120 mm 100 − − − − 25−40 60−75 − − − 15−25 20−35 40−65 − − 10−20 15−25 20−35 35−55 − 5−10 10−20 15−25 20−30 25−35 3.5.2.5 The content of dust and clay particles in crushed stone from igneous and metamorphic rocks, crushed stone from gravel and in gravel should not exceed 1% of the mass. The content of dust and clay particles in crushed stone from sedimentary rocks should not exceed 3% of the mass. 3.5.2.6 The content of lamellar (flaky) and needle-shaped grains in coarse aggregate shall not exceed 35% by weight. 3.5.2.7 Types of harmful impurities in aggregates and the nature of their possible impact on concrete are given in Appendix A. 9 GOST 26633-2012 The permissible content of rocks and minerals classified as harmful impurities in aggregates should not exceed the values given in Table 4. T a f and 4 - Permissible content of harmful impurities in aggregates Name of harmful impurities Permissible content Minimum content of amorphous varieties According to GOST 8269.0 * silicon dioxide, (chalcedony, opal, flint, acid glass, weathered quartz, etc.), at which alkaline corrosion of concrete depending on the type of reaction rocks Sulfur, sulfides, except for pyrite (marcasite, pyrrhotite, etc.) and sulfates (gypsum, anhydrite, etc.) in terms of SO3: - for coarse aggregate 1.5% mass - for fine aggregate 1.0% mass Pyrite in terms of SO3 4.0% mass Layered silicates (micas, hydromicas, chlorites, etc., which are rock-forming minerals): - for coarse aggregate 15% by volume - for m fine aggregate 2.0% by weight Magnetite, iron hydroxides (goethite, etc.), apatite, 10% by volume nepheline, phosphorite, which are rock-forming minerals 15% by volume - each separately - in total Halides (halite, sylvin, etc.), containing 0.10% mass water-soluble chlorides, in terms of chlorine ion 0.15% mass - for coarse aggregate - for fine aggregate Free asbestos fiber 0.25% mass Coal 1% mass * The ability of aggregates to react with alkalis should be determine by the expansion deformation when tested in accordance with GOST 8269.0. 3.5.2.8 Fillers containing inclusions of harmful impurities exceeding the values given in 3. 5.2.7, as well as zeolite, graphite and oil shale, can be used for the production of concrete only after testing in concrete in accordance with the requirements of 3.5.5. 3.5.2.9 For the use of crushed stone from sedimentary carbonate rocks of aphanitic structure and igneous volcanic rocks of vitreous structure, their tests in concrete shall be carried out in accordance with 3.5.5. 10 GOST 26633-2012 3.5.2.10 Specific effective activity of natural radionuclides Aeff in aggregates used for preparation of concrete mixtures shall not exceed the limit values depending on the field of application of concrete according to GOST 30108. 3.5.3 Requirements for additives and water 3.5.3.1 Chemical additives used in concrete must comply with the requirements of GOST 24211, as well as the standards and specifications for which they are produced. 3.5.3.2 The total amount of chemical additives should not exceed the maximum dosages specified by the manufacturer, and should not exceed 5% of the mass of cement. 3.5.3.3 Additives (except for air-entraining additives), used in an amount of less than 0.2% of the mass of cement, are introduced into the concrete mixture with mixing water. 3.5.3.4 Compatibility of admixtures with concrete components and among themselves shall be checked when selecting the concrete composition. 3.5.3.5 Water for mixing the concrete mixture and preparing solutions of chemical additives must comply with the requirements of GOST 23732. laboratories to confirm the possibility and technical and economic feasibility of obtaining concrete mixes and concretes with all standardized quality indicators required by the project and the required durability. 4 Acceptance rules 4.1 Acceptance of concrete mixtures is carried out in accordance with GOST 7473. 4.2 Acceptance of concrete of prefabricated concrete and reinforced concrete products for all normalized quality indicators established by the project is carried out in accordance with GOST 13015 at the place of their manufacture. 11 GOST 26633−2012 4.3 Acceptance of concrete of monolithic structures is carried out according to all normalized quality indicators established by the project of buildings and structures and the project for the production of works or technological regulations at the construction site. 4.4 Acceptance of concrete for strength is carried out for each batch of prefabricated products and monolithic structures in accordance with GOST 18105. 4.5 Acceptance of concrete for other normalized quality indicators (frost resistance, water resistance, abrasion, water absorption, etc. ) is carried out when selecting a new nominal composition of concrete according to GOST 27006, and then periodically in accordance with the technical specifications, design and technological documentation for products and structures of a particular type, as well as when changing the nominal composition of concrete, its manufacturing technology and the quality of the materials used, but at least once every 6 months. Periodic tests in terms of the specific effective activity of natural radionuclides Aeff in aggregates are carried out when selecting the composition of concrete, as well as when changing the quality of the materials used, but at least once a year. If it is necessary to determine and control other normalized indicators of the quality of concrete (moisture content, shrinkage deformation, creep, endurance, heat generation, prismatic strength, modulus of elasticity, Poisson's ratio, protective properties of concrete in relation to steel reinforcement, etc.), their assessment is carried out in accordance with the requirements standards and specifications for concrete structures and products of specific types. 5 Control methods 5.1 The strength of concrete is determined according to GOST 10180, GOST 22783, GOST 28570, GOST 22690, GOST 17624. The strength of concrete is controlled and evaluated according to GOST 18105. 5.2 The frost resistance of concrete is determined and evaluated according to GOST 10060. 5.3 The water resistance of concrete is determined and evaluated according to GOST 12730.5. 12 GOST 26633−2012 5.4 The average density of concrete is determined and evaluated according to GOST 12730.1 or GOST 17623. 5.5 The moisture content of concrete is determined and evaluated according to GOST 12730.2 or GOST 21718, or GOST 23422. 5.6 Water absorption of concrete is determined and evaluated according to GOST 12730.3. 5.7 Concrete porosity indicators are determined and evaluated according to GOST 12730.4. 5.8 Abrasion of concrete is determined and evaluated according to GOST 13087. 5.9 Prism strength, modulus of elasticity and Poisson's ratio of concrete are determined and evaluated according to GOST 24452. 5.10 Shrinkage and creep deformations of concrete are determined and evaluated according to GOST 24544; 5.11 The endurance of concrete is determined and evaluated according to GOST 24545. 5.12 The heat release of concrete is determined and evaluated according to GOST 24316. 5.13 The crack resistance characteristics of concrete are determined and evaluated according to GOST 29167. 5.14 The protective properties of concrete in relation to steel reinforcement are checked according to GOST 31383. 5.15 The corrosion resistance of concrete is determined and evaluated according to GOST 27677. 5.16 The specific effective activity of natural radionuclides Aeff of raw materials for the preparation of concrete is determined according to GOST 30108. 5.17 The quality indicators of coarse concrete aggregate are determined and evaluated according to GOST 8269. 0 and GOST 8269.1, fine aggregate - according to GOST 8735. 5.18 The quality indicators of additives are determined according to GOST 30459 and evaluated according to GOST 24211 and, if necessary, according to 3.5.5. 5.19 Water quality is determined and evaluated according to GOST 23732. 5.20 False setting of cement is determined by , . 13 GOST 26633−2012 Appendix A (reference) The nature of the possible impact of harmful impurities in aggregates on concrete A.1 Harmful impurities in aggregates include inclusions of the following rocks and minerals: amorphous varieties of silicon dioxide (chalcedony, opal, flint, etc.), sulfates (gypsum, anhydride, etc.), layered silicates (micas, hydromicas, chlorites, etc.), magnetite, iron hydroxides (goethite, etc.), apatite, nepheline, phosphorite, halides (lalite, sylvin, and others), zeolites, asbestos, graphite, coal, oil shale. Harmful impurities can cause: - decrease in the strength and durability of concrete; - deterioration of surface quality and internal corrosion of concrete; - corrosion of reinforcement in concrete. A.2 The main harmful impurities that reduce the strength and durability of concrete: coal, graphite, oil shale; layered silicates (micas, hydromicas, chlorites, etc.); zeolites, apatite, nepheline, phosphorite. A.3 The main harmful impurities that cause deterioration of the surface quality and internal corrosion of concrete: - amorphous varieties of silicon dioxide soluble in alkalis (chalcedony, opal, flint, etc.), chlorite and some zeolites; - sulfur, sulfides (pyrite, marcasite, pyrrhotite, etc.); - sulfates (gypsum, anhydrite, etc.); - magnetite, iron hydroxides (goethite, etc.). A.4 The main harmful impurities that cause corrosion of reinforcement in concrete: - halides (halite, sylvin, etc.) containing water-soluble chlorides; - sulfur, sulfides and sulfates. 14 GOST 26633−2012 Appendix B (mandatory) Additional requirements for concrete intended for various types of construction B.1 Concrete for road and airfield pavements and bases B.1.1 Concrete for pavements and bases of roads and airfields must comply with the requirements for compressive strength and stretching in bending. B.1.2 Technological indicators of the quality of concrete mixtures must comply with GOST 7473 and additional requirements of the project for the production of works. The relative density of the concrete mixture in the compacted state must be at least 98% of the calculated one. B.1.3 The beginning of setting of cement for concrete pavements and bases should occur no earlier than 2 hours. In concrete for pavements and bases of roads and airfields, it is not allowed to use cement that has signs of false setting, plasticized and hydrophobic. The content of C3A mineral in cement for concrete coatings should not exceed 7% by weight, and the content of alkali oxides in terms of Na2O - 0.8% by weight. B.1.4 With the largest aggregate grain size of 80 mm, it is allowed, by agreement between the manufacturer and the consumer, to supply a mixture of fractions ranging in size from 5 to 40 mm. B.1.5 The content of dust and clay particles in crushed stone from sedimentary rocks should not exceed, % of the mass: 2 - for single-layer and upper layer of two-layer road surfaces; 3 - for the bottom layer of two-layer pavements and road bases. B.1.6 The content of lamellar (flaky) and needle-shaped grains in coarse aggregate for concrete coatings should not exceed 25% of the mass. 15 GOST 26633−2012 B.1.7 Grades for crushability of crushed stone, crushed stone from gravel and gravel used as a coarse aggregate in concrete coatings, and abrasion (in a shelf drum) should not be lower than those indicated in Table B.1. Table B.1 - Grades of crushed stone, crushed stone from gravel and gravel by crushability and abrasion Type of aggregate Grade by crushability by abrasion Crushed stone and crushed stone from gravel from igneous or metamorphic rocks Crushed stone and crushed stone from gravel from sedimentary rocks Gravel 1200 I-I 800 1000 I-II I-II Grade for crushability of crushed stone from sedimentary rocks in base concrete should not be lower than 400. Grades for frost resistance of coarse aggregate for concrete coatings and bases should not be lower than the values \u200b\u200bspecified in Table B.2. Table B.2 - Grades for frost resistance of coarse aggregate Purpose of concrete For coatings For foundations Grade for frost resistance of coarse aggregate for concrete operated in an area with an average monthly temperature of the coldest month, not lower From 0 ° С to minus 5 ° С From minus 5 °С to minus 15 Below minus 15 °С °С F50 F100 F150 F15 F25 F25 B.1.9 The optimal grain composition of sand in concrete for pavements and foundations of roads and airfields should correspond to that given in Table B.3. In this case, only grains passing through a sieve with round holes with a diameter of 5 mm are taken into account. In case of discrepancy between the grain composition of sand for concrete pavements and foundations of roads and airfields, it is necessary to conduct studies according to 3.5.5. 16 to the specified requirements of GOST 26633-2012 Table B.3 - Grain composition of fine aggregate Size module From 1.5 to 2.0 Total residue,%, on sieves with openings, mm 2.5 1.25 0.63 0.315 0.14 Up to 10 5 to 10 20 to 30 35 to 65 80 to 85 2.0 2.5 10 10 25 30 55 65 80 85 90 2.5 3 B 1.10 The strength grades of the original rock or gravel from which sand is made from crushed screenings and enriched sand from crushed screenings for concrete road and airfield pavements and bases should not be lower than those given in Table B.4, which should be indicated in the document on quality for sand. Table B.4 - Strength grades of the original rock and gravel for sand production Purpose of concrete Coatings Base Strength grade of the original rock or gravel from which sand is made gravel igneous sedimentary and metads morphic rocks 800 800 1000 800 400 600 B.1.11 Working test procedure. Determination of false setting of cement For concrete of structural layers of roads and airfields, the water-cement ratio and the volume of air involved in the concrete mixture should correspond to those given in Table B.5. Table B.4 - Water-cement ratio and volume of air entrained for concrete of structural layers of roads and airfields Structural layer Coatings Bases Water-cement ratio, not more than 0.45 0.90 Volume of air entrained in the concrete mixture, % 6±1 Not standardized 17 GOST 26633−2012 B.2 Concrete for transport construction B.2.1 The content of dust and clay particles in crushed stone from sedimentary rocks should not exceed the following values,% by weight: 1.0 - for concrete of superstructures of bridges, bridge structures of the variable zone water level, culverts, reinforced concrete sleepers, contact network supports, communication lines and automatic blocking, power transmission line supports; 2.0 - for concrete of monolithic supports of bridges and foundations of culverts located outside the level of the variable water level zone. B.2.2 The content in large aggregates of lamellar (flaky) and needle-shaped grains for concrete of reinforced concrete sleepers, power transmission line supports, contact network, communication lines and automatic blocking should not exceed 15% of the mass. B.2.3 For concrete of bridge structures located in the zone of variable water level, structures of the bridge deck of spans of bridges, as well as culverts, crushed stone from igneous rocks of grade 1000 and higher should be used; crushed stone from metamorphic and sedimentary rocks and gravel grade for crushing 800 and above; gravel brand for crushability 800 and above. Aggregates, the strength of which, when saturated with water, decreases by more than 20% compared to their strength in a dry state, are not allowed to be used for concrete structures located in the zone of variable water level and the underwater zone. B. 2.4 For concrete of reinforced concrete sleepers, crushed stone from igneous rocks of a crushability grade of at least 1200, from metamorphic and sedimentary rocks of a crushability grade of at least 1000, and crushed stone from gravel of a crushability grade of at least 1000 should be used. B.2.5 The use of gravel is not allowed for concrete: - structures of bridges and culverts operated in areas with an average temperature of the coldest five-day period below minus 40 °C; - transport facilities with frost resistance grade F2200 and higher; 18 GOST 26633−2012 - transport reinforced concrete structures calculated for endurance. B.2.6 The content of dust-like and clay particles in fine aggregate for concrete of transport structures should not exceed, % mass: 1.0 - for concrete of prestressed span structures operated in areas with an average outdoor temperature of the coldest five-day period below minus 40 ° C; 2.0 - for concrete spans and bridge structures operated in conditions of variable water levels. B.2.7 The volume of entrained air in concrete mixtures for concrete of bridge structures with normalized frost resistance is taken according to the standards and specifications for concrete structures of a particular type. The volume of entrained air should be, % of volume: 3.5 ± 1.5 - for bridge concrete and reinforced concrete structures; 5.5 ± 0.5 - for pavements of the carriageway of bridges. B.3 Concrete for hydraulic structures B.3.1 It is allowed during the construction of massive hydraulic structures to use crushed stone and gravel with a grain size of: - from 120 to 150 mm; - St. 150 mm inserted directly into the block when placing the concrete mix. B.3.2 The content of dust-like and clay particles in crushed stone, crushed stone from gravel and in gravel should not exceed, % of the mass: 1.0 - for concrete used in the zone of variable water level and above-water zone; 2.0 - for concrete used in underwater and inland areas. B.3.3 For concrete of hydraulic structures operated in the zone of variable water level, the presence of clay in the form of separate lumps in a large aggregate is not allowed. 19 GOST 26633-2012 B.3.4 Crushability grades for crushed stone should be at least 800. Crushability grades for gravel and crushed stone from gravel should be at least 1000. B.3.5 For concrete that requires frost resistance, crushed stone from igneous crushability grade rocks not less than 1000. B.3.6 Crushed stone and gravel for hydrotechnical concrete must have abrasion grades in the shelf drum not lower than: I-I - for crushed stone from igneous and metamorphic rocks; I-II - for crushed stone from sedimentary rocks, as well as crushed stone from gravel. B3.7 The content of grains of weak rocks in crushed stone and crushed stone from gravel for concrete of hydraulic structures in the zone of variable water level should not exceed 5% of the mass. B.3.8 Frost resistance of crushed stone and gravel for concrete of hydraulic structures should not be lower than that indicated in Table B.5. Table B.5 - Frost resistance of crushed stone and gravel for concrete of hydraulic structures Average monthly temperature of the coldest month, ° C Frost resistance of crushed stone and gravel From 0 to minus 10 From minus 10 to minus 20 Below minus 20 F100 F200 F300 B. 3.9 For hydraulic structures made of concrete with normalized frost resistance of F2200 and higher, operated under conditions of saturation with sea or mineralized water, the volume of air involved in the concrete mixture must correspond to that indicated in Table B.6. 20 GOST 26633−2012 Table B.6 - The volume of air involved in the concrete mixture for concrete of hydraulic structures Maximum fineness of aggregate grains, mm 10 20 40 80 The volume of air involved in the concrete mixture,%, with W / C less than 0.41 from 0.41 to 0.50 more than 0.50 3±1 4±1 6±1 3±1 5±1 2±1 4±1 2±1 3±1 in sand, dust and clay particles should not exceed, % of the mass: 2 - for concrete in the zone of variable water level; 3 - for concrete of the above-water zone; 5 - for concrete of the underwater zone. The use of fine aggregate containing clay in the form of separate lumps is not allowed. B.3.11 The content of mica in fine aggregate for concrete of hydraulic structures should not exceed, % of the mass: 1 - for concrete of the variable water level zone; 2 - for concrete of the surface zone; 3 - for concrete of the underwater zone. B.4 High-strength concretes (class B60 and above) B.4.1 Technological indicators of the quality of concrete mixtures must comply with GOST 7473 and additional requirements of the technological regulations for the production of concrete works or the project for the production of works. B.4.2 Consumption of cement in high-strength heavy concrete should not exceed 550 kg/m3, in high-strength fine-grained concrete - 750 kg/m3 corresponding to the requirements of GOST 8736. 21 GOST 26633−2012 B.4.5 As a coarse aggregate, crushed stone from dense rocks of a crushing grade of at least 1000 with a ratio of fractions stipulated by the requirements of GOST 8267 should be used. 22 GOST 26633−2012 Bibliography GN 2.2.5.313- 03 Maximum allowable concentrations (MPC) of harmful substances in the air of the working area GN 2. 2.5.314-03 Approximate safe exposure levels (SHEL) of harmful substances in the air of the working area GOST R 55224−2012 Cements for transport construction. Specifications Working test procedure. Determination of false setting of cement, RM 5730-0284339-01-2003 NIITSEMENT, CEMISKON. Moscow 2003 Working procedure for determining the false setting of cement Research Institute Giprocement - Nauka. St. Petersburg 23 GOST 26633−2012 _________________________________________________________________ UDC 691.32:620.001.4:006.354 MKS 91.100.30 NEQ Keywords: heavy and fine-grained concrete, technical requirements, acceptance rules, test methods Gvozdeva Head of development, head of the laboratory 24 I. I. Karpukhin M. I. Brusser

Put into effect by order of the Federal Agency for Technical Regulation and Metrology dated March 17, 2016 N 165-st

Interstate standard GOST 26633-2015
"HEAVY AND FINE-GRAINED CONCRETE. TECHNICAL CONDITIONS"

Heavy weight and sand concretes. Specifications

Instead of GOST 26633-2012

Foreword

Goals, basic principles and the basic procedure for work on interstate standardization are established by GOST 1.0-92 "Interstate standardization system. Basic provisions" and GOST 1.2-2009 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption, application , updates and cancellations"

About the standard

1 Developed by the Research, Design and Technological Institute of Concrete and Reinforced Concrete. A.A. Gvozdev (NIIZhB) - a structural subdivision of OAO "NIC "Construction"

2 Introduced by the Technical Committee for Standardization TC 465 "Construction"

3 Adopted by the Interstate Council for Standardization, Metrology and Certification (Minutes of December 10, 2015 N 48)

4 By order of the Federal Agency for Technical Regulation and Metrology of March 17, 2016 N 165-st, the interstate standard GOST 26633-2015 was put into effect as the national standard of the Russian Federation from September 1, 2016.

5 Instead of GOST 26633-2012

1 area of use

This standard applies to structural heavy and fine-grained concretes on cement binders and dense aggregates (hereinafter referred to as concretes) used in all areas of construction and climatic zones, and establishes technical requirements for concretes, rules for their acceptance, control methods.

The standard does not apply to prestressing, large-porous, acid-resistant, heat-resistant, radiation-protective, extra-heavy and dispersed-reinforced concretes.

This standard uses normative references to the following interstate standards:

GOST 4.212-80 System of product quality indicators. Construction. Concrete. Nomenclature of indicators

GOST 5578-94 Crushed stone and sand from slags of ferrous and non-ferrous metallurgy for concrete. Specifications

GOST 7473-2010 Concrete mixes. Specifications

GOST 8267-93 Crushed stone and gravel from dense rocks for construction work. Specifications

GOST 8269.1-97 Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of chemical analysis

GOST 8735-88 Sand for construction work. Test Methods

GOST 8736-2014 Sand for construction work. Specifications

GOST 10060-2012 Concrete. Methods for determining frost resistance

GOST 10178-85 Portland cement and Portland slag cement. Specifications

GOST 10180-2012 Concrete. Methods for determining the strength of control samples

GOST 12730.1-78 Concrete. Methods for determining density

GOST 12730.5-84 Concrete. Methods for determining water resistance

GOST 13015-2012 Concrete and reinforced concrete products for construction. General technical requirements. Rules for acceptance, labeling, transportation and storage

GOST 13087-81 Concrete. Methods for determining abrasion

GOST 17623-87 Concrete. Radioisotope method for determining the average density

GOST 17624-2012 Concrete. Ultrasonic strength determination method

GOST 18105-2010 Concrete. Strength control and assessment rules

GOST 22266-2013 Sulphate-resistant cements. Specifications

GOST 22690-2015 Concrete. Determination of strength by mechanical methods of non-destructive testing

GOST 22783-77 Concrete. Method for accelerated determination of compressive strength

GOST 23732-2011 Water for concrete and mortar. Specifications

GOST 24211-2008 Additives for concrete and mortars. General specifications

GOST 24316-80 Concrete. Method for determining heat release during hardening

GOST 24452-80 Concrete. Methods for determining prism strength, modulus of elasticity and Poisson's ratio

GOST 24544-81 Concrete. Methods for determining shrinkage and creep strains

GOST 24545-81 Concrete. Endurance test methods

GOST 25192-2012 Concrete. Classification and general technical requirements

GOST 25592-91 Ash and slag mixtures for thermal power plants for concrete. Specifications

GOST 25818-91 Fly ash from thermal power plants for concrete. Specifications

GOST 26644-85 Crushed stone and sand from slags of thermal power plants for concrete. Specifications

GOST 27006-86 Concrete. Squad selection rules

GOST 27751-2014 Reliability of building structures and foundations. Key points

GOST 28570-90 Concrete. Methods for determining strength from samples taken from structures

GOST 29167-91 Concrete. Methods for determining the characteristics of crack resistance (fracture toughness) under static loading

GOST 30108-94 Building materials and products. Determination of specific effective activity of natural radionuclides

GOST 31108-2003 General construction cements. Specifications

GOST 31384-2008 Protection of concrete and reinforced concrete structures against corrosion. General specifications

GOST 31424-2010 Non-metallic building materials from screenings of crushing dense rocks in the production of crushed stone. Specifications

GOST 31914-2012 High-strength heavy and fine-grained concrete for monolithic structures. Rules for quality control and assessment

GOST 32495-2013 Crushed stone, sand and sand-crushed stone mixtures from crushed concrete and reinforced concrete. Specifications

GOST 33174-2014 Public automobile roads. Cement. Technical requirements

GOST ISO/IEC 17025-2009 General requirements for the competence of testing and calibration laboratories

Note- When using this standard, it is advisable to check the effect of reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or according to the annual information index "National Standards", which was published as of January 1 of the current year, and on issues of the monthly information index "National Standards" for the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

This standard uses the terms according to GOST 7473, GOST 13015, GOST 18105, GOST 24211, as well as the following terms with the corresponding definitions:

3.1 concrete: Artificial stone-like building material obtained by shaping and curing rationally selected and compacted concrete mix.

3.2 heavy concrete: Concrete of a dense structure with an average density of more than 2000 to 2500 kg / m 3 inclusive on a cement binder and dense coarse and fine aggregates.

3.3 fine-grained concrete: Concrete of a dense structure with an average density of more than 2000 to 2500 kg / m 3 inclusive on a cement binder and dense fine aggregate.

3.4 prefabricated concrete and reinforced concrete products: Products made of concrete or reinforced concrete intended for the construction of buildings and structures, manufactured outside the place of their final use.

3.5 monolithic concrete and reinforced concrete structures: Structures made of concrete and reinforced concrete, manufactured directly at the construction site during the construction of buildings and structures.

3.6 supporting research: Examination of concretes for the preparation of which, if necessary, it is planned to use materials with quality indicators that differ from the requirements of this standard.

Note- The purpose of substantiating studies is to assess the possibility and technical and economic feasibility of obtaining concrete with normalized quality indicators. Substantiating studies should be carried out in laboratories that comply with the requirements of GOST ISO / IEC 17025.

4 Technical requirements

4.1 The requirements of this standard should be observed when developing design and technological documentation for prefabricated concrete and reinforced concrete products and monolithic structures, developing new and revising existing standards and specifications.

4.2 Concrete should be produced in accordance with the requirements of this standard, as well as standards and specifications for products and structures of specific types, approved in the prescribed manner.

Additional requirements for concrete intended for various areas of construction, and materials for their preparation are given in Appendix A.

4.3 Characteristics of concrete

4.3.1 Concrete is subdivided according to quality indicators:

By strength:

for compressive strength classes: B3.5; AT 5; B7.5; AT 10 O'CLOCK; B12.5; B15; IN 20; B22.5; B25; B27.5; B30, B35; B40; B45; B50; B55; B60; B70; B80; B90; B100; B110; B120,

for axial tensile strength classes: B t 0.8; Bt 1.2; Bt 1.6; Bt 2.0; Bt 2.4; Bt 2.8; Bt 3.2; Bt 3.6; Bt 4.0; Bt 4.4; Bt 4.8,

for bending tensile strength classes: B tb 1.2: B tb 1.6; Btb 2.0; Btb 2.4; Btb 2.8; Btb 3.2; Btb 3.6; Btb 4.0; Btb 4.4; Btb 4.8; Btb 5.2; Btb 5.6; Btb 6.0; Btb 6.4; Btb 6.8; Btb 7.2; Btb 7.6; Btb 8.0; Btb 8.4; Btb 8.8; Btb 9.2; Btb 9.6; Btb 10.0;

For frost resistance:

for stamps according to the first basic method: F 1 50, F 1 75, F 1 100, F 1 150, F 1 200, F 1 300, F 1 400, F 1 500, F 1 600, F 1 800, F 1 1000 ;

for stamps according to the second basic method: F 2 100, F 2 150, F 2 200, F 2 300, F 2 400, F 2 500;

According to water resistance for brands: W2, W4, W6, W8, W10, W12, W14, W16, W18, W20;

By abrasion when tested on abrasion circle for grades: G1, G2, G3.

4.3.2 Concrete strength classes, frost resistance, water resistance and abrasion grades are set in accordance with design standards and are indicated in design and technological documentation, standards and specifications for products and structures.

4.3.3 Types of concrete according to the rate of curing are set in accordance with GOST 25192.

4.3.4 Depending on the working conditions of concrete in various operating environments, in accordance with GOST 31384, it is allowed to establish additional requirements for concrete according to standardized quality indicators in accordance with GOST 4.212.

4.3.5 The age of concrete, in which the given technical requirements are provided, must be indicated in the project. The design age of concrete is assigned in accordance with design standards, taking into account the conditions of concrete hardening, methods of erection and the timing of the actual loading of structures. If the design age is not specified, the technical requirements for concrete must be provided at the age of 28 days.

4.3.6 The values of the normalized indicators of the tempering and transfer strength of concrete of prefabricated concrete and reinforced concrete products are set in the standards or specifications for these products.

4.3.7 The values of the normalized strength indicators of concrete of monolithic structures at an intermediate age are set in the technological documentation.

4.3.8 The minimum class of concrete in terms of compressive strength for reinforced products and structures is taken in accordance with GOST 13015.

4.3.9 During the manufacture of products and structures, as well as the construction and operation of buildings and structures made of concrete, harmful substances should not be released into the external environment in quantities exceeding the current sanitary and hygienic standards.

4.4 Requirements for concrete mixtures

4.4.1 Concrete mixtures must comply with the requirements of GOST 7473.

4.4.2 The composition of the concrete mixture should be selected in accordance with GOST 27006, taking into account the requirements of GOST 31384. The selection of the composition of the concrete mixture for concrete of structures of classes KS-2 and KS-3 according to GOST 27751 is carried out in laboratories that meet the requirements of GOST ISO / IEC 17025.

4.4.3 Concrete mixes for concrete of frost resistance grade F 1 200 (F 2 100) and higher should be produced using air-entraining (gas-forming) additives. The content of entrained air in the concrete mixture must be at least 4%.

4.4.4 When assigning several design requirements to concrete, the composition of the concrete mixture must ensure the production of concrete with standardized indicators in accordance with the requirements of this standard.

4.5 Material requirements for concrete

4.5.1 Cements, coarse and fine aggregates, water and additives must comply with the requirements of standards and specifications, taking into account the requirements of GOST 31384.

4.5.2 The specific effective activity of natural radionuclides A eff in materials used for the preparation of concrete mixes should not exceed the limit values established by GOST 30108.

4.5.3 The possibility of using materials for concrete, the quality indicators of which do not meet the requirements of this standard, must be confirmed by substantiating studies.

4.6 Binders

4.6.1 As binders, cements should be used that meet the requirements of GOST 10178, GOST 22266, GOST 31108, GOST 33174 and.

4.6.2 In aggressive operating conditions of products and structures, the type of cement should be selected according to GOST 31384.

4.6.3 For concrete of compressive strength class B60 and higher, Portland cement without mineral additives of a grade not lower than PC 500 according to GOST 10178 or a class not lower than CEM I 42.5 according to GOST 31108 with a C 3 A content of not more than 8% should be used.

4.6.4 The minimum consumption of cement for heavy concretes operated in a non-aggressive environment, depending on the type of structure, must correspond to that given in table 1.

Table 1 - Minimum cement consumption for heavy concrete

4.6.5 The minimum consumption of cement for heavy concrete intended for the manufacture of products and structures operated in aggressive environments should be taken in accordance with GOST 31384.

4.7 Placeholders

4.7.1 Aggregates for concrete are selected according to grain composition, strength, frost resistance, density, content of dust and clay particles, the presence and content of harmful and foreign contaminants, radiation-hygienic characteristics and other quality indicators in accordance with GOST 8267 and GOST 8736.

4.7.2 As a fine aggregate for concrete, natural sand is used according to GOST 8736, sand from rock crushing screenings according to GOST 31424, their mixtures, sand from blast-furnace and ferroalloy slags of ferrous metallurgy according to GOST 5578, as well as fine-grained ash and slag mixtures according to GOST 25592. The true density of fine aggregate should be in the range from 2000 to 2800 kg/m 3 inclusive.

4.7.5 Crushed stone, crushed stone from gravel and gravel from dense rocks according to GOST 8267, crushed stone from screenings from crushing dense rocks according to GOST 31424, crushed stone from blast-furnace and ferroalloy slags of ferrous metallurgy according to GOST 5578, crushed stone from crushed concrete and reinforced concrete according to GOST 32495, crushed stone from thermal power plant slag according to GOST 26644. The average density of coarse aggregate should be in the range from 2000 to 3000 kg / m 3 inclusive.

4.7.6 Crushed stone from crushed concrete and reinforced concrete should not be used in concrete of a compressive strength class higher than B35.

4.7.7 Types of harmful impurities in aggregates and their permissible content - according to GOST 8267 and GOST 8736.

4.7.8 The largest aggregate grain size should be established in the standards, specifications or other regulatory and technical documents for concrete and reinforced concrete products and structures approved in the prescribed manner.

4.7.9 Coarse aggregate should be used in the form of separately dosed fractions in the preparation of concrete mix. It is allowed to use coarse aggregate in the form of a mixture of two adjacent fractions that meet the requirements given in Table 2.

Table 2 - The content of individual fractions of coarse aggregate in the composition of concrete

4.7.10 As a coarse aggregate for concrete of classes in compressive strength B60 and above, crushed stone from dense rocks according to GOST 8267 of a crushing grade of at least 1200 should be used. The content of grains of weak rocks in crushed stone for concrete of classes B60 and above should not exceed 5% masses.

4.7.13 With design requirements for concrete of frost resistance grade F 1 200 (F 2 100) and higher, coarse aggregate from igneous and metamorphic rocks with water absorption of not more than 1.0%, from sedimentary rocks - with water absorption of not more than 2.5 %.

4.7.14 The frost resistance grade of large aggregates, depending on the operating temperature of structures and products, except for pavements and foundations of roads and airfields, buried structures of concrete preparations and foundations, hydraulic structures, should not be lower than that indicated in Table 3.

Table 3 - Grade for frost resistance of large aggregates and depending on the operating temperature of structures and products

4.7.15 When crushed stone from igneous rocks of aphanitic and vitreous structures is used, they must be tested in concrete.

4.8 Mixing water

Water for mixing the concrete mixture and preparing solutions of chemical additives must comply with the requirements of GOST 23732.

4.9 Additives

4.9.1 Additives must comply with the requirements of GOST 24211,,, as well as the standards and specifications for which they are produced.

4.9.2 Fly ash used as an additive must comply with GOST 25818.

4.9.3 When using additives in accordance with GOST 24211, including those containing chloride salts, the requirements specified in paragraph 6.4.3 of GOST 31384 should be met.

5 Acceptance rules

5.1 Acceptance of concrete of prefabricated concrete and reinforced concrete products according to all normalized quality indicators, established standard or technical specifications for these products, approved in the prescribed manner, should be carried out at the place of their manufacture in accordance with GOST 13015.

5.2 Acceptance of concrete of monolithic concrete and reinforced concrete structures is carried out according to the quality indicators established in the design and technological documentation, approved in the prescribed manner.

5.3 Acceptance of concrete for strength is carried out for each batch of products and structures in accordance with GOST 18105, high-strength concrete - in accordance with GOST 31914.

5.4 Acceptance of concrete in terms of frost resistance, water resistance, abrasion is carried out on the basis of test results obtained when selecting the nominal composition of the concrete mixture in accordance with GOST 27006, then periodically in accordance with the standards or specifications for products and structures of a particular type, approved in the prescribed manner, as well as when changing the nominal composition, but at least once every 6 months.

6 Control methods

6.1 The strength of concrete is determined according to GOST 10180, GOST 22783, GOST 28570, GOST 22690, GOST 17624, GOST 31914.

The strength of concrete is controlled and evaluated according to GOST 18105 and GOST 31914.

6.2 Frost resistance of concrete is determined and evaluated according to GOST 10060.

6.3 The water resistance of concrete is determined and evaluated according to GOST 12730.5, GOST 31914.

6.4 Abrasion of concrete is determined according to GOST 13087 and evaluated according to GOST 13015.

6.5 The average density of concrete is determined according to GOST 12730.1, GOST 17623.

6.6 Concrete control according to additionally established quality indicators (shrinkage deformation, creep, heat release during hardening, prism strength, modulus of elasticity, endurance, crack resistance, etc.) is carried out according to the methods established in GOST 24544, GOST 24316, GOST 24452, GOST 24545, GOST 29167, respectively, or in other regulatory and technical documents approved in the prescribed manner.

6.7 In the absence of standard methods for determining additional quality indicators, test methods are developed in specialized research organizations in the prescribed manner, agreed with the design organization and indicated in the technical documentation.

6.8 The specific effective activity of natural radionuclides A eff in materials for the preparation of concrete mix is determined according to GOST 30108.

Annex A
(mandatory)

Additional requirements for concrete intended for various areas of construction, and materials for their preparation

A.1 Concrete for hydraulic engineering

A.1.1 Requirements for concrete of hydraulic structures should be established depending on the degree of aggressive effect of the environment on concrete in different zones of the structure and with the obligatory consideration of the massiveness of structures and the location of structures in hydraulic structures in relation to the water horizon.

A.1.2 Cements should be selected depending on the location of the structure zone and the aggressiveness of the environment, taking into account the requirements of GOST 31384:

For concrete of the inner and underwater zone of the structure - sulfate-resistant cements according to GOST 22266, Portland cement and Portland slag cement according to GOST 10178. or cements of CEM I - CEM V types according to GOST 31108.

For concrete of the outer zone and the zone of variable water level - sulfate-resistant cements of the types CEM I SS, CEM ll / A-Sh SS, CEM II / V-Sh SS according to GOST 22266, Portland cement PC D0-N and PC D20-N with a granulated mineral additive blast-furnace slag up to 15% according to GOST 10178; cements of types CEM I. CEM II based on clinker with a content of C 3 A up to 7%, C 3 S up to 60% with a mineral additive of granulated blast-furnace slag up to 15% according to GOST 31108.

A.1.3 For concrete of massive structures, sulfate-resistant cement according to GOST 22266 based on clinker with a C 3 S content of up to 60%, Portland slag cement and Portland cement according to GOST 10178, cements of the CEM I-CEM V types according to GOST 31108 based on clinker with a C 3 content should be used A up to 7%, C 3 S up to 60%.

A.1.4 For concrete of the inner zone of hydraulic structures, it is allowed to use sand with a content of dust and clay particles up to 15%, provided that the design requirements for strength and water tightness are met.

A.1.6 Clay in lumps in coarse and fine aggregates for concrete of hydraulic structures is not allowed.

1 - for concrete of the zone of variable water level;

2 - for concrete of the surface outer zone;

3 - for concrete of the inner and underwater zones.

A.1.8 Frost resistance of sand for concrete of hydraulic structures should be determined on a fraction of 1.25 - 5.0 mm. After 25 cycles of freezing and thawing according to GOST 8735, the content of the fraction less than 1.25 mm should not be more than 7%.

A.1.9 For concrete surfaces exposed to a high-speed water flow (weirs, tunnel linings, etc.), crushed stone, crushed stone from gravel and boulders or gravel with a crushing strength of at least 1000, abrasion grade in a shelf drum, AND -l.

A.1.10 It is allowed to use crushed stone and gravel with grains ranging in size from 120 to 150 mm during the construction of massive hydraulic structures.

When using gravel (boulders) with a grain size of more than 150 mm, it (them) should be introduced directly into the concreting block when laying the concrete mixture.

A.2 Concretes for road and airfield pavements and bases

A.2.1 Requirements for concrete for pavements and foundations of roads and airfields in terms of compressive strength, tensile strength in bending and frost resistance should be established depending on the type of structural layer and climatic operating conditions.

A.2.2 Portland cement based on clinker of normalized mineralogical composition in accordance with GOST 10178, cement in accordance with GOST 33174 or cement for transport construction in accordance with (2) should be used as a binder for concrete coatings and bases of highways and airfields.

A.2.3 Grades for crushability of the original rock or gravel, from which sand is made from crushed screenings and enriched wood from crushed screenings for concrete pavements and foundations of roads and airfields, should not be lower than those given in Table A.1.

Table A.1 - Grades for crushability of the original rock and gravel for the manufacture of sand from crushing screenings

A.2.4 The frost resistance grade of the original rock or gravel, from which sand from crushing screenings or enriched sand from crushing screenings is made, should not be lower than the frost resistance grade of concrete.

A.2.5 Clay in lumps in coarse and fine aggregates for concrete coatings and bases of roads and airfields is not allowed.

A.2.6 Grain composition of fine aggregate for concrete pavements and foundations of roads and airfields is given in Table A.2. in this case, only grains passing through a sieve with round holes with a diameter of 5 mm are taken into account.

Table A.2 - Grain composition of fine aggregate

Size modulus	Total residue, %, on sieves with openings, ml
Size modulus
1.5 to 2.0
Over 2.0 to 2.5		St. 10 to 25	St. 30 to 55	St. 65 to 80	St. 85 to 90
Over 2.5 to 3.0	St. 10 to 20	St. 25 to 45	St. 55 to 70	St. 80 to 90	St. 90 to 95

A.2.7 Grades for crushing and abrasion in the shelf drum of crushed stone and crushed stone from gravel, used as a coarse aggregate for concrete pavements of roads and airfields, should not be lower than those indicated in Table A.3.

Table A.3 - Grades of crushed stone and crushed stone from gravel according to crushability and abrasion

A.2.8 The grade for crushability of crushed stone from igneous rocks for concrete foundations of roads and airfields should be at least 800, crushed stone from metamorphic rocks and crushed stone from gravel - at least 600, crushed stone from sedimentary rocks - at least 400.

A.2.9 The frost resistance grade of coarse aggregate should not be lower than the frost resistance grade of concrete.

2 - for single-layer and upper layer of two-layer coatings of roads and airfields;

3 - for the lower layer of two-layer coatings and bases of roads and airfields.

А.2.12 For concrete pavements of roads and airfields, water-reducing/plasticizing and air-entraining (gas-forming) additives should be used simultaneously.

A.2.13 For concrete of structural layers of roads and airfields, the water-cement ratio and the volume of air involved in the concrete mixture should correspond to those given in Table A.4.

Table A.4 — Water-cement ratio and volume of entrained air for concrete of structural layers of roads and airfields

A.2.14 The density of the concrete mixture for coatings and foundations of roads and airfields in a compacted state in relation to the density of the mixture obtained by calculating the method of absolute volumes should be at least 0.98 for heavy concrete and at least 0.96 for fine-grained concrete.

A.2.15 The minimum consumption of cement in the concrete of the foundations of roads and airfields must be at least 150 kg/m 3 .

A.2.16 Justification studies (see paragraph 4.5.3 of this standard) of concrete pavements and foundations of roads and airfields are carried out in comparison with concrete on standard materials, for which the required frost resistance has been proven by tests. Substantiating studies of concrete pavement and foundations of roads and airfields are carried out when concrete is brought to a critical decrease in the characteristics of concrete.

A.3 Concrete for transport construction

A.3.1 Requirements for concrete of transport structures (bridges, viaducts, flyovers, pipes, etc.) should be established depending on the degree of aggressive impact of the environment on concrete and climatic operating conditions. Requirements for concrete of reinforced concrete sleepers, contact network supports should be set taking into account protection against electrocorrosion in accordance with GOST 31384.

A.3.2 For concrete of structural elements of transport structures exposed to de-icing agents, the requirements for concrete should be established taking into account the requirements given in section A.2.

A.3.3 Portland cement based on clinker of a normalized mineralogical composition according to GOST 10178, sulfate-resistant cement according to GOST 22666, cement according to GOST 31108 based on clinker with a content of C 3 A up to 7% or cement in accordance with.

A.3.5 Clay in lumps in coarse and fine aggregates for concrete of transport facilities is not allowed.

A.3.6 Frost resistance of sand for concrete of transport facilities should be determined on a fraction of 1.25 - 5.0 mm. After 25 cycles of freezing and thawing, when tested in accordance with GOST 8735, the content of a fraction less than 1.25 mm should not be more than 7%.

A.3.8 Crushed stone from igneous rocks should be used for concrete of bridge structures. The content of dust and clay particles in crushed stone should not exceed 1% of the mass.

A.3.9 The average density of coarse aggregate for concrete of bridge structures should be in the range from 2000 to 2800 kg/m 3 inclusive.

A.3.10 For concrete of reinforced concrete sleepers, crushed stone from igneous rocks of a crushability grade of at least 1200, from metamorphic and sedimentary rocks of a crushability grade of at least 1000, and crushed stone from gravel of a crushability grade of at least 1000 should be used.

A.3.11 Aggregates, the strength of which, when saturated with water, decreases by more than 20% compared to their strength in a dry state, are not allowed to be used for concrete of bridge structures.

A.3.13 The maximum consumption of cement for concrete of bridge structures should not exceed:

For concrete class B35 - 450 kg / m 3;

For concrete class B40 - 500 kg / m 3;

For concrete class B45 and above - 550 kg / m 3.

Bibliography

The manufacture and composition of heavy fine-grained concrete mixtures is regulated by state standard No. 26633 2012. Our article will tell you more about the brands of ready-made mixtures, as well as the physical properties of heavy concrete and its areas of use.

Consider the composition and properties.

Specifications

Ready-mixed concrete has a high specific gravity, which is approximately 1800–2500 kg/m³. the composition contains a large amount of cement, coarse and fine filler and water. The remaining additives depend on the manufacturer, but are regulated by the instructions of GOST 26633 2012. In the article you can read about how to count.

Item No.:	Designation of concrete solution:	Brand of cement used:	Specific gravity (kg/m³):	Waterproof:	Frost resistance:	Mobility (affects ease of installation):	The proportions of the composition (per 1 m³):
Item No.:	Designation of concrete solution:	Brand of cement used:	Specific gravity (kg/m³):	Waterproof:	Frost resistance:	Mobility (affects ease of installation):	Cement, kg:	Sand, kg:	Crushed stone, kg:	Water, l:
1.	At 15.	M 200.	2400.	6.	200.	P 2.	260.	900.	1086.	155.
2.	IN 20.	M 250.	2390.	6.	200.	P 3.	320.	860.	1040.	165.
3.	At 22.5.	M 300.	2400.	8.	300.	P 3.	360.	830.	1040.	165.
4.	At 25	M 350.	2395.	8.	300.	P 4.	420.	795.	1000.	175.
5.	BSG B 30.	M 400.	2410.	10.	300.	P 4.	470.	760.	1000.	175.

The brand of cement plays an important role in the creation of high-quality heavy concrete. All possible variations are used, starting from M 100, for which the achievement of the required strength is ensured by special impurities. Concrete made using cement M 700 and above are heavy. But the most popular and in demand are concrete mixtures prepared using cement M 200-350.

It is best not to perform such work in such extreme conditions, but if necessary, additional insulation, heating of reinforcing structures and this special additive can be used.

What are the characteristics of concrete 200 can be read

Thanks to the defoamer, the hardened surface will have an even appearance without characteristic "craters" and pits.

The use of special additives makes the solution more convenient to use, eliminating minor flaws and improving the advantages. Most builders prefer to work with improved concretes. This will significantly save time and effort, as well as some building materials. Such solutions are easier to lay, and the finished surface has good strength and uniformity, without visible defects and flaws.

About what is the composition of concrete M 400 per 1 m-2 can be read in this

Application area

Heavy concrete solutions are widely used in domestic and engineering construction. It is more expedient to carry out all load-bearing and power elements of buildings and structures from heavy concrete. If the scope of light mixes is limited to the construction of walls and ceilings, then heavy concrete accounts for everything else. You can use as a base.

What is the composition of concrete M 200 per 1 m-2 can be read from

Heavy concretes are characterized by natural shrinkage for 2–3 years after installation, so this factor must be taken into account.

For residential buildings built using heavy compounds, for example, additional thermal insulation may also be needed, since the material itself has a high thermal conductivity.

What are the proportions of concrete grade 200 can be found in this

Manufacture of reinforced concrete products, foundations of various types, hydraulic structures, floor slabs, floor screeds, concrete cushion for road surfaces and curb stone production. All this is just a short list of the possibilities of using heavy concrete.

GOST 26633-2012

INTERSTATE STANDARD
HEAVY AND FINE GRAIN CONCRETE
Specifications
Heavy weight and sand concretes. Specifications

ISS 91.100.30

Introduction date 2014-01-01

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by the "Interstate standardization system. Basic provisions" and "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption, application, updating and cancellation"

About the standard

1 DEVELOPED by the Research, Design and Technological Institute of Concrete and Reinforced Concrete named after A.A.

2 INTRODUCED by the Technical Committee for Standardization TC 465 "Construction"

3 ADOPTED by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Conformity Assessment in Construction (MNTKS) (Minutes of December 18, 2012 N 41)

Short name of the country according to MK (ISO 3166) 004-97	Country code according to MK (ISO 3166) 004-97	Abbreviated name of the national body of state management of construction
Azerbaijan	AZ	State Committee for Urban Planning and Architecture
Armenia	AM	Ministry of Urban Development
Kazakhstan	KZ	Agency for Construction and Housing and Communal Services
Kyrgyzstan	KG	Gosstroy
Moldova	MD	Ministry of Construction and Regional Development
Russia	EN	Ministry of Regional Development
Tajikistan	TJ	Agency for Construction and Architecture under the Government
Uzbekistan	USD	Gosarchitektstroy

5 By order of the Federal Agency for Technical Regulation and Metrology dated December 27, 2012 N 1975-st, the interstate standard GOST 26633-2012 was put into effect as the national standard of the Russian Federation from January 1, 2014.

6 INSTEAD OF GOST 26633-91

1 area of use

The standard does not apply to large-porous, chemically resistant, heat-resistant and radiation-protective concretes.

2 Normative references

This standard uses normative references to the following interstate standards:

	System of indicators of product quality. Construction. Concrete. Nomenclature of indicators
	Crushed stone and sand from slags of ferrous and non-ferrous metallurgy for concrete. Specifications
GOST 7473-2010	Concrete mixes. Specifications
	Crushed stone and gravel from dense rocks for construction work. Specifications
	Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of physical and mechanical tests
	Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of chemical analysis
	Sand for construction work. Test Methods
	Sand for construction work. Specifications
GOST 10060-2012	Concrete. Methods for determining frost resistance
	Portland cement and slag Portland cement. Specifications
GOST 10180-2012	Concrete. Methods for determining the strength of control samples
	Concrete. Density determination method
GOST 12730.2-78	Concrete. Moisture determination method
	Concrete. Method for determining water absorption
	Concrete. Methods for determining porosity indicators
	Concrete. Methods for determining water resistance
GOST 13015-2012	Concrete and reinforced concrete products for construction. General technical requirements. Rules for acceptance, labeling, transportation and storage
	Concrete. Methods for determining abrasion
	Concrete. Radioisotope method for determining the average density
GOST 17624-2012	Concrete. Ultrasonic strength determination method
GOST 18105-2010	Concrete. Strength control and assessment rules
	Construction materials. Dielectric method for measuring moisture
	The cements are sulfate resistant. Specifications
	Concrete. Determination of strength by mechanical methods of non-destructive testing
	Concrete. Method for accelerated determination of compressive strength
	Construction materials. Neutron moisture measurement method
GOST 23732-2011	Water for concretes and mortars. Specifications
	Additives for concrete and mortars. General specifications
	Concrete. Method for determining heat release during hardening
	Concrete. Methods for determining prism strength, modulus of elasticity and Poisson's ratio
	Concrete. Methods for determining shrinkage and creep strains
	Concrete. Endurance test methods
	Mixtures of ash and slag from thermal power plants for concrete. Specifications
	Fly ash from thermal power plants for concrete. Specifications
	Crushed stone and sand from slags of thermal power plants for concrete. Specifications
	Concrete. Squad selection rules
	Corrosion protection in construction. Concrete. General requirements for testing
	Concrete. Methods for determining strength from samples taken from structures
	Concrete. Methods for determining the characteristics of crack resistance (fracture toughness) under static loading
	Building materials and products. Determination of specific effective activity of natural radionuclides
	Additives for concrete and mortars. Definition and evaluation of effectiveness
	Cements for general construction. Specifications
	Protection of concrete and reinforced concrete structures against corrosion. Test Methods
	Protection of concrete and reinforced concrete structures against corrosion. General technical requirements
GOST 31424-2010	Building non-metallic materials from screenings of crushing of dense rocks in the production of crushed stone. Specifications
GOST 31914-2012	High-strength heavy and fine-grained concretes for monolithic structures. Control and evaluation rules

Note - When using this standard, it is advisable to check the validity of reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or according to the annual information index "National Standards", which was published as of January 1 of the current year, and on issues of the monthly information index "National Standards" for the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Technical requirements

3.1 The requirements of this standard should be observed when developing new and revising existing standards and specifications, design and process documentation for prefabricated concrete and reinforced concrete products (hereinafter referred to as products) and monolithic structures (hereinafter referred to as structures).

3.2 Concrete should be produced in accordance with the requirements of this standard, as well as with the requirements of design and technological documentation, standards and specifications for structures and products of specific types, approved in the prescribed manner.

3.3 Characteristics of concrete

3.3.1 Depending on the classification features, concretes are divided into:

according to the main purpose: for structural and special;
by type of aggregate: for concrete produced using dense aggregates and concrete produced using special aggregates;
according to the conditions of hardening: for concretes of natural hardening and concretes of accelerated hardening at atmospheric pressure;
by strength:
- for compressive strength classes at design age: B3.5; AT 5; B7.5; AT 10 O'CLOCK; B12.5; B15; IN 20; B25; B30; B35; B40; B45; B50; B55; B60; B70; B80; B90; B100.
- for axial tensile strength classes: B t 0.8; Bt 1.2; Bt 1.6; Bt 2.0; Bt 2.4; Bt 2.8; Bt 3.2; Bt 3.6; Bt 4.0,
- for tensile strength classes in bending: B tb 0.4; Btb 0.8; Btb 1.2; Btb 1.6; Btb 2.0; Btb 2.4; Btb 2.8; Btb 3.2; Btb 3.6; Btb 4.0; Btb 4.4; Btb 4.8; Btb 5.2; Btb 5.6; Btb 6.0; Btb 6.4; Btb 6.8; Btb 7.2; Btb 8.0;
by medium density: for heavy concrete grades D2000-D2500, fine-grained concrete grades D1800-D2300;
frost resistance: for grades F50, F75, F100, F150, F200, F300, F400, F500, F600, F800, F1000;
for water resistance: for grades W2, W4, W6, W8, W10, W12, W14, W16, W18, W20;
by abrasion: grades G1, G2, G3 (when tested on the abrasion circle).

3.3.2 Concrete strength classes, frost resistance grades, water resistance and abrasion resistance of concrete in structures and products of specific types are established in accordance with design standards and indicated in standards, specifications, design and technological documentation for structures and products.

3.3.3 Depending on the working conditions of concrete in various operating environments, standards and specifications for products and working drawings of concrete and reinforced concrete structures should establish additional requirements for the quality of concrete according to the standardized quality indicators provided for.

3.3.4 The technical requirements for concrete, established in accordance with 3.3.1, must be provided by the manufacturer of structures and products at the design age, which is indicated in the design documentation and assigned in accordance with the design standards, depending on the conditions of concrete hardening, construction methods and terms. actual loading of these structures and products. If the design age is not specified, the technical requirements for concrete must be provided at the age of 28 days.

3.3.5 The total chloride content in concrete (in terms of Cl - ion) should not exceed:

1% by weight in non-reinforced concrete;
0.4% by weight in concrete with non-stressed reinforcement;
0.1% by weight in prestressed concrete.

3.3.6 During the manufacture of products and structures, as well as the construction and operation of buildings and structures made of concrete, no harmful substances shall be released into the external environment in quantities exceeding the current sanitary and hygienic standards.

3.3.7 The minimum consumption of cement in concretes operated in non-aggressive environments, depending on the type of structures and their operating conditions, must correspond to that given in Table 1.

Table 1

Minimum consumption of cement in concretes operated in non-aggressive environments

Construction type	Operating conditions according to	Type and consumption of cements, kg / m 3
Construction type	Operating conditions according to	PC-D0, PC-D5, SSPTs-D0, CEM I	PTS-D20, SSPTS-20, CEM II	ShPTs, SSSHPTs, CEM III, CEM IV, CEM V
Unreinforced	X0	Do not ration
Unreinforced	XC4	150	170	170
Reinforced with non-tensioned reinforcement	X0	150	170	180
Reinforced with non-tensioned reinforcement	XC4	200	220	240
Reinforced with prestressed reinforcement	X0	220	240	270
Reinforced with prestressed reinforcement	XC4	240	270	300

3.3.8 For concrete structures operated in aggressive environments, the minimum consumption of cement and other boundary conditions for the composition of concrete should be taken according to the technical specifications, design and technological documentation for products and structures of a particular type.

3.4 Requirements for concrete mixtures

3.4.1 Concrete mixtures must comply with the requirements of GOST 7473-2010.

3.4.2 The composition of concrete is selected according to.

3.4.3 The temperature of the concrete mixture at the time of delivery should not be lower than 5 °C.

3.5 Material requirements for concrete

3.5.1 Requirements for binders

3.5.1.1 As binders, cements according to, and item 3 should be used.

3.5.1.2 The type and class (grade) of cement should be selected in accordance with the purpose of structures and products, their operating conditions according to the required strength classes of concrete, grades for frost resistance, water resistance and abrasion resistance, decorative properties based on the requirements of standards, specifications and design documentation for these designs and products.

3.5.2 Requirements for placeholders

3.5.2.1 As coarse aggregates for concrete, crushed stone and gravel from dense rocks according to, crushed stone from screenings from crushing dense rocks according to GOST 31424-2010, crushed stone from blast-furnace and ferroalloy slags of ferrous metallurgy and nickel and copper-smelting slags of non-ferrous metallurgy according to, and also crushed stone from thermal power plant slag according to. Coarse aggregates should have an average grain density of 2000 to 3000 kg/m 3 .

3.5.2.2 As fine aggregates for concrete, natural sand or sand from screenings of crushing rocks with a true density of 2000 to 2800 kg / m 3, their mixtures that meet the requirements or GOST 31424-2010, sand from blast furnace and ferroalloy slags of ferrous metallurgy are used and nickel and copper-smelting slags from non-ferrous metallurgy according to , as well as ash and slag mixtures according to , fly ash according to .

table 2

Standard fractions of coarse aggregate

From

before

from

before

5
(3)

10;

St.

5
(3)

10;

20;

St.

before

5
(3)

10;

20;

40;

St.

before

5
(3)

10;

20;

40;

80;
St.
80
before
120

It is allowed to use large aggregates in the form of a mixture of two adjacent fractions that meet the requirements of Table 3.

The largest aggregate size, mm	The content of fractions in coarse aggregate,% of the mass
The largest aggregate size, mm	From 5 (3) to 10 mm	St. 10 to 20 mm	St. 20 to 40 mm	St. 40 to 80 mm	St. 80 to 120 mm
10	100	-	-	-	-
20	25-40	60-75	-	-	-
40	15-25	20-35	40-65	-	-
80	10-20	15-25	20-35	35-55	-
120	5-10	10-20	15-25	20-30	25-35

3.5.2.7 Types of harmful impurities in aggregates and the nature of their possible impact on concrete are given in Appendix A.

Permissible content in aggregates of rocks and minerals classified as harmful impurities should not exceed the values given in Table 4.

Table 4

Permissible content of harmful impurities in aggregates

Name of harmful impurities	Permissible content
The minimum content of amorphous varieties of silicon dioxide (chalcedony, opal, flint, acid glass, weathered quartz, etc.), at which alkaline corrosion of concrete is possible, depending on the type of reaction rocks	By *
Sulfur, sulfides, except for pyrite (marcasite, pyrrhotite, etc.), and sulfates (gypsum, anhydrite, etc.), in terms of SO 3 - for coarse aggregate - for fine aggregate	1.5% mass 1.0% mass
Pyrite in terms of SO 3	4.0% mass
Layered silicates (micas, hydromicas, chlorites, etc., which are rock-forming minerals): - for coarse aggregate - for fine aggregate	15% volume 2.0% mass
Magnetite, iron hydroxides (goethite, etc.), apatite, nepheline, phosphorite, which are rock-forming minerals: - each individually - in total	10% volume 15% volume
Halides (halite, sylvin, etc.) containing water-soluble chlorides, calculated as a chloride ion: - for coarse aggregate - for fine aggregate	0.10% mass 0.15% mass
Loose Asbestos Fiber	0.25% mass
Coal	1% mass
* The ability of aggregates to react with alkalis should be determined by the expansion deformation when tested according to .

3.5.2.8 Aggregates containing inclusions of harmful impurities exceeding the values given in 3.5.2.7, as well as zeolite, graphite and oil shale, can be used for concrete production only after testing in concrete in accordance with the requirements of 3.5.4

3.5.2.9 For the use of crushed stone from sedimentary carbonate rocks of aphanitic structure and igneous volcanic rocks of vitreous structure, they must be tested in concrete in accordance with 3.5.4.

3.5.2.10 The specific effective activity of natural radionuclides A eff in aggregates used for the preparation of concrete mixtures shall not exceed the limit values depending on the area of application of concrete according to .

3.5.3 Requirements for additives and water

3.5.3.1 Chemical additives used in concrete must comply with the requirements, as well as the standards and specifications for which they are produced.

3.5.3.2 The total amount of chemical additives should not exceed the maximum dosages specified by the manufacturer, and should not exceed 5% of the mass of cement.

3.5.3.3 Additives (except for air-entraining additives) used in an amount of less than 0.2% of the mass of cement are introduced into the concrete mixture with mixing water.

3.5.3.4 Compatibility of admixtures with concrete components and among themselves shall be checked when selecting the concrete composition.

3.5.3.5 Water for mixing the concrete mixture and preparing solutions of chemical additives must comply with the requirements of GOST 23732-2011.

3.5.4 The use in exceptional cases of materials for concrete, the quality and quantity of which do not meet the requirements of this standard, must be justified by preliminary studies in accredited laboratories to confirm the possibility and feasibility of obtaining concrete mixes and concretes with all standardized indicators required by the project quality and required durability.

4 Acceptance rules

4.1 Acceptance of concrete mixtures is carried out in accordance with GOST 7473-2010.

4.2 Acceptance of concrete of prefabricated concrete and reinforced concrete products according to all normalized quality indicators established by the project is carried out in accordance with GOST 13015-2012 at the place of their manufacture.

4.4 Acceptance of concrete for strength is carried out for each batch of prefabricated products and monolithic structures in accordance with GOST 18105-2010.

4.5 Acceptance of concrete according to other normalized quality indicators (frost resistance, water resistance, abrasion, water absorption, etc.) is carried out when selecting a new nominal composition of concrete according to, and then periodically in accordance with the technical specifications, design and technological documentation for products and structures of a particular type, as well as when changing the nominal composition of concrete, the technology of its manufacture and the quality of the materials used, but at least once every 6 months.

Periodic tests in terms of the specific effective activity of natural radionuclides A eff in aggregates are carried out when selecting the composition of concrete, as well as when changing the quality of the materials used, but at least once a year.

5 Control methods

5.1 The strength of concrete is determined according to GOST 10180-2012, GOST 17624-2012.

The strength of concrete is controlled and evaluated according to GOST 18105-2010.

5.2 The frost resistance of concrete is determined and evaluated according to GOST 10060-2012.

5.3 The water resistance of concrete is determined and evaluated by .

5.4 The average density of concrete is determined and evaluated by or.

5.5 The moisture content of concrete is determined and evaluated according to GOST 12730.2-78 or, or.

5.6 The water absorption of concrete is determined and evaluated by.

5.7 The porosity of concrete is determined and evaluated by.

5.8 Abrasion of concrete is determined and evaluated by.

5.9 The prism strength, modulus of elasticity and Poisson's ratio of concrete are determined and evaluated by .

5.10 Shrinkage and creep deformations of concrete are determined and evaluated according to .

5.11 The endurance of concrete is determined and evaluated by.

5.12 The heat release of concrete is determined and evaluated by.

5.13 The crack resistance characteristics of concrete are determined and evaluated according to .

5.14 The protective properties of concrete in relation to steel reinforcement are checked according to.

5.15 The corrosion resistance of concrete is determined and evaluated according to.

5.16 The specific effective activity of natural radionuclides A eff of raw materials for the preparation of concrete is determined by .

5.17 The quality indicators of coarse concrete aggregate are determined and evaluated by and, fine aggregate - by.

5.18 The quality indicators of additives are determined by and evaluated by , and, if necessary, by 3.5.4.

5.19 Water quality is determined and evaluated according to GOST 23732-2011.

5.20 False setting of cement is determined by the method given in paragraph 4.

Annex A (informative).

The nature of the possible impact of harmful impurities in aggregates on concrete

Harmful impurities can cause:

decrease in the strength and durability of concrete;
surface deterioration and internal corrosion of concrete;
corrosion of reinforcement in concrete.

A.3 The main harmful impurities that cause deterioration of the surface quality and internal corrosion of concrete:

amorphous varieties of silicon dioxide, soluble in alkalis (chalcedony, opal, flint, etc.), chlorite and some zeolites;
sulfur, sulfides (pyrite, marcasite, pyrrhotite, etc.);
sulfates (gypsum, anhydrite, etc.);
magnetite, iron hydroxides (goethite, etc.).

A.4 The main harmful impurities that cause corrosion of reinforcement in concrete:

halides (halite, sylvin, etc.) containing water-soluble chlorides;
sulfur, sulfides and sulfates.

Annex B (mandatory).

Additional requirements for concrete intended for various types of construction

B.1 Concretes for road and airfield pavements and bases

B.1.1 Concrete for coatings and foundations of roads and airfields must meet the requirements for compressive and tensile strength in bending.

B.1.2 Technological indicators of the quality of concrete mixtures must comply with GOST 7473-2010 and additional requirements of the project for the production of works.

The relative density of the concrete mixture in the compacted state must be at least 98% of the calculated one.

B.1.3 The beginning of the setting of cement for concrete coatings and bases should occur no earlier than 2 hours.

In concrete for coatings and foundations of roads and airfields, it is not allowed to use cement that has signs of false setting, plasticized and hydrophobic.

B.1.4 With the largest aggregate grain size of 80 mm, it is allowed, by agreement between the manufacturer and the consumer, to supply a mixture of fractions ranging in size from 5 to 40 mm.

2 - for single-layer and upper layer of two-layer pavements;

3 - for the bottom layer of two-layer coatings and road bases.

B.1.7 Grades for crushed stone, crushed stone from gravel and gravel used as a coarse aggregate in concrete coatings, and abrasion (in a shelf drum) should not be lower than those indicated in Table B.1.

Table B.1

Brands of crushed stone, crushed stone from gravel and gravel according to crushability and abrasion

The grade for crushability of crushed stone from sedimentary rocks in base concrete must be at least 400.

Grades for frost resistance of coarse aggregate for concrete coatings and bases should not be lower than the values \u200b\u200bspecified in Table B.2.

Table B.2

Grades for frost resistance of coarse aggregate

B.1.8 In the concrete of coatings, an additive of a plasticizer (superplasticizer) and an air-entraining or gas-forming additive should be used simultaneously.

B.1.9 The optimal grain composition of sand in concrete for pavements and foundations of roads and airfields should correspond to that given in Table B.3. In this case, only grains passing through a sieve with round holes with a diameter of 5 mm are taken into account.

If the grain composition of sand for concrete coatings and foundations of roads and airfields does not meet the specified requirements, it is necessary to conduct studies according to 3.5.4.

Table B.3

Grain composition of fine aggregate

Before

From

before

From

before

From

before

From

before

2,0

2,5

3,0

From

before

3,0

3,5

100

B.1.10 The strength grades of the original rock or gravel, from which sand is made from crushing screenings and enriched sand from crushed screenings for concrete road and airfield pavements and bases, should not be lower than those given in Table B.4, which should be indicated in the sand quality document.

Table B.4

Brands for the strength of the original rock and gravel for sand production

B.1.11 For concrete of structural layers of roads and airfields, the water-cement ratio and the volume of air involved in the concrete mixture must correspond to those given in Table B.5.

Table B.5

Water-cement ratio and volume of entrained air for concrete of structural layers of roads and airfields

B.1.12 Cement according to clause 3 should be used as a binder in concrete for road and airfield pavements and bases.

B.2 Concrete for transport construction

2.0 - for concrete of monolithic supports of bridges and foundations of culverts located outside the level of the variable water level zone.

B.2.5 The use of gravel is not allowed for concrete:

Structures of bridges and culverts operated in areas with an average temperature of the coldest five-day period below minus 40 ° C;

Transport facilities with a brand for frost resistance F2*200 and above (concrete grade designation corresponds to the original);

Transport reinforced concrete structures designed for endurance.

1.0 - for concrete of prestressed spans operated in areas with an average outdoor temperature of the coldest five-day period below minus 40 ° C;

2.0 - for concrete spans and bridge structures operated in conditions of variable water levels.

The volume of entrained air must be, % of volume:

3.5±1.5 - for bridge concrete and reinforced concrete structures;

5.5±0.5 - for pavements of the carriageway of bridges.

B.2.8 As a binder in concrete for transport construction, cement according to clause 3 should be used.

B.3 Concrete for hydraulic structures

B.3.1 It is allowed during the construction of massive hydraulic structures to use crushed stone and gravel with a grain size of:

From 120 to 150 mm;

St. 150 mm, introduced directly into the block when laying the concrete mix.

1.0 - for concrete used in the zone of variable water level and surface zone;

2.0 - for concrete used in underwater and inland areas.

B.3.3 For concrete of hydraulic structures operated in the zone of variable water level, the presence of clay in the form of separate lumps in a large aggregate is not allowed.

B.3.4 Grades for crushed stone must be at least 800.

Grades for crushability of gravel and crushed stone from gravel must be at least 1000.

B.3.5 For concrete, to which requirements for frost resistance are imposed, crushed stone from igneous rocks of a crushability grade of at least 1000 should be used.

B.3.6 Crushed stone and gravel for hydrotechnical concrete must have grades for abrasion in the shelf drum not lower than:

I-I - for crushed stone from igneous and metamorphic rocks;

I-II - for crushed stone from sedimentary rocks, as well as crushed stone from gravel.

B.3.8 Frost resistance of crushed stone and gravel for concrete of hydraulic structures should not be lower than that indicated in Table B.6.

Table B.6

Frost resistance of crushed stone and gravel for concrete of hydraulic structures

B.3.9 For hydraulic structures made of concrete with normalized frost resistance F2* 200 and above, operated in conditions of saturation with sea or mineralized water, the volume of air involved in the concrete mix must correspond to that indicated in Table B.7 (concrete grade designation corresponds to the original).

Table B.7

The volume of air involved in the concrete mixture for the concrete of hydraulic structures

B.3.10 For concrete of hydraulic structures, the content of dust-like and clay particles in sand should not exceed, % of the mass:

2 - for concretes of the zone of variable water level;

3 - for concrete of the surface zone;

5 - for concrete of the underwater zone.

The use of fine aggregate containing clay in the form of separate lumps is not allowed.

1 - for concrete of the zone of variable water level;

2 - for concrete of the surface zone;

3 - for concrete of the underwater zone.

B.4 High-strength concrete (class B60 and above)

B.4.1 Technological indicators of the quality of concrete mixes must comply with GOST 7473-2010 and additional requirements of the technological regulations for the production of concrete works or the project for the production of works.

B.4.2 Consumption of cement in high-strength heavy concrete should not exceed 550 kg/m 3 , in high-strength fine-grained concrete - 750 kg/m 3 .

B.4.3 Natural sands with size modulus should be used as fine aggregate Mkp\u003d 2.2 - 3.0, corresponding to the requirements.

B.4.4 Crushed stone from dense rocks of a crushability grade of at least 1000 should be used as a coarse aggregate.

B.4.5 Rules for quality control and assessment - according to GOST 31914-2012.

Bibliography

GN 2.2.5.313-03 Maximum Permissible Concentrations (MPC) of harmful substances in the air of the working area (Probably a mistake in the original. Should be read: GN 2.2.5.1313-03).

GN 2.2.5.314-03 Approximate safe exposure levels (SLI) of harmful substances in the air of the working area (Probably an error in the original. Should read: GN 2.2.5.1314-03. The document is not valid on the territory of the Russian Federation. GN 2.2.5.2308-07 is in force) .

GOST R 55224-2012 Cements for transport construction. Specifications

Working test procedure. Determination of false setting of cement, RM 5730-0284339-01-2003. NIITSEMENT, CEMISKON. Moscow, 2003

Heavy concrete GOST 26633 technical specifications. Concrete is heavy and fine-grained. Requirements for concrete mixtures

1 area of ​​use

2 Normative references

5 Control methods

Annex A (reference)

Annex B (mandatory)

Specifications

Application area

1 area of ​​use

2 Normative references

3 Technical requirements

3.3 Characteristics of concrete

3.4 Requirements for concrete mixtures

3.5 Material requirements for concrete

4 Acceptance rules

5 Control methods

Annex A (informative).

The nature of the possible impact of harmful impurities in aggregates on concrete

Annex B (mandatory).

Additional requirements for concrete intended for various types of construction

Bibliography

1 area of use

Annex A
(reference)

Annex B
(mandatory)

1 area of use