Crushed stone GOST 8267 93 technical conditions. With changes and additions from

GOST 8267-93

INTERSTATE STANDARD

CRUSHED STONE AND GRAVEL
FROM DENSE ROCKS
FOR CONSTRUCTION WORK

TECHNICAL CONDITIONS

INTERSTATE SCIENTIFIC AND TECHNICAL COMMISSION
ON STANDARDIZATION AND TECHNICAL REGULATION
IN CONSTRUCTION

Preface

1 DEVELOPED by the VNIPIIstromsyryo Institute with the participation of VNIIzhelezobeton, NIIZhB, Soyuzdornia Russian Federation

INTRODUCED by Gosstroy Russia

2 ADOPTED by the Interstate Scientific and Technical Commission for Standardization and Technical Regulation in Construction (INTKS) on November 10, 1993.

State name	Name of body government controlled construction
The Republic of Azerbaijan	State Construction Committee of the Azerbaijan Republic
Republic of Armenia	State Architecture of the Republic of Armenia
Republic of Belarus	Gosstroy of the Republic of Belarus
The Republic of Kazakhstan	Ministry of Construction of the Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy of the Kyrgyz Republic
The Republic of Moldova	Ministry of Architecture and Construction of the Republic of Moldova
Russian Federation	Gosstroy of Russia
The Republic of Tajikistan	State Construction Committee of the Republic of Tajikistan
The Republic of Uzbekistan	State Committee for Architecture and Construction of the Republic of Uzbekistan

3 INSTEAD OF GOST 8267-82, GOST 8268-82, GOST 10260-82, GOST 23254-78, GOST 26873-86

4 ENTERED INTO EFFECT on January 1, 1995 as a state standard of the Russian Federation by Decree of the State Construction Committee of Russia dated June 17, 1994 No. 18-43

INTERSTATE STANDARD

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS
FOR CONSTRUCTION WORK

Technicalconditions

Crushed stone and gravel of solid rocks for construction works.
Specifications

dateintroduction 1995-01-01

1 AREA OF USE

This standard applies to crushed stone and gravel from rocks with an average grain density of 2.0 to 3.0 g/cm 3, used as fillers for heavy concrete, as well as for road and other types construction work.

The standard does not apply to crushed stone and gravel for the ballast layer of railway tracks and decorative crushed stone.

The requirements set out in paragraphs -, sections and are mandatory.

2 REGULATORY REFERENCES

This standard uses references to the following standards:

4.2.1 Crushed stone and gravel are produced in the form of the following main fractions: from 5 (3) to 10 mm; St. 10 to 15 mm; St. 10 to 20 mm; St. 15 to 20 mm; St. 20 to 40 mm; St. 40 to 80 (70) mm and mixtures of fractions from 5 (3) to 20 mm.

By agreement between the manufacturer and the consumer, crushed stone and gravel are produced in the form of other fractions, composed of individual fractions, as well as fractions from 80 (70) to 120 mm, St. 120 to 150 mm.

4.2.1.

4.2.2 Complete residues on control sieves when sifting crushed stone and gravel of fractions from 5 (3) to 10 mm, St. 10 to 15 mm; St. 10 to 20 mm, St. 15 to 20 mm; St. 20 to 40 mm, St. 40 to 80 (70) mm and mixtures of fractions from 5 (3) to 20 mm must correspond to those indicated in the table, wheredAnd D- the smallest and largest nominal grain sizes.

Table 1

0,5 (d+ D)

Total residues on sieves, % by weight

From 90 to 100

Notes

1 For crushed stone and gravel of fractions from 5 (3) to 10 mm and a mixture of fractions from 5 (3) to 20 mm, additionally use: lower sieves 2.5 mm (1, 25); the total balance of which should be from 95 to 100%.

2 By agreement between the manufacturer and the consumer, it is allowed to produce crushed stone and gravel with a total sieve residue of 0.5 ( d+ D) from 30 to 80% by weight.

4.2.2. (Amended edition, Rev. No. 3).

4.2.3 For crushed stone and gravel fractions St. 80 (70) to 120 mm and St. 120 to 150 mm, as well as for a mixture of fractions produced by agreement between the manufacturer and the consumer, complete residues on test sieves with a diameterd,D, 1,25 Dmust satisfy those indicated in the table, and the ratio of fractions in the mixtures is established by agreement between the manufacturer and the consumer in accordance with regulatory documents for the use of these mixtures for construction work.

4.2.3. (Changed edition, Amendment No. 3).

4.2.4 Excluded. (Change #3).

4.3 Content of crushed grains in crushed stone from gravel and boulders and grain shape

(Changed edition. Amendment No. 4)

4.3.1 Crushed stone from gravel and boulders must contain crushed grains in an amount of at least 80% by weight. It is allowed, by agreement between the manufacturer and the consumer, to produce crushed stone from gravel containing at least 60% crushed grains.

(Changed edition. Amendment No. 4)

4.3.2 The shape of crushed stone and gravel grains is characterized by the content of lamellar (flaky) and needle-shaped grains.

Crushed stone, depending on the content of lamellar and needle-shaped grains, is divided into five groups, which must correspond to those indicated in the table.

table 2

Percentage by weight

4.3.2. (Changed edition, Amendment No. 3).

4.3.3 Gravel should not contain lamellar and needle-shaped grains of more than 35% by weight.

4.4Strength

4.4.1 The strength of crushed stone and gravel is characterized by the grade according to its crushability when compressed (crushed) in a cylinder.

Crushed stone and gravel intended for construction highways, are characterized by a grade based on crushability during compression (crushing) in a cylinder and a grade based on abrasion, determined by testing in a shelf drum.

(Changed edition. Amendment No. 4)

4.4.2 Grades for crushability of crushed stone from sedimentary and metamorphic rocks must comply with the requirements specified in the table, and grades for crushability of crushed stone from igneous rocks - in the table.

Table 3

	Weight loss when testing crushed stone, %
	dry	saturated with water
	Up to 11 incl.	Up to 11 incl.
	St. 11 to 13	St. 11 to 13

Table 4

	Mass loss when testing crushed stone, %
	from intrusive rocks	from effusive rocks
	Up to 12 incl.	Up to 9 incl.
	St. 12 to 16

It is allowed to determine the grade of crushed stone from sedimentary and metamorphic rocks both in a dry and in a water-saturated state.

If the grades do not match in terms of crushability, the strength is assessed based on the test results in a water-saturated state.

Grades for crushability of crushed stone made from grace and grace must meet the requirements specified in the table.

Table 5

	Weight loss during testing,%
	crushed gravel
	Up to 10 incl.	Up to 8 incl.
	St. 10 to 14

To establish the grade for crushability of crushed stone from boulders, consisting of rocks of different genetic types, an intermediate grade for crushability is determined according to GOST 8269.0 as a weighted average of the grades obtained separately for crushed stone of these types of rocks, taking into account their content in crushed stone from boulders. Based on the weighted average grade, the grade is determined according to the crushability of crushed stone from boulders according to Table 5a.

Table 5a

Intermediate weighted average grade by crushability of crushed stone from boulders	Grade for crushability of crushed stone from boulders
1200 and above	1200
St. 1000 to 1200	1000
St. 800 to 1000
St. 600 to 800
St. 400 to 600
St. 300 to 400

(Changed edition. Amendment No. 4)

4.4.3 The abrasion grades of crushed stone and gravel must meet the requirements specified in the table.

Table 6

	Weight loss during testing,%

	Up to 25 incl.	Up to 20 incl.
	St. 25 to 35	St. 20 to 30

4.5 Content of weak rock grains

Table 7

Percentage by weight


Crushed stone from igneous, metamorphic and sedimentary rocks of the world:
1400; 1200; 1000


Crushed stone from gravel and boulders and gravel grades:

4.6 Frost resistance

4.6.1 Frost resistance of crushed stone and gravel is characterized by the number of freezing and thawing cycles, during which the percentage loss by weight of crushed stone and gravel does not exceed the established values.

It is possible to evaluate the frost resistance of crushed stone and gravel by the number of cycles of saturation in a solution of sodium sulfate and drying. If the brands do not match, frost resistance is assessed based on the results of the freezing and thawing test.

4.6.2 Crushed stone and gravel are divided into the following grades based on frost resistance: F 15; F 25; F 50; F 100; F 150; F 200; F 300; F 400.

The frost resistance indicators of crushed stone and gravel when tested by freezing and thawing or saturation in a solution of sodium sulfate and drying must correspond to those indicated in the table.

Table 8

	Frost resistance grade for crushed stone and gravel

Freezing - thawing: number of cycles

Saturation in sodium sulfate solution - drying: number of cycles
weight loss after testing,%, no more

4.7 Content of dust and clay particles

4.7.1 The content of dust and clay particles (less than 0.05 mm in size) in crushed stone and gravel, depending on the type of rock and grade of crushability, must correspond to that indicated in the table.

Table 9

Type of rock and grade for crushability of crushed stone and gravel
Crushed stone from igneous and metamorphic rocks grades:
St. 800
St. 600 to 800 incl.
Crushed stone from sedimentary rocks grades:
from 600 to 1200 incl.
200, 400
Crushed gravel and gravel grades:
1000



Crushed stone from boulders brands:
1200
1000

(Changed edition. Amendment No. 4)

Table 10

Grade for crushability of crushed stone and gravel
Crushed stone from igneous, sedimentary and metamorphic rocks grades:


Crushed gravel and gravel grades: 1000, 800, 600, 400
Crushed stone from boulders grades: 1200, 1000, 800, 600

(Changed edition. Amendment No. 4)

4.8Presence of harmful components and impurities

4.8.1 Crushed stone from incidentally mined overburden and host rocks and substandard waste from mining enterprises for processing ores (ferrous, non-ferrous and rare metals metallurgical industry) and non-metallic minerals of other industries must be resistant to all types of decay.

The stability of the crushed stone structure against all types of decay must meet the requirements specified in the table.

Table 11

4.8.2 Crushed stone and gravel must be resistant to impact environment. Crushed stone and gravel intended for use as aggregates for concrete must be resistant to the chemical effects of cement alkalis.

The durability of crushed stone and gravel is determined by the mineralogical and petrographic composition of the original rock and the content of harmful components and impurities that reduce the durability of concrete and cause corrosion of reinforcement reinforced concrete products and designs.

The list of harmful components and their maximum permissible content is given in the Appendix.

At A eff up to 370 Bq/kg - in newly built residential buildings public buildings;

At A eff St. 370 to 740 Bq/kg - for road construction within the territory of settlements and areas of prospective development, as well as during the construction industrial buildings and structures;

At A eff St. 740 to 1500 Bq/kg - in road construction outside populated areas.

If necessary, in national standards in force on the territory of the state, the value of the specific effective activity of natural radionuclides can be changed within the limits specified above.

(Changed edition. Amendment No. 1, 2).

4.10 Crushed stone and gravel must not contain foreign contaminants.

4.11 Provision of the standard values of crushed stone and gravel quality indicators in terms of grain composition (content of grains smaller than the smallest nominal sized D) and the content of dust and clay particles should be at least 95%.

5 ACCEPTANCE RULES

5.1 Crushed stone and gravel must be accepted by the technical control of the manufacturer.

5.2 Acceptance and delivery of crushed stone and gravel is carried out in batches. A batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions), established in the supply contract and simultaneously shipped to one consumer in one train or one vessel. Upon shipment by car A batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions) shipped to one consumer during the day.

5.3 To verify compliance of the quality of crushed stone (gravel) with the requirements of this standard, acceptance control and periodic tests are carried out.

Acceptance control at the manufacturer is carried out daily by testing a combined sample of crushed stone (gravel) taken from each production line. During acceptance control the following is determined:

Grain composition;

5.4 During periodic tests, determine:

Once every 10 days - the content of lamellar and needle-shaped grains and the content of crushed grains in crushed stone from gravel and boulders and the content of free asbestos fiber in crushed stone from asbestos-containing rocks;

Once a quarter - strength and bulk density, stability of the structure against decay;

Once a year - frost resistance and class of crushed stone (gravel) according to the specific effective activity of natural radionuclides, as well as the content of harmful components and impurities at the request of consumers.

The value of the specific effective activity of natural radionuclides is determined, and the class of crushed stone and gravel is established in specialized laboratories certified in in the prescribed manner gamma spectrometric installations or in radiation metric laboratories of supervisory authorities.

In the absence of geological survey data on radiation-hygienic assessment of the deposit and a conclusion on the class of crushed stone and gravel, the manufacturer carries out a preliminary assessment of the developed rock sections directly in the quarry or crushed stone (gravel) in the warehouse finished products in accordance with GOST 30108.

The strength, frost resistance of crushed stone and gravel, as well as the stability of the structure of crushed stone against all types of decay are determined in each case by changes in the properties of the feedstock (rock, associated rocks and waste industrial production).

In the absence of geological survey data on the content of harmful components and impurities, the enterprise conducts tests in specialized or accredited laboratories and centers to determine the content of reactive rocks in products, the content of weak grains and metal impurities in crushed stone from slags of ferrous and non-ferrous metallurgy, the activity of slags and electrical insulating materials. properties of crushed stone for the ballast layer of railway tracks.

(Changed edition. Amendment No. 4)

5.5 Sampling and preparation of crushed stone (gravel) samples for quality control at the manufacturer is carried out in accordance with the requirements of GOST 8269.0, GOST 8269.1.

Control points for preliminary assessment of rocks and the class of crushed stone and gravel are selected according to GOST 30108.

(Changed edition. Amendment No. 2).

5.6 When checking the compliance of crushed stone (gravel) with the requirements of this standard, the consumer must use the sampling procedure given in paragraph -.

up to 350 m 3 ................................................... ........... 10

St. 350 to 700 m 3 ............................................... 15

» 700 m 3 ................................................... ............ 20

From the spot samples, a combined sample is formed that characterizes the controlled batch. Averaging, reduction and sample preparation for testing are carried out in accordance with GOST 8269.0, GOST 8269.1.

(Changed edition. Amendment No. 2).

5.8 To control the quality of crushed stone and gravel supplied by rail, spot samples are taken when unloading cars from the flow of crushed stone (gravel) on belt conveyors used to transport it to the consumer’s warehouse. When unloading each wagon being tested, five spot samples are taken at equal time intervals. The number of cars is determined taking into account the receipt of the required number of spot samples according to 5.8. The cars are selected according to the instructions of the consumer. If the batch consists of one wagon, five spot samples are taken during unloading, from which a combined sample is obtained.

If conveyor transport is not used when unloading wagons, then spot samples are taken directly from the wagons. To do this, the surface of the crushed stone (gravel) in the car is leveled and holes with a depth of 0.2-0.4 m are opened at the sampling points. The sampling points should be located in the center and in the four corners of the car, and the distance from the sides of the car to the sampling points should be be at least 0.5 m. Crushed stone samples are taken from the holes with a scoop, moving it from bottom to top along the wall of the hole.

5.9 To control the quality of crushed stone (gravel) supplied by water transport, spot samples are taken when unloading ships.

When used for unloading belt conveyors, point samples are taken at regular intervals from the flow of crushed stone (gravel) on the conveyors. When unloading ships with grab cranes, point samples are taken with a scoop at regular intervals as unloading proceeds directly from the newly formed surface of crushed stone (gravel) in the ship, and not from holes.

If belt conveyors are used for unloading crushed stone (gravel), point samples are taken from the flow of crushed stone on the conveyors. When unloading each vehicle, one spot sample is taken. The number of cars is taken into account obtaining the required number of spot samples according to 5.7. Cars are selected according to the consumer's instructions.

If the batch consists of less than ten cars, then crushed stone samples are taken from each car.

If conveyor transport is not used when unloading cars, spot samples are taken directly from the cars. To do this, the surface of the crushed stone (gravel) in the car is leveled, a hole 0.2-0.4 m deep is opened in the center of the body. A sample of crushed stone (gravel) is taken from the hole with a scoop, moving it from bottom to top along the hole.

5.11 The quantity of crushed stone (gravel) supplied is determined by volume or weight. Measurement of crushed stone (gravel) is carried out in carriages and cars.

Crushed stone (gravel) shipped in wagons or cars is weighed on railway or truck scales. The mass of crushed stone (gravel) shipped in ships is determined by the vessel's draft. The amount of crushed stone (gravel) from units of mass to units of volume is recalculated according to the value of the bulk density of crushed stone (gravel), determined by its moisture content during shipment.

The volume of crushed stone (gravel) supplied in a carriage or car is determined by its measurement, the resulting volume is multiplied by the compaction coefficient of crushed stone (gravel) during transportation, which depends on the loading method, transportation distance, and grain composition. Maximum permissible value humidity and compaction coefficient, which should not exceed 1.10, are established in the supply contract.

5.13 Results of acceptance inspection and periodic testing are provided in the quality document, which indicates:

Name of the manufacturer and its address;

Number and date of issue of the document;

Name and address of the consumer;

Batch number and amount of crushed stone (gravel);

Car number or vessel number and invoice numbers;

- grain composition of crushed stone (gravel);

Brand of crushed stone (gravel) by strength (crudibility);

Frost resistance of crushed stone (gravel);

Bulk density of crushed stone (gravel);

Specific effective activity of natural radionuclides of crushed stone (gravel);

Stability of the crushed stone structure against decay;

Designation of this standard.

In addition, at the request of the consumer, the document indicates the mineralogical and petrographic characteristics of the gravel and rock from which crushed stone is produced, as well as the true and average density, porosity, hollowness and water absorption.

(Changed edition. Amendment No. 2).

6.2 The stability of the crushed stone structure against all types of decay is determined according to GOST 8269.0.

(Changed edition. Amendment No. 2).

6.3 The specific effective activity of natural radionuclides in crushed stone and gravel is determined by the gamma spectrometric method according to GOST 30108.

6.4 Ensuring the content of grains smaller than the smallest nominal size in crushed stone and gravel established by the standarddand more of the largest nominal size D and the content of dust and clay particles is characterized by the ratio of the number of replaceable samples, the quality indicators of which exceed standard values, To total number replacement samples collected and tested within one quarter.

7 TRANSPORTATION AND STORAGE

7.1 Crushed stone and gravel are transported in bulk to vehicles any saw in accordance with the current rules for the transportation of goods and technical conditions for loading and securing goods, approved by the Ministry of Railways, rules for the transportation of goods by road and water transport.

When transporting crushed stone and gravel by rail, wagons should be loaded taking into account the full use of their carrying capacity.

7.2 Crushed stone and gravel are stored separately into fractions and mixtures of fractions under conditions that protect them from clogging and contamination.

APPENDIX A

(required)

CONTENT OF HARMFUL COMPONENTS AND IMPURITIES

1 The main components that reduce the strength and durability of concrete include inclusions:

Clay minerals (montmorillonite, kaolinite, etc.);

Mica and hydromicas and other layered silicates;

Asbestos;

Organic substances(coal, lignite, oil shale, humic acids, etc.);

Minerals that are unstable to weathering processes (chlorite, apatite zeolite, nepheline, phosphorite).

2 The main components causing deterioration of surface quality and internal corrosion of concrete include inclusions:

Rocks and minerals containing amorphous varieties of silicon dioxide (chalcedony, opal, etc.);

Sulfur-containing rocks and minerals (pyrite, marcasite, pyrrhotite and other sulfides, as well as gypsum, anhydrite and other sulfates);

Rocks and minerals containing iron oxides and hydroxides (magnetite, goethite, etc.);

Mica, gillic mica and other layered silicates.

3 The main components that cause corrosion of reinforcement in concrete include inclusions:

Halogen-containing minerals (pyrite, marcasite, pyrrhotite and other sulfides, gypsum, anhydrite and other sulfates).

4 Crushed stone and gravel are used in concrete without restrictions, if the content of rocks and minerals classified as harmful components is no more than:

50 mmol/l of amorphous varieties of silicon dioxide, soluble in alkalis;

1.5% by weight of sulfates (gypsum, anhydrite) and sulfides, except pyrite (marcasite, pyrrhotite, gypsum, anhydrite, etc.) and calculated in SO 3;

4% by weight pyrite;

15% by volume of layered silicates, if micas, hydromicas, chlorites and others are rock-forming minerals;

0.1% by weight of halogen compounds (halite, sylvite, etc., including water-soluble chlorides) calculated as chlorine ion;

0.25% by weight of free asbestos fibers;

1.0% by weight of coal and wood residues;

10% by volume of each of the listed rock-forming minerals (magnetite, goethite, hematite, etc., apatite, nepheline, phosphorite) or their sum in an amount of no more than 15%.

APPENDIX B

Deleted (Change No. 2)

Keywords:crushed stone, crushed rock, gravel, crushed gravel, construction work

The compaction coefficient of crushed stone is a special standard number, which is precisely determined in GOST 8267 93.

This parameter indicates how many times it is allowed to compact the building material and reduce its external volume during transportation. Typically, the value is between 1.05 and 1.50.

According to the standards, the following coefficients are distinguished for each type of crushed stone:

1.2 (PGS);
1.15 (expanded clay);
1.1 (crushed gravel).

Definition of quality

Measurements for each fraction are carried out directly on the construction site. The results obtained are recorded and compared with GOST standards. Choice suitable material for the production of concrete solutions, laying cushions under asphalt roads and creating drainage systems is due to its technical characteristics. A test to calculate the compaction coefficient involves immersing a density meter in a mixture of crushed stone.

Building materials are divided into types not only by fractions, but also by the original rock from which crushed stone is produced. The frost resistance grade determines the number of freezing and thawing cycles. The crushability of crushed stone helps determine its strength. If you influence some parameters, you can get universal material for each type of construction work.

Bulk density and flakiness are important characteristics, defining the scope of application of the material. Crushed stone should ideally not contain needle-shaped or lamellar-shaped grains anymore established standards. Based on the type of raw material, the following types of crushed stone are distinguished:

Areas of use

It is used in the following cases:

preparation of concrete solutions;
pouring the foundation and reinforced concrete structures;
for drainage or road cushioning;
crushed stone decorative look(rubble stone) is indispensable if it is necessary to design the landscape of a site.

Specifications

Such material is of inorganic origin, and its individual grains must exceed 5 mm in diameter. Crushed stone is produced in the following fractions:

5-10 mm;
10-20 mm;
15-20 mm;
20-40 mm;
40-80 mm.

High-quality crushed stone should be produced only in accordance with international standards.

The compaction coefficient of crushed stone depends on many characteristics. The average density can be from 1.5 to 3 g/cm3. The following indicators are taken into account:

flakiness (determines how flat the material will be);
frost resistance;
sorting by fractions;
radioactivity.

Such technical characteristics allow you to choose suitable look crushed stone for a certain type of construction work. By influencing certain indicators, you can significantly change the structure of crushed stone and create the type necessary for each individual case. Bulk density must comply with GOST 8267-93. Frost resistance is indicated by the Latin letter F, for example, F300, which means the ability to withstand 300 cycles of freezing and thawing. The crushability of crushed stone is also determined by grade. All indicators must correspond to the indicators of GOST tables.

The building material undergoes appropriate tests, so you can be confident in its quality. Each parameter is important for application in various fields. Crushed stone with greater flakiness is better to choose for concrete mortar for pouring the foundation. Material with low frost resistance cannot be used for construction work in regions with cold climates. The following brands are distinguished according to frost resistance:

F 15;
F 25;
F 50;
F 100;
F 150;
F 200;
F 300;
F 400.

If, after testing, the obtained indicators comply with GOST, then crushed stone can be used for high-quality concrete solutions.

INTERSTATE STANDARD

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS FOR CONSTRUCTION WORKS
GOST 8267-93
Specifications

Crushed stone and gravel of solid rocks for construction works. Specifications

MKS 91.100.15

OKSTU 5711

Date of introduction 1995-01-01

Preface

1 DEVELOPED by the VNIPIIstromsyryo Institute with the participation of VNIIzhelezobeton, NIIZhB, SoyuzDorNII of the Russian Federation

INTRODUCED by the State Construction Committee of Russia

2 ADOPTED by the Interstate Scientific and Technical Commission for Standardization and Technical Regulation in Construction (INTKS) on November 10, 1993.


State name
The Republic of Azerbaijan
Republic of Armenia	State Architecture of the Republic of Armenia
Republic of Belarus	Gosstroy of the Republic of Belarus
The Republic of Kazakhstan	Ministry of Construction of the Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy of the Kyrgyz Republic
The Republic of Moldova	Ministry of Architecture and Construction of the Republic of Moldova
Russian Federation	Gosstroy of Russia
The Republic of Tajikistan
The Republic of Uzbekistan

Change N 1 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (INTKS) on December 10, 1997


State name	Name of the state construction management body
The Republic of Azerbaijan	State Construction Committee of the Azerbaijan Republic
Republic of Armenia
The Republic of Kazakhstan	Agency for Construction and Architectural and Urban Planning Control of the Ministry of Economy and Trade of the Republic of Kazakhstan
Republic of Kyrgyzstan	Ministry of Architecture and Construction of the Kyrgyz Republic
Russian Federation	Gosstroy of Russia
The Republic of Tajikistan	State Construction Committee of the Republic of Tajikistan

Change N 2 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (MNTKS) 05/17/2000

Change N 3 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (MNTKS) 04/24/2002

For accepting changes N 2 and 3 voted:


State name	Name of the state construction management body
The Republic of Azerbaijan	State Construction Committee of the Azerbaijan Republic
Republic of Armenia	Ministry of Urban Development of the Republic of Armenia
Republic of Belarus	Ministry of Construction and Architecture of the Republic of Belarus
The Republic of Kazakhstan	Kazconstruction Committee of the Republic of Kazakhstan
Republic of Kyrgyzstan	State Commission for Architecture and Construction under the Government of the Kyrgyz Republic
The Republic of Moldova	Ministry of Ecology, Construction and Territorial Development of the Republic of Moldova
Russian Federation	Gosstroy of Russia
The Republic of Tajikistan	Komarchstroy of the Republic of Tajikistan
The Republic of Uzbekistan	State Committee for Architecture and Construction of the Republic of Uzbekistan

3 ENTERED INTO EFFECT on January 1, 1995 as state standard Russian Federation by Decree of the State Construction Committee of Russia dated June 17, 1994 N 18-43

4 IN REPLACE GOST 8267-82, GOST 8268-82, GOST 10260-82, GOST 23254-78, GOST 26873-86

5th EDITION (December 2003) with Changes N 1 , 2 , 3 adopted in February 1998, January 2000, June 2002 (IUS 5-98, 5-2001, 10-2002)

Reprint (as of April 2008)

AMENDED Change No. 4 , approved and put into effect By order Federal agency on technical regulation and metrology dated 04/02/2009 N 119-st from 01.09.2009

Change No. 4 was made by the database manufacturer according to the text of IUS No. 6, 2009

1 area of use

This standard applies to crushed stone and gravel from rocks with an average grain density of 2.0 to 3.0 g/cm, used as fillers for heavy concrete, as well as for road and other types of construction work.

The standard does not apply to crushed stone and gravel for the ballast layer of railway tracks and decorative crushed stone.

The requirements set out in paragraphs 4.2-4.9, sections 5 and 6 are mandatory.

2 Normative references

This standard uses references to the following standards:

GOST 8269.0-97 Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of physical and mechanical tests

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

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

(Changed edition, Change N 2).

3 Definitions

The following terms are used in this standard.

3.1 crushed rocks: Inorganic granular bulk material with grains of coarseness. 5 mm, obtained by crushing rocks, gravel and boulders, incidentally mined overburden and host rocks or substandard waste from mining enterprises for processing ores (ferrous, non-ferrous and rare metals of the metallurgical industry) and non-metallic minerals from other industries and subsequent sieving of crushed products.

3.2 rock gravel: Inorganic granular bulk material with grains of coarseness. 5 mm, obtained by sieving natural gravel-sand mixtures.

4 Technical requirements

4.1 Crushed stone and gravel must be manufactured in accordance with the requirements of this standard according to technological documentation approved by the manufacturer.

4.2. Main parameters and dimensions

4.2.1 Crushed stone and gravel are produced in the form of the following main fractions: from 5(3) to 10 mm; St. 10 to 15 mm; St. 10 to 20 mm; St. 15 to 20 mm; St. 20 to 40 mm; St. 40 to 80(70) mm and mixtures of fractions from 5(3) to 20 mm.

By agreement between the manufacturer and the consumer, crushed stone and gravel are produced in the form of other mixtures composed of individual fractions, as well as fractions from 80 (70) to 120 mm, St. 120 to 150 mm.

4.2.2 Complete residues on control sieves when sifting crushed stone and gravel of fractions from 5(3) to 10 mm, St. 10 to 15 mm, St. 10 to 20 mm, St. 15 to 20 mm, St. 20 to 40 mm, St. 40 to 80(70) mm and mixtures of fractions from 5(3) to 20 mm must correspond to those indicated in table 1, where d And D- the smallest and largest nominal grain sizes.

Table 1


Diameter of test sieves holes, mm		0,5(d+D)		1,25 D
Total residues on sieves, % by weight	From 90 to 100	From 30 to 60	To 10	Up to 0.5
Notes 1 For crushed stone and gravel of fractions from 5(3) to 10 mm and a mixture of fractions from 5(3) to 20 mm, additionally use: lower sieves 2.5 mm (1.25 mm), the total residue on which should be from 95% up to 100%. 2 By agreement between the manufacturer and the consumer, it is allowed to produce crushed stone and gravel with a complete sieve residue of 0.5( d+ D) from 30% to 80% by weight.

4.2.3 For crushed stone and gravel fractions St. 80(70) to 120 mm and St. 120 to 150 mm, as well as for a mixture of fractions produced by agreement between the manufacturer and the consumer, complete residues on test sieves with a diameter of d, D, 1,25 Dmust satisfy those indicated in table 1, and the ratio of fractions in mixtures is established by agreement between the manufacturer and the consumer in accordance with regulatory documents for the use of these mixtures for construction work.

4.2.1-4.2.3 (Changed edition, Amendment No. 3).

4.2.4 (Deleted, Amendment No. 3).

(Changed edition, Change N 4).

4.3.2 The shape of crushed stone and gravel grains is characterized by the content of lamellar (flaky) and needle-shaped grains.

Crushed stone, depending on the content of lamellar and needle-shaped grains, is divided into five groups, which must correspond to those indicated in Table 2.

table 2


Crushed stone group
		Up to 10 incl.
		St. 10 to 15 incl.
		" 15 " 25 "
		Over 25 to 35 inclusive.
		" 35 " 50 "
Note - By agreement between the manufacturer and the consumer, it is allowed to produce crushed stone from igneous rocks containing St. 50%, but not more than 65% of grains are lamellar (flaky) and needle-shaped.

(Changed edition, Amendment No. 3).

4.3.3 Gravel should not contain lamellar and needle-shaped grains of more than 35% by weight.

4.4 Durability

4.4.1 The strength of crushed stone and gravel is characterized by the grade according to its crushability when compressed (crushed) in a cylinder.

Crushed stone and gravel intended for the construction of highways are characterized by a grade based on crushability when compressed (crushed) in a cylinder and a grade based on abrasion, determined by testing in a shelf drum.

4.4.2 Grades for crushability of crushed stone from sedimentary and metamorphic rocks must comply with the requirements specified in Table 3, and grades for crushability of crushed stone from igneous rocks - in Table 4.

Table 3


Grade for crushability of crushed stone from sedimentary and metamorphic rocks
	dry	saturated with water
1200	Up to 11 incl.	Up to 11 incl.
1000	St. 11 to 13	St. 11 to 13
	" 13 " 15	" 13 " 15
	" 15 " 19	" 15 " 20
	" 19 " 24	" 20 " 28
	" 24 " 28	" 28 " 38
	" 28 " 35	" 38 " 54

Table 4


Grade for crushability of crushed stone from igneous rocks	Weight loss when testing crushed stone, %
	from intrusive rocks	from effusive rocks
1400	Up to 12 incl.	Up to 9 incl.
1200	St. 12 to 16	St. 9 to 11
1000	" 16 " 20	" 11 " 13
	" 20 " 25	" 13 " 15
	" 25 " 34	" 15 " 20

It is allowed to determine the grade of crushed stone from sedimentary and metamorphic rocks both in a dry and in a water-saturated state.

If the grades do not match in terms of crushability, the strength is assessed based on the test results in a water-saturated state.

The crushability grades of crushed stone and gravel must meet the requirements specified in Table 5.

Table 5


Grade for crushability of crushed stone and gravel
	crushed gravel	gravel
1000	Up to 10 incl.	Up to 8 incl.
	St. 10 to 14	St. 8 to 12
	" 14 " 18	" 12 " 16
	" 18 " 26	" 16 " 24

To establish the crushability grade of crushed stone from boulders, consisting of rocks of different genetic types, it is determined by GOST 8269.0 an intermediate grade for crushability as a weighted average of grades obtained separately for crushed stone of these types of rocks, taking into account their content in crushed stone from boulders. Based on the weighted average grade, the grade is determined according to the crushability of crushed stone from boulders according to Table 5a.

Table 5a


Intermediate weighted average grade for crushability of crushed stone from boulders	Grade for crushability of crushed stone from boulders
1200 and above	1200
St. 1000 to 1200	1000
St. 800 to 1000
St. 600 to 800
St. 400 to 600
St. 300 to 400

4.4.1, 4.4.2 (Changed edition, Change N 4).

4.4.3 Abrasion grades of crushed stone and gravel must meet the requirements specified in Table 6.

Table 6


Grade for abrasion of crushed stone and gravel	Weight loss during testing,%
	crushed stone	gravel
	Up to 25 incl.	Up to 20 incl.
	St. 25 to 35	St. 20 to 30
	" 35 " 45	" 30 " 40
	" 45 " 60	" 40 " 40*

Table 7



	Crushed stone from igneous, metamorphic and sedimentary rocks grades:
	1400; 1200; 1000
	800; 600; 400

	Crushed stone from gravel and boulders and gravel grades:
	1000; 800; 600

4.6 Frost resistance

4.6.2 Crushed stone and gravel are divided into the following grades based on frost resistance: F15, F25, F50, F100, F150, F200, F300, F400.

The frost resistance indicators of crushed stone and gravel when tested by freezing and thawing or saturation in a solution of sodium sulfate and drying must correspond to those indicated in Table 8.

Table 8


Type of test	Frost resistance grade for crushed stone and gravel
		F100	F150	F200	F300	F400
Freeze-thaw:
Number of cycles

Saturation in sodium sulfate solution - drying:
Number of cycles
Weight loss after testing, %, no more

Table 9


Type of rock and grade for crushability of crushed stone and gravel
Crushed stone from igneous and metamorphic rocks grades:
St. 800
St. 600 to 800 incl.
Crushed stone from sedimentary rocks grades:
from 600 to 1200 incl.
200, 400

1000



Crushed stone from boulders brands:
1200
1000

(Changed edition, Change N 4).

4.7.2 The clay content in lumps should not exceed that specified in Table 10.

Table 10


Grade for crushability of crushed stone and gravel
Crushed stone from igneous, sedimentary and metamorphic rocks grades:
400 and above	0,25
300, 200
Crushed gravel and gravel grades:
1000, 800, 600, 400	0,25
Crushed stone from boulders brands:
1200, 1000, 800, 600	0,25

(Changed edition, Change N 4).

4.8 Presence of harmful components and impurities

4.8.1 Crushed stone from incidentally mined overburden and host rocks and substandard waste from mining enterprises for processing ores (ferrous, non-ferrous and rare metals of the metallurgical industry) and non-metallic minerals from other industries must be resistant to all types of decay.

The stability of the crushed stone structure against all types of decay must meet the requirements specified in Table 11.

Table 11

4.8.2 Crushed stone and gravel must be resistant to environmental influences. Crushed stone and gravel intended for use as aggregates for concrete must be resistant to the chemical effects of cement alkalis.

The durability of crushed stone and gravel is determined by the mineralogical and petrographic composition of the original rock and the content of harmful components and impurities that reduce the durability of concrete and cause corrosion of the reinforcement of reinforced concrete products and structures.

The list of harmful components and their maximum permissible contents are given in Appendix A.

4.9 When producing crushed stone and gravel, their radiation-hygienic assessment must be carried out, based on the results of which the scope of application is determined. Crushed stone and gravel depending on the values of the total specific effective activity of natural radionuclides And eff is used:

At A eff up to 370 Bq/kg - in newly constructed residential and public buildings;

At A eff St. 370 to 740 Bq/kg - for road construction within the territory of settlements and areas of prospective development, as well as during the construction of industrial buildings and structures;

At A eff St. 740 to 1500 Bq/kg - in road construction outside populated areas.

If necessary, in national standards in force on the territory of the state, the value of the specific effective activity of natural radionuclides can be changed within the limits specified above.

(Changed edition, Amendment No. 1, 2).

4.10 Crushed stone and gravel must not contain foreign contaminants.

4.11 Provision of the standard values of crushed stone and gravel quality indicators in terms of grain composition (content of grains smaller than the smallest nominal size d D) and the content of dust and clay particles should be at least 95%.

5 Acceptance rules

5.1 Crushed stone and gravel must be accepted by the technical control of the manufacturer.

5.2 Acceptance and delivery of crushed stone and gravel is carried out in batches. A batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions), established in the supply contract and simultaneously shipped to one consumer in one train or one vessel. When shipping by road, a batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions) shipped to one consumer during the day.

5.3 To verify compliance of the quality of crushed stone (gravel) with the requirements of this standard, acceptance control and periodic tests are carried out.

Grain composition;

5.4 During periodic tests, determine:

Once a quarter - strength and bulk density, stability of the structure against decay;

The value of the specific effective activity of natural radionuclides is determined, and the class of crushed stone and gravel is established in specialized laboratories on gamma spectrometric installations certified in the prescribed manner or in radiation metric laboratories of supervisory authorities.

In the absence of geological survey data on radiation-hygienic assessment of the deposit and a conclusion on the class of crushed stone and gravel, the manufacturer carries out a preliminary assessment of the developed rock sections directly in the quarry or crushed stone (gravel) in the finished product warehouse in accordance with GOST 30108.

In the absence of geological survey data on the content of harmful components and impurities, the enterprise conducts tests in specialized or accredited laboratories and centers to determine the content of reactive rocks in products, the content of weak grains and metal impurities in crushed stone from the slag of ferrous and non-ferrous metallurgy, the activity of slag and the electrical insulating properties of crushed stone for the ballast layer of railway tracks.

(Changed edition, Rev. N 2 , 4 ).

5.5 Sampling and preparation of crushed stone (gravel) samples for quality control at the manufacturer is carried out in accordance with the requirements

Control points for preliminary assessment of rocks and the class of crushed stone and gravel are selected according to GOST 30108.

(Changed edition, Change N 2).

5.6 When checking the compliance of crushed stone (gravel) with the requirements of this standard, the consumer must apply the sampling procedure given in 5.7-5.10.

5.7 The number of spot samples taken by the consumer to control the quality of crushed stone (gravel) in each batch, depending on the volume of the batch, must be at least:

From the spot samples, a combined sample is formed that characterizes the controlled batch. Averaging, reduction and sample preparation for testing are carried out according to GOST 8269.0, GOST 8269.1.

(Changed edition, Change N 2).

5.9 To control the quality of crushed stone (gravel) supplied by water transport, spot samples are taken when unloading ships.

5.10 To control the quality of crushed stone (gravel) shipped by road, spot samples are taken when unloading vehicles.

If the batch consists of less than 10 cars, then crushed stone samples are taken from each car.

5.11 The quantity of crushed stone (gravel) supplied is determined by volume or weight. Measurement of crushed stone (gravel) is carried out in carriages and cars.

The volume of crushed stone (gravel) supplied in a carriage or car is determined by its measurement, the resulting volume is multiplied by the compaction coefficient of crushed stone (gravel) during transportation, which depends on the loading method, transportation distance, and grain composition. The maximum permissible value of humidity and compaction coefficient, which should not exceed 1.10, is established in the supply contract.

5.12 The results of acceptance inspection and periodic testing are presented in a quality document, which indicates:

Name of the manufacturer and its address;

Number and date of issue of the document;

Name and address of the consumer;

Batch number and amount of crushed stone (gravel);

Car number or vessel number and invoice numbers;

Grain composition of crushed stone (gravel);

Brand of crushed stone (gravel) by strength (crudibility);

Frost resistance of crushed stone (gravel);

Bulk density of crushed stone (gravel);

Specific effective activity of natural radionuclides of crushed stone (gravel);

Stability of the crushed stone structure against decay;

Designation of this standard.

(Changed edition, Change N 4).

6 Control methods

6.1 Tests of crushed stone and gravel are carried out according to GOST 8269.0, GOST 8269.1.

When determining the grain composition of crushed stone and gravel, it is allowed to use a sieve with 70 mm holes before equipping enterprises with sieves with 80 mm holes.

6.2 The stability of the crushed stone structure against all types of decay is determined by GOST 8269.0.

6.1, 6.2 (Changed edition, Change N 2).

6.3 The specific effective activity of natural radionuclides in crushed stone and gravel is determined by the gamma spectrometric method according to GOST 30108.

6.4 Ensuring the content of grains smaller than the smallest nominal size in crushed stone and gravel established by the standard dand more of the largest nominal size Dand the content of dust and clay particles is characterized by the ratio of the number of replacement samples, the quality indicators of which exceed standard values, to the total number of replacement samples taken and tested during one quarter.

7 Transportation and storage

7.1 Crushed stone and gravel are transported in bulk in vehicles of any type in accordance with current rules transportation of goods and technical conditions for loading and securing cargo*, approved by the Ministry of Railways, rules for the transportation of goods by road and water transport.

*Probably an error in the original. Should read: "Technical conditions for loading and securing cargo". - Database manufacturer's note.

When transporting crushed stone and gravel by rail, wagons should be loaded taking into account full use their carrying capacity.

7.2 Crushed stone and gravel are stored separately into fractions and mixtures of fractions under conditions that protect them from clogging and contamination.

APPENDIX A
(required)

Content of harmful components and impurities

1 The main components that reduce the strength and durability of concrete include inclusions:

Clay minerals (montmorillonite, kaolinite, etc.);

Mica and hydromicas and other layered silicates;

Asbestos;

Organic substances (coal, lignite, oil shale, humic acids, etc.);

Minerals that are unstable to weathering processes (chlorite, zeolite, apatite, nepheline, phosphorite).

2 The main components causing deterioration of surface quality and internal corrosion of concrete include inclusions:

Rocks and minerals containing amorphous varieties of silicon dioxide (chalcedony, opal, etc.);

Sulfur-containing rocks and minerals (pyrite, marcasite, pyrrhotite and other sulfides, as well as gypsum, anhydrite and other sulfates);

Rocks and minerals containing iron oxides and hydroxides (magnetite, goethite, etc.);

Mica, hydromicas and other layered silicates.

3 The main components that cause corrosion of reinforcement in concrete include inclusions of halogen-containing minerals (pyrite, marcasite, pyrrhotite and other sulfides, gypsum, anhydrite and other sulfates).

4 Crushed stone and gravel are used in concrete without restrictions, if the content of rocks and minerals classified as harmful components is no more than:

50 mmol/l of amorphous varieties of silicon dioxide, soluble in alkalis;

1.5% by weight of sulfates (gypsum, anhydrite) and sulfides, except pyrite (marcasite, pyrrhotite, gypsum, anhydrite, etc.) in terms of SO₃;

4% by weight pyrite;

15% by volume of layered silicates, if mica, hydromicas, chlorites and others are rock-forming minerals;

0.1% by weight of halogen compounds (halite, sylvite, etc., including water-soluble chlorides) calculated as chlorine ion;

0.25% by weight of free asbestos fibers;

1.0% by weight of coal and wood residues;

10% by volume of each of the listed rock-forming minerals (magnetite, goethite, hematite, etc., apatite, nepheline, phosphorite) or their sum in an amount not exceeding 15%.

APPENDIX B
(Deleted, Amendment No. 2).

Crushed stone – construction material, which is actively used when performing a wide variety of construction work. You can’t do without it when building roads, producing concrete, filling and planning territories. But before purchasing the presented product, it is very important to understand what technical characteristics it has, as well as what types of crushed stone according to GOST are used for certain construction work.

Types of crushed stone according to GOST

It has an extensive classification, the fundamental factor of which is the origin of the material.

What brand of concrete is needed for strip foundation and what proportions of crushed stone it contains can be found out from this

There are the following types of products presented:

Granite

Granite is produced by crushing rock. The obtained material is characterized by such indicators as high strength, resistance to frost, resistance to mechanical influences. Scope of use crushed granite has no restrictions, it can be used in various areas of construction.

Limestone

Limestone - in terms of hardness, strength and frost resistance, this material is inferior to granite, but it is characterized by low cost, as a result of which limestone has become so widespread. It can be used during road construction, for filling areas, if heavy loads are not placed on it. In addition, limestone can act as a coarse aggregate for concrete, which is not used when creating critical structures with huge loads. Compared to granite, limestone is absolutely environmentally friendly. It contains no natural radioactive background.

Factions

Divided into the following fractions:

What components are heavy fine-grained concrete made of and what proportion of crushed stone can be found in this

At the request of the customer, crushed stone can be obtained in other fractions, as well as in the form of a mixture standard sizes. It is the grain sizes that influence the scope of application finished product. For example, medium and fine are used in the production of concrete and asphalt concrete compositions. The product with a large fraction is widely used in road construction.

Price

For pricing, the fundamental factors are the type of product. Granite material has the highest cost. Its price for 1 m3 will be approximately 1900 rubles. Crushed stone of limestone origin will cost you 1,400 rubles.

What are the features of crushed stone with a fraction of 40 70 can be found out from this

Crushed stone is a building material unique in its qualities. It has become widespread in the field of construction, because it is characterized by such qualities as strength, frost resistance, and environmental safety. Before purchasing this product, you must clearly decide for what purposes you are going to use it, as well as what fraction.

GOST 8267-93

INTERSTATE STANDARD

CRUSHED STONE AND GRAVEL
FROM DENSE ROCKS
FOR CONSTRUCTION WORK

TECHNICAL CONDITIONS

INTERSTATE SCIENTIFIC AND TECHNICAL COMMISSION
ON STANDARDIZATION AND TECHNICAL REGULATION
IN CONSTRUCTION

Preface

1 DEVELOPED by the VNIPIIstromsyryo Institute with the participation of VNIIzhelezobeton, NIIZhB, Soyuzdornia of the Russian Federation

INTRODUCED by the State Construction Committee of Russia

2 ADOPTED by the Interstate Scientific and Technical Commission for Standardization and Technical Regulation in Construction (INTKS) on November 10, 1993.

State name	Name of the state construction management body
The Republic of Azerbaijan	State Construction Committee of the Azerbaijan Republic
Republic of Armenia	State Architecture of the Republic of Armenia
Republic of Belarus	Gosstroy of the Republic of Belarus
The Republic of Kazakhstan	Ministry of Construction of the Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy of the Kyrgyz Republic
The Republic of Moldova	Ministry of Architecture and Construction of the Republic of Moldova
Russian Federation	Gosstroy of Russia
The Republic of Tajikistan	State Construction Committee of the Republic of Tajikistan
The Republic of Uzbekistan	State Committee for Architecture and Construction of the Republic of Uzbekistan

3 INSTEAD GOST 8267-82, GOST 8268-82, GOST 10260-82, GOST 23254-78, GOST 26873-86

4 ENTERED INTO EFFECT on January 1, 1995 as a state standard of the Russian Federation by Decree of the State Construction Committee of Russia dated June 17, 1994 No. 18-43

INTERSTATE STANDARD

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS
FOR CONSTRUCTION WORK

Technicalconditions

Crushed stone and gravel of solid rocks for construction works.
Specifications

dateintroduction 1995-01-01

1 AREA OF USE

This standard applies to crushed stone and gravel from rocks with an average grain density of 2.0 to 3.0 g/cm 3, used as aggregates for heavy concrete, as well as for road and other types of construction work.

The standard does not apply to crushed stone and gravel for the ballast layer of railway tracks and decorative crushed stone.

The requirements set out in paragraphs 4.2-4.9, sections 5 and 6 are mandatory.

GOST 3344-83 Crushed stone and slag sand for road construction. Specifications

GOST 8269.0-97 Crushed stone and gravel from dense rocks and industrial waste for construction work. Methods of physical and mechanical tests

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

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

3 DEFINITIONS

The following terms are used in this standard.

Crushed stone from rocks- inorganic granular bulk material with grains of coarseness. 5 mm, obtained by crushing suitable rocks, gravel and boulders, incidentally mined overburden and host rocks or substandard waste from mining enterprises for processing ores (ferrous, non-ferrous and rare metals of the metallurgical industry) and non-metallic minerals from other industries and subsequent sieving of crushed products.

Rock gravel- inorganic granular bulk material with grains of coarseness. 5 mm, obtained by sieving natural gravel-sand mixtures.

4 TECHNICAL REQUIREMENTS

4.1 Crushed stone and gravel must be manufactured in accordance with the requirements of this standard according to technological documentation approved by the manufacturer.

4.2 Main parameters and dimensions

4.2.1.

4.2.2 Complete residues on control sieves when sifting crushed stone and gravel of fractions from 5 (3) to 10 mm, St. 10 to 15 mm; St. 10 to 20 mm, St. 15 to 20 mm; St. 20 to 40 mm, St. 40 to 80 (70) mm and mixtures of fractions from 5 (3) to 20 mm must correspond to those indicated in table 1, where d And D- the smallest and largest nominal grain sizes.

Table 1

Diameter of test sieves holes, mm

0,5 (d+ D)

Total residues on sieves, % by weight

From 90 to 100

Notes

2 By agreement between the manufacturer and the consumer, it is allowed to produce crushed stone and gravel with a total sieve residue of 0.5 ( d+ D) from 30 to 80% by weight.

4.2.2. (Amended edition, Rev. No. 3).

4.2.3 For crushed stone and gravel fractions St. 80 (70) to 120 mm and St. 120 to 150 mm, as well as for a mixture of fractions produced by agreement between the manufacturer and the consumer, complete residues on test sieves with a diameter d,D, 1,25D must satisfy those indicated in Table 1, and the ratio of fractions in the mixtures is established by agreement between the manufacturer and the consumer in accordance with regulatory documents for the use of these mixtures for construction work.

4.2.3. (Changed edition, Amendment No. 3).

4.2.4 Excluded. (Change #3).

4.3.1 Crushed gravel must contain crushed grains in an amount of at least 80% by weight. It is allowed, by agreement between the manufacturer and the consumer, to produce crushed stone from gravel containing at least 60% crushed grains.

4.3.2 The shape of crushed stone and gravel grains is characterized by the content of lamellar (flaky) and needle-shaped grains.

Crushed stone, depending on the content of lamellar and needle-shaped grains, is divided into five groups, which must correspond to those indicated in Table 2.

table 2

Percentage by weight

Crushed stone group
	Up to 10 incl.
	St. 10 to 15



Note - By agreement between the manufacturer and the consumer, it is allowed to produce crushed stone from igneous rocks containing St. 50%, but not more than 65% of grains are lamellar (flaky) and needle-shaped.

4.3.2. (Changed edition, Amendment No. 3).

4.3.3 Gravel should not contain lamellar and needle-shaped grains of more than 35% by weight.

4.4Strength

4.4.1 The strength of crushed stone and gravel is characterized by a grade determined by the crushability of crushed stone (gravel) when compressed (crushed) in a cylinder.

Crushed stone and gravel intended for the construction of highways are characterized by a grade based on abrasion in a shelf drum.

Table 3

Grade for crushability of crushed stone from sedimentary and metamorphic rocks	Weight loss when testing crushed stone, %
	dry	saturated with water
	Up to 11 incl.	Up to 11 incl.
	St. 11 to 13	St. 11 to 13

Table 4

Grade for crushability of crushed stone from igneous rocks	Mass loss when testing crushed stone, %
Grade for crushability of crushed stone from igneous rocks	from intrusive rocks	from effusive rocks
	Up to 12 incl.	Up to 9 incl.
	St. 12 to 16

It is allowed to determine the grade of crushed stone from sedimentary and metamorphic rocks both in a dry and in a water-saturated state.

If the grades do not match in terms of crushability, the strength is assessed based on the test results in a water-saturated state.

The grades for crushability of crushed stone made from grace and grace must meet the requirements specified in Table 5.

Table 5

Grade for crushability of crushed stone and gravel	Weight loss during testing,%
Grade for crushability of crushed stone and gravel	crushed gravel
	Up to 10 incl.	Up to 8 incl.
	St. 10 to 14

4.4.3 Abrasion grades of crushed stone and gravel must meet the requirements specified in Table 6.

Table 6

Grade for abrasion of crushed stone and gravel	Weight loss during testing,%
Grade for abrasion of crushed stone and gravel
	Up to 25 incl.	Up to 20 incl.
	St. 25 to 35	St. 20 to 30

Table 7

Percentage by weight


Crushed stone from igneous, metamorphic and sedimentary rocks of the world:
1400; 1200; 1000


Crushed stone from gravel and boulders and gravel grades:

4.6 Frost resistance

4.6.2 Crushed stone and gravel are divided into the following grades based on frost resistance: F15; F25; F50; F100; F150; F200; F300; F400.

The frost resistance indicators of crushed stone and gravel when tested by freezing and thawing or saturation in a solution of sodium sulfate and drying must correspond to those indicated in Table 8.

Table 8

Type of test	Frost resistance grade for crushed stone and gravel
Type of test
Freezing - thawing: number of cycles

Saturation in sodium sulfate solution - drying: number of cycles
weight loss after testing,%, no more

Table 9

Percentage by weight

Type of rock and grade for crushability of crushed stone and gravel
Crushed stone from igneous and metamorphic rocks grades:
» 600 to 800 incl.
Crushed stone from sedimentary rocks grades: from 600 to 1200 incl.

crushed stone from gravel and boulders and gravel grades:



Note - It is allowed in crushed stone grades of crushability 800 and higher from igneous, metamorphic and sedimentary rocks to increase by 1% the content of dust particles at following conditions: If, during geological exploration of the deposit, the absence of clayey and marly inclusions and interlayers in the original rock is established; Upon presentation by the manufacturer of a conclusion from a specialized laboratory on the absence of clay minerals in the composition of particles less than 0.05 mm in size.

Table 10

Percentage by weight

Grade for crushability of crushed stone and gravel
Crushed stone from igneous, sedimentary and metamorphic rocks grades:

Crushed stone from gravel and boulders, gravel grades 1000, 800, 600, 400

4.8Presence of harmful components and impurities

4.8.1 Crushed stone from incidentally mined overburden and host rocks and substandard waste from mining enterprises for processing ores (ferrous, non-ferrous and rare metals of the metallurgical industry) and non-metallic minerals from other industries must be resistant to all types of decay.

The stability of the crushed stone structure against all types of decay must meet the requirements specified in Table 11.

Table 11

Grade for crushability of crushed stone	Mass loss during decay, %, no more
1000 and above

The durability of crushed stone and gravel is determined by the mineralogical and petrographic composition of the original rock and the content of harmful components and impurities that reduce the durability of concrete and cause corrosion of the reinforcement of reinforced concrete products and structures.

The list of harmful components and their maximum permissible contents are given in Appendix A.

4.9. When producing crushed stone and gravel, their radiation-hygienic assessment must be carried out, based on the results of which the scope of application is established. Crushed stone and gravel depending on the values of the total specific effective activity of natural radionuclides A eff is used:

At A eff up to 370 Bq/kg - in newly constructed residential and public buildings;

At A eff St. 740 to 1500 Bq/kg - in road construction outside populated areas.

If necessary, in national standards in force on the territory of the state, the value of the specific effective activity of natural radionuclides can be changed within the limits specified above.

(Changed edition. Amendment No. 1, 2).

4.10 Crushed stone and gravel must not contain foreign contaminants.

4.11 Provision of the standard values of crushed stone and gravel quality indicators in terms of grain composition (content of grains smaller than the smallest nominal size d D) and the content of dust and clay particles should be at least 95%.

5 ACCEPTANCE RULES

5.1 Crushed stone and gravel must be accepted by the technical control of the manufacturer.

5.2 Acceptance and delivery of crushed stone and gravel is carried out in batches. A batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions), established in the supply contract and simultaneously shipped to one consumer in one train or one vessel. When shipping by road, a batch is considered to be the amount of crushed stone (gravel) of one fraction (mixture of fractions) shipped to one consumer during the day.

5.3 To verify compliance of the quality of crushed stone (gravel) with the requirements of this standard, acceptance control and periodic tests are carried out.

Grain composition;

5.4 During periodic tests, determine:

Once every 10 days - the content of lamellar and needle-shaped grains and the content of crushed grains in crushed stone from gravel and the content of free asbestos fiber in crushed stone from asbestos-containing rocks;

Once a quarter - strength and bulk density, stability of the structure against decay;

In the absence of geological survey data on radiation-hygienic assessment of the deposit and a conclusion on the class of crushed stone and gravel, the manufacturer carries out a preliminary assessment of the developed rock areas directly in the quarry or crushed stone (gravel) in the finished product warehouse in accordance with GOST 30108.

(Changed edition. Amendment No. 2).

5.5 Sampling and preparation of crushed stone (gravel) samples for quality control at the manufacturer is carried out in accordance with the requirements of GOST 8269.0, GOST 8269.1.

Control points for preliminary assessment of rocks and the class of crushed stone and gravel are selected according to GOST 30108.

(Changed edition. Amendment No. 2).

5.6 When checking the compliance of crushed stone (gravel) with the requirements of this standard, the consumer must apply the sampling procedure given in clauses 5.7-5.10.

5.7 The number of spot samples taken by the consumer to control the quality of crushed stone (gravel) in each batch, depending on the volume of the batch, must be at least:

up to 350 m 3 ................................................... ........... 10

St. 350 to 700 m 3 ............................................... 15

» 700 m 3 ................................................... ............ 20

(Changed edition. Amendment No. 2).

5.9 To control the quality of crushed stone (gravel) supplied by water transport, spot samples are taken when unloading ships.

5.10 To control the quality of crushed stone (gravel) shipped by road, spot samples are taken when unloading vehicles.

If the batch consists of less than ten cars, then crushed stone samples are taken from each car.

5.11 The quantity of crushed stone (gravel) supplied is determined by volume or weight. Measurement of crushed stone (gravel) is carried out in carriages and cars.

The volume of crushed stone (gravel) supplied in a carriage or car is determined by its measurement, the resulting volume is multiplied by the compaction coefficient of crushed stone (gravel) during transportation, which depends on the loading method, transportation distance, and grain composition. The maximum permissible value of humidity and compaction coefficient, which should not exceed 1.10, is established in the supply contract.

5.13 The results of acceptance inspection and periodic testing are presented in a quality document, which indicates:

Name of the manufacturer and its address;

Number and date of issue of the document;

Name and address of the consumer;

Batch number and amount of crushed stone (gravel);

Car number or vessel number and invoice numbers;

- grain composition of crushed stone (gravel);

Brand of crushed stone (gravel) by strength (crudibility);

Frost resistance of crushed stone (gravel);

Bulk density of crushed stone (gravel);

Specific effective activity of natural radionuclides of crushed stone (gravel);

Stability of the crushed stone structure against decay;

Designation of this standard.

6 CONTROL METHODS

6.1 Tests of crushed stone and gravel are carried out in accordance with GOST 8269.0, GOST 8269.1.

When determining the grain composition of crushed stone and gravel, it is allowed to use a sieve with 70 mm holes before equipping enterprises with sieves with 80 mm holes.

(Changed edition. Amendment No. 2).

6.2 The stability of the crushed stone structure against all types of decay is determined according to GOST 8269.0.

(Changed edition. Amendment No. 2).

6.3 The specific effective activity of natural radionuclides in crushed stone and gravel is determined by the gamma spectrometric method according to GOST 30108.

6.4 Ensuring the content of grains smaller than the smallest nominal size in crushed stone and gravel established by the standard d and more of the largest nominal size D and the content of dust and clay particles is characterized by the ratio of the number of replacement samples, the quality indicators of which exceed standard values, to the total number of replacement samples taken and tested during one quarter.

7 TRANSPORTATION AND STORAGE

7.1 Crushed stone and gravel are transported in bulk in vehicles of any kind in accordance with the current rules for the transportation of goods and technical conditions for loading and securing goods, approved by the Ministry of Railways, rules for the transportation of goods by road and water transport.

When transporting crushed stone and gravel by rail, wagons should be loaded taking into account the full use of their carrying capacity.

7.2 Crushed stone and gravel are stored separately into fractions and mixtures of fractions under conditions that protect them from clogging and contamination.

APPENDIX A

(required)

1 The main components that reduce the strength and durability of concrete include inclusions:

Clay minerals (montmorillonite, kaolinite, etc.);

Mica and hydromicas and other layered silicates;

Asbestos;

Organic substances (coal, lignite, oil shale, humic acids, etc.);

Minerals that are unstable to weathering processes (chlorite, apatite zeolite, nepheline, phosphorite).

2 The main components causing deterioration of surface quality and internal corrosion of concrete include inclusions:

Rocks and minerals containing amorphous varieties of silicon dioxide (chalcedony, opal, etc.);

Rocks and minerals containing iron oxides and hydroxides (magnetite, goethite, etc.);

Mica, gillic mica and other layered silicates.

3 The main components that cause corrosion of reinforcement in concrete include inclusions:

4 Crushed stone and gravel are used in concrete without restrictions, if the content of rocks and minerals classified as harmful components is no more than:

50 mmol/l of amorphous varieties of silicon dioxide, soluble in alkalis;

1.5% by weight of sulfates (gypsum, anhydrite) and sulfides, except pyrite (marcasite, pyrrhotite, gypsum, anhydrite, etc.) and calculated as SO 3;

4% by weight pyrite;

15% by volume of layered silicates, if micas, hydromicas, chlorites and others are rock-forming minerals;

0.1% by weight of halogen compounds (halite, sylvite, etc., including water-soluble chlorides) calculated as chlorine ion;

0.25% by weight of free asbestos fibers;

1.0% by weight of coal and wood residues;

10% by volume of each of the listed rock-forming minerals (magnetite, goethite, hematite, etc., apatite, nepheline, phosphorite) or their sum in an amount of no more than 15%.

APPENDIX B

Deleted (Change No. 2)

Keywords: crushed stone, crushed rock, gravel, crushed gravel, construction work

Crushed stone GOST 8267 93 technical conditions. With changes and additions from

1 AREA OF USE

2 REGULATORY REFERENCES

5 ACCEPTANCE RULES

7 TRANSPORTATION AND STORAGE

APPENDIX A

CONTENT OF HARMFUL COMPONENTS AND IMPURITIES

APPENDIX B

Deleted (Change No. 2)

Definition of quality

Areas of use

Specifications

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS FOR CONSTRUCTION WORKS
GOST 8267-93
Specifications

1 area of use

2 Normative references

3 Definitions

4 Technical requirements

5 Acceptance rules

6 Control methods

7 Transportation and storage

Content of harmful components and impurities

Types of crushed stone according to GOST

Granite

Limestone

Factions

Price

Latest

You need to know this

Crushed stone GOST 8267 93 technical conditions. With changes and additions from

1 AREA OF USE

2 REGULATORY REFERENCES

5 ACCEPTANCE RULES

7 TRANSPORTATION AND STORAGE

APPENDIX A

CONTENT OF HARMFUL COMPONENTS AND IMPURITIES

APPENDIX B

Deleted (Change No. 2)

Definition of quality

Areas of use

Specifications

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS FOR CONSTRUCTION WORKS GOST 8267-93Specifications

1 area of ​​use

2 Normative references

3 Definitions

4 Technical requirements

5 Acceptance rules

6 Control methods

7 Transportation and storage

Content of harmful components and impurities

Types of crushed stone according to GOST

Granite

Limestone

Factions

Price

Latest

You need to know this

CRUSHED STONE AND GRAVEL FROM DENSE ROCKS FOR CONSTRUCTION WORKS
GOST 8267-93
Specifications

1 area of use