Natural sand for construction works GOST 8736 93

GOST 8736-93

Group w17

Interstate standard

Sand for construction work

Technical conditions

Sand for Construction Works. Specifications.

ISS 91.100.15
OKSTA 5711

Date of introduction 1995-07-01

Preface

1 Developed by the Institute of VinipiStroxyrier with the participation of Somponia, NIZB, Tsniyomtp of the Russian Federation

Deposited by the Ministry of Internal Affairs of Russia

2 Adopted by the Interstate Scientific and Technical Commission on Standardization and Technical Registration in Construction (MNTKS) November 10, 1993


Name of state
The Republic of Azerbaijan
Republic of Armenia	State Spiritchitectures of the Republic of Armenia
Republic of Belarus	Gosstroy Republic of Belarus
The Republic of Kazakhstan	MinStroy Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy Kyrgyz Republic
The Republic of Moldova	Minarkhstroy Republic of Moldova
the Russian Federation	Gosstroy Russia
The Republic of Tajikistan
The Republic of Uzbekistan

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


Name of state	Name of the authority of government construction
The Republic of Azerbaijan	Gosstroy Azerbaijan Republic
Republic of Armenia
Republic of Belarus
The Republic of Kazakhstan	Construction Agency and Architectural and City Planning Control of the Ministry of Economy and Trade of the Republic of Kazakhstan
Kyrgyz Republic	Minarhstroy Kyrgyz Republic
the Russian Federation	Gosstroy Russia
The Republic of Tajikistan	Gosstroy Republic Tajikistan

Change N 2 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Registration and Certification in Construction (MNTKS) on May 17, 2000

For the adoption of the change voted:


Name of state	Name of the authority of government construction
The Republic of Azerbaijan	Gosstroy Azerbaijan Republic
Republic of Armenia	Ministry of Urban Planning of the Republic of Armenia
Republic of Belarus	Minstroyarchitecture of the Republic of Belarus
The Republic of Kazakhstan	Committee on Construction Affairs of the Ministry of Energy, Industry and Trade of the Republic of Kazakhstan
Republic of Kyrgyzstan	State Committee under the Government of the Kyrgyz Republic on architecture and construction
The Republic of Moldova	Ministry of the Environment and Improvements of the Territories of the Republic of Moldova
the Russian Federation	Gosstroy Russia
The Republic of Tajikistan	Committee on Architecture and Construction of the Republic of Tajikistan
The Republic of Uzbekistan	Goscomarchitektroy Republic Uzbekistan

3 enacted from July 1, 1995 as the State Standard of the Russian Federation by the Resolution of the Ministry of Construction of Russia of November 28, 1994 N 18-29

4 Instead of GOST 8736-85, GOST 26193-84

5 Edition (March 2006) with changes in N, adopted in February 1998, December 2000 (IUS 5-98, 5-2001)

A change in N 3 has been made, adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Registration and Evaluation of Conformity in Construction (MNTKS) (Protocol No. 38 of 03/18/2011). State Developer Russia. Order of the Federal Agency for Technical Regulation and Metrology of 13.10.2011 N 452-ST Activated on the territory of the Russian Federation from 01/01/2012

Change N 3 made by the manufacturer of the Database on the text of IUS N 1, 2012

1 area of \u200b\u200buse

This standard applies to natural sand of rocks with true grain density from 2.0 to 2.8 g / cm, intended for use as aggregate of heavy, light, fine-grained, cellular and silicate concrete, mortars, preparation of dry mixes, for the device bases and coatings of roads and airfields.

The requirements of this standard do not apply to fractional and crushed sands.

The requirements of this Standard set out in paragraphs 4.4.1, 4.4.3, 4.4.7, 4.4.8, sections 5 and 6 are mandatory.

(Modified edition, meas. N 3).

2 Regulatory references

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

GOST 8269.0-97 Crusp and gravel from dense rocks and waste industrial production for construction work. Methods of physical and mechanical testing

GOST 8735-88 Sand for construction work. Test methods

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

3 Definitions

This standard applies the following terms.

natural sand: Inorganic bulk material with grain size up to 5 mm, resulting from the natural destruction of rock rocks and obtained in the development of sandy and sandy-gravel deposits without use or using special processing equipment.

crushed sand: Sand with grain size up to 5 mm, manufactured from rock rocks and gravel using special crushing and grinding equipment.

fractionated sand: Sand, divided into two or more fractions using special equipment.

(Modified edition, meas. N 1,).

4 Technical requirements

4.1 Sand must be manufactured in accordance with the requirements of this standard for technological documentation approved by the manufacturer.

4.2 Sand Depending on the values \u200b\u200bof the normalized quality indicators (grain composition, dust and clay particles), are divided into two classes I and II.

(Modified edition, meas. N 3).

4.3 Basic parameters and sizes

4.3.1 Depending on the grain composition of the sand of classes I and II, divided into groups of size:

class I - highlands, large, medium and small;

class II - highlands, large, medium, small, very small, thin and very thin.

(Modified edition, meas. N 3).

4.3.2 Each sand group is characterized by the value of the size module specified in Table 1.

Table 1


Sand group	MC MODULE
Increased size
Large
Middle
Small
Very small
Thin
Very thin

(Modified edition, meas. N 3).

4.3.3 Full Sand residue on sieve with a grid N 063 must match the values \u200b\u200bspecified in Table 2.

table 2

In percentage by weight


Sand group	Full balance on sieve N 063
Increased size
Large
Middle
Small
Very small
Thin	Not normalized
Very thin
Note - In agreement of the manufacturer's enterprise with the consumer in class II sand, a deviation of a complete residue on sieve N 063 is allowed from the above, but not more than ± 5%.

(Modified edition, meas. N 3).

Table 3.


Class and sand group
	St..10 mm	Less than 0.16 mm
I class

Small
Class II
Increased size
Large and medium
Small and very small
Slim and very thin	Not allowed	Not normalized

(Modified edition, meas. N 3).

4.4 Characteristics

Table 4.

As a percentage by weight, no more


Class and sand group
Class I.
Increased, large and medium
Small
Class II.
Increased, large and medium
Small and very small
Slim and very thin
Note - in coordination with the consumer in a very fine sand of class II, the content of dust and clay particles is allowed to 7% by weight.

(Modified edition, meas. N 3).

4.4.2 (excluded, meas. N 3).

4.4.3 Sand for use as a placeholder for concrete must have resistance to the chemical effect of cement alkalis.

Sand resistance is determined by the mineral and petrographic composition and the content of harmful components and impurities. The list of rocks and minerals attributable to harmful components and impurities, and their maximum allowable content is given in Appendix A.

4.4.4, 4.4.5 (excluded, meas. N 3).

4.4.6 The manufacturer must inform the consumer with the following characteristics set by geological exploration:

Mineral-petrographic composition indicating breeds and minerals attributable to harmful components and impurities;

Void;

True sand grain density.

4.4.7 Natural sand When processing sodium hydroxide (colorimetric sample on organic impurities according to GOST 8735) should not give a solution to a color corresponding to or darker than the color of the standard.

4.4.8 The sand should be given a radiation-hygienic assessment, according to the results of which it is installed. Sand Depending on the values \u200b\u200bof the specific effective activity of natural radionuclides, apply:

At up to 370 BC / kg - in newly under construction of residential and public buildings;

- With sv. 370 to 740 BC / kg - for road construction within the territory of settlements and prosecution zones, as well as during the construction of industrial buildings and structures;

With sv. 740 to 1500 BC / kg - in road construction outside the settlements.

If necessary, in national norms operating in the state, the value of the specific effective activity of natural radionuclides can be changed within the limits of the norms mentioned above.

(Modified edition, change. N 1, 2).

4.4.9 Sand should not contain foreign clogging impurities.

5 Rules acceptance

5.1 Sand must be accepted by the technical control service of the manufacturer.

5.2 To verify the conformity of sand quality, the requirements of this standard conduct acceptance and periodic tests.

5.3 Acceptance tests at the manufacturing enterprise are carried out daily by testing one interchangeable sample selected according to GOST 8735 from each technological line.

At acceptance control, determine:

Grain composition;

5.4 With periodic sand tests determine:

Once a quarter - bulk density (bulk density with humidity during shipment is determined as needed), as well as the presence of organic impurities (humus substances) in natural sand;

Once a year and in each case, changes in the properties of the developed breed are the true density of the grains, the content of rocks and minerals attributable to harmful components and impurities, the specific effective activity of natural radionuclides.

Periodic control of the indicator of the specific effective activity of natural radionuclides is carried out in specialized laboratories accredited in the prescribed manner for the right to conduct gamma spectrometric tests or in radiation-metric laboratories of supervisory bodies.

In the absence of data from geological intelligence on the radiation-hygienic assessment of the field and the conclusion of the sand class, the manufacturer's company conducts a radiation-hygienic assessment of the developed areas of rocks by an express method directly into the collection or in warehouses of finished products (Namo-Map) in accordance with the requirements of GOST 30108 .

(Modified edition, meas. N 3).

5.5 Selection and preparation of sand samples for quality control at the manufacturer are carried out in accordance with the requirements of GOST 8735.

5.6 Delivery and acceptance of sand produce in batches. The parties consider the amount of material at the same time supplied to one consumer in one railway composition or in one vessel. When shipping by automotive parties, the amount of sand shipped by one consumer is considered during the day.

5.7 The consumer in the control check for the quality of sand should be applied in 5.8-5.11 sampling procedure. With unsatisfactory results of the control check on the grain composition and the content of dust and clay particles, the sand party does not accept.

5.8 The number of point samples, selected for the control check for the quality of sand in each batch, depending on the volume of the party must be at least:


	Volume of party	Number of point samples

	St. 350 to 700 m

From point samples form a combined trial, which characterizes the controlled batch. Averaging, reduction and preparation of the sample is carried out according to GOST 8735.

5.9 For a control check for the quality of sand, shipped by rail, point samples are taken when the wagons are unloading from the flow of sand on the belt conveyors used to transport it to the consumer warehouse. When the wagon is unloading, five point samples are taken at equal intervals. The number of wagons is determined, taking into account the preparation of the required number of point samples in accordance with 5.8.

Wagons are selected by instructions of the consumer. In case the party consists of one car, with its discharge, five point samples are taken, of which they receive a combined sample.

If continuous transport during unloading does not apply, the point samples are taken directly from the wagons. For this, the sand surface in the carriage is aligned and at the sampling points dig holes with a depth of 0.2-0.4 m. Sampling points should be located in the center and in four corners of the car, while the distance from the side of the carrot to the sampling points should be Not less than 0.5 m. Samples from the wells are taken by a scoop, moving it upwards along the walls of the wells.

5.10 For the control check for the quality of sand supplied by water transport, point samples are selected when shipping vessels. In the case of using when unloading belt conveyors, point samples are taken at equal intervals of the time from the flow of sand on the conveyors. When the vessel is unloading with grave cranes, point samples are taken by a scoop at equal intervals of time as unloading directly from the newly formed sand surface in the vessel, and not from the wells.

For the control check of sand, unloaded from ships and laid on the map, the method of hydromechanization, the point samples are selected in accordance with 2.9 GOST 8735.

5.11. For the control check for the quality of sand, shipped by road, point samples are taken when car discharge.

In the case of use when the sand is unloading tape conveyors, the point samples are taken from the sand stream on the conveyors. When unloading each car, select one point sample. The number of cars is determined, taking into account the preparation of the required number of point samples by 5.8. Cars are chosen by instructions of the consumer.

If the party consists of less than ten cars, sand samples are selected in every car.

If the conveyor transport during the unloading of cars does not apply, the point samples are selected directly from cars. To do this, the surface of the sand in the car is aligned, in the center of the body, a hole is digging a depth of 0.2-0.4 m. From the sand samples of the sand, we take the scoop by moving it upwards along the wall of the well.

5.12 The amount of sand supplied is determined by volume or mass. Sand measurement is carried out in cars, vessels or cars.

Sand, shipped in wagons or cars, weigh on the car scales. The mass of sand shipped in the courts is determined by the sediment of the vessel.

The amount of sand from units of mass per unit is recalculated by the values \u200b\u200bof the bulk density of sand, determined during its humidity during shipment. In the contract for the supply indicate the estimated part of the sand accepted by coordination.

5.13 The manufacturer must accompany each batch of sand supplied by the document on its quality of the established form, which should indicate:

The name of the manufacturer and its address;

The number and date of issuing a document;

Party number and the amount of sand;

Rooms of wagons and ship number, overhead numbers;

Class, size module, full residue on sieve N 063;

The specific effective activity of natural radionuclides in the sand in accordance with 5.4;

Designation of this Standard.

6 Monitoring methods

6.1 Sand tests are carried out according to GOST 8735.

6.2. The specific effective activity of natural radionuclides in the sand is determined according to GOST 30108.

7 Transportation and storage

7.1 Sands are transported in open railway cars and vessels, as well as cars, according to the rules of cargo transportation approved in the prescribed manner, the transportation of goods by the appropriate type of transport and store in the warehouse from the manufacturer and the consumer under conditions that protect sand from pollution.

When transporting sand by rail, the requirements of the technical conditions for loading and fastening cargo acting on the transport of this species should also be ensured.

(Modified edition, meas. N 3).

7.2 When shipping and storing sand in the winter time, the manufacturer must take measures to prevent fatigue (multipleting, processing with special solutions, etc.).

Appendix A (mandatory). Content of harmful impurities

Appendix A.
(mandatory)

The permissible content of rocks and minerals attributable to harmful components and impurities in the sand used as aggregate for concrete and solutions should not exceed the following values:

Amorphous species of silicon dioxide soluble in alkalis (chalcedony, opal, flint, etc.) - no more than 50 mmol / l;

Sulfur, sulphides, except for pyrite (marcasit, pyrrhotite, etc.) and sulfates (gypsum, anhydrite, etc.) in terms of SO - no more than 1.0%; Pyrite in terms of SO - no more than 4% by weight;

Mica - no more than 2% by weight;

Galloid compounds (Galite, Silvin et al.), Including water-soluble chlorides, in terms of chlorine ion - no more than 0.15% by weight;

Coal - no more than 1% by weight;

Organic impurities (humus acids) - less than the amount of sodium hydroxide solution (colorimetric sample according to GOST 8267) color corresponding to the color of the standard or darker of this color. The use of sand that does not meet this requirement is allowed only after receiving positive results of sand test results in concrete or solution on the characteristics of durability.

The permissible content of zeolite, graphite, combustible shale is established based on studies of the influence of sand on the durability of concrete or solution.

Appendix B (excluded, meas. N 2).

Electronic document text

prepared Codex JSC and drilled by:

official edition
M.: Standinform, 2006

Editorial Document Taking into account
changes and additions prepared
JSC "Codex"

GOST 8736-93

Interstate standard

Sand for construction work

Technical conditions

Interstate Scientific and Technical Commission
According to standardization and technical rationing
In construction (MNTKS)
Moscow

Preface

1 Developed by the Institute of Vnipperromyrius with the participation of Somponia, NIZB, TsNIIIMTP of the Russian Federation

Deposited by the Ministry of Internal Affairs of Russia

2 Adopted by the Interstate Scientific and Technical Commission on Standardization and Technical Registration in Construction (MNTKS) November 10, 1993

Name of state
The Republic of Azerbaijan
Republic of Armenia	State Spiritchitectures of the Republic of Armenia
Republic of Belarus	Gosstroy Republic of Belarus
The Republic of Kazakhstan	MinStroy Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy Kyrgyz Republic
The Republic of Moldova	Minarkhstroy Republic of Moldova
The Russian Federation	Gosstroy Russia
The Republic of Tajikistan
The Republic of Uzbekistan

Change number 1 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Registration and Certification in Construction (MNTKS) on December 10, 1997

Name of state	Name of the authority of government construction
The Republic of Azerbaijan	Gosstroy Azerbaijan Republic
Republic of Armenia
Republic of Belarus
The Republic of Kazakhstan	Construction Agency and Architectural and City Planning Control of the Ministry of Economy and Trade of the Republic of Kazakhstan
Republic of Kyrgyzstan	Minarhstroy Kyrgyz Republic
The Russian Federation	Gosstroy Russia
The Republic of Tajikistan	Gosstroy Republic Tajikistan

Change number 2 adopted by the Interstate Scientific and Technical Commission for Standardization, Technical Registration and Certification in Construction (MNTKS) on May 17, 2000

Name of state	Name of the authority of government construction
The Republic of Azerbaijan	Gosstroy Azerbaijan Republic
Republic of Armenia	Ministry of Urban Planning of the Republic of Armenia
Republic of Belarus	Minstroyarchitecture of the Republic of Belarus
The Republic of Kazakhstan	Committee on Construction Affairs of the Ministry of Energy, Industry and Trade of the Republic of Kazakhstan
Republic of Kyrgyzstan	State Committee under the Government of the Kyrgyz Republic on architecture and construction
The Republic of Moldova	Ministry of the Environment and Improvements of the Territories of the Republic of Moldova
The Russian Federation	Gosstroy Russia
The Republic of Tajikistan	Gosstroy Republic Tajikistan
The Republic of Uzbekistan	Goscomarchitektroy Republic Uzbekistan

3 enacted from July 1, 1995 as the State Standard of the Russian Federation by the Resolution of the Ministry of Internal Affairs of Russia of November 28, 1994 No. 18-29

4 Instead of GOST 8736-85, GOST 26193-84

5 Edition (July 2009) with amendments No. 1, 2, adopted in February 1998, December 2000 (IUS 5-98, 5-2001)

Interstate standard

Sand for construction work

Technicalconditions

Sand for Construction Works. Specifications.

dateadministration1995-07-01

1 AREA OF USE

This standard applies to natural sand and sand from sefs of crushing rocks with true density of grains from 2.0 to 2.8 g / cm 3, intended for use as aggregate of heavy, light, fine-grained, cellular and silicate concrete, mortars, Preparation of dry mixtures, for the device bases and coatings of roads and airfields.

The requirements of this standard do not apply to fractional and crushed sands.

The requirements of this standard set out in paragraphs ,,, sections and are mandatory.

2 Regulatory references

This standard uses references to the following standards.

Full balance on sieve № 063

Very large

Increased size

Very small

Not normalized

Very thin

Note - In coordination of the manufacturer's enterprise with a consumer in class II sand, a deviation of a full residue on sieve No. 063 from the above, but not more than ± 5% is allowed.

4.3.4 Grain content of sv. 10, 5 and less than 0.16 mm should not exceed the values \u200b\u200bspecified in the table.

Table 3.

As a percentage by weight, no more


		Less than 0.15 mm




Very large and high
Large and medium
Small and very small
Slim and very thin	Not allowed	Not normalized

4.4 Characteristics

in the sand natural

in the sand from sefing crushing

in the sand natural

in the sand from sefing crushing

Very large

Increased size. Large and medium

Very large

Increased, large and medium

Small and very small

Slim and very thin

Not normalized

* For sands obtained in the enrichment of ores of ferrous and non-ferrous metals and non-metallic minerals of other industries.

Note - In very fine natural sand of class II, in coordination with the consumer, the content of dust and clay particles to 7% by weight is allowed.

4.4.2 Sands from crushing sections depending on the strength of rock and gravel shared on the brand. The erupted and metamorphic rocks must have a strength of the compression of at least 60 MPa, sedimentary rocks are at least 40 MPa.

The sand mark of crushing dilutions must match the specified in the table.

Table 5.

	Strength of strength when compressing rock in saturated water condition, MPa, not less	Gravel gravel in cylinder






Note - It is allowed to coordinate the manufacturer with the consumer, the supply of sand II from sedimentary rocks with a compressive strength of less than 40 MPa, but not less than 20 MPa.

4.4.4 Sand from splitting of rocks of rocks having a true density of grains of more than 2.8 g / cm 3 or containing grain and minerals related to harmful components, in an amount exceeding their allowable content, or containing several different harmful components, produced For specific types of construction work on technical documents developed in the prescribed manner and coordinated with specialized in the field of corrosion laboratories.

4.4.5 Supply of a mixture of natural sand and sand from seferences of crushing is allowed when the last of at least 20% by weight is allowed, while the amount of the mixture should meet the requirements of this standard to the quality of sands from crushing docks.

4.4.6 The manufacturer must inform the consumer with the following characteristics set by geological exploration:

Mineral-petrographic composition indicating breeds and minerals attributable to harmful components and impurities;

Void;

True sand grain density.

For BUT Eff to 370 BC / kg - in newly under construction of residential and public buildings;

For BUT Eff. 370 to 740 BC / kg - for road construction within the territory of settlements and prosecution zones, as well as during the construction of industrial buildings and structures;

For BUT Eff. 740 to 1500 BC / kg - in road construction PNO settlements.

If necessary, in national norms operating in the state, the value of the specific effective activity of natural radionuclides can be changed within the limits of the norms mentioned above.

(Modified edition. Change. No. 1, 2).

4.4.9 Sand should not contain foreign clogging impurities.

5 Rules acceptance

5.1 Sand must be accepted by the technical control service of the manufacturer.

5.2 To verify the conformity of sand quality, the requirements of this standard are carried out by receiving and periodic tests.

5.3 Recommendant tests at the manufacturer are carried out daily by testing one interchangeable sample selected according to GOST 8735 from each technological line.

At acceptance control, determine:

Grain composition;

Once a quarter - bulk density (bulk density with humidity during shipment is determined as needed), as well as the presence of organic impurities (humus substances) in natural sand;

Once a year and in each case, changes in the properties of the developed breed are the true density of the grains, the content of rocks and minerals attributable to the harmful components and impurities, the stamp on the strength of sand from fragments of crushing, the specific effective activity of natural radionuclides.

5.5 Selection and preparation of sand samples for quality control at the manufacturer are carried out in accordance with the requirements of GOST 8735.

5.7 The consumer in the control test of the sand quality should be applied in - the sampling order. With unsatisfactory results of the control check on the grain composition and the content of dust and clay particles, the sand party does not accept.

Party Sample Party

Up to 350 m ................................................. ...................................10

St. 350 to 700 m ............................................ .........................fifteen

St. 700 m ................................................ ....................................10

From point samples form a combined trial, which characterizes the controlled batch. Averaging, reduction and preparation of the sample is carried out according to GOST 8735.

Wagons are selected by instructions of the consumer. In case the party consists of one car, with its discharge, five point samples are taken, of which they receive a combined sample.

For the control check of sand, unloaded from ships and laid on the map, the method of hydromechanization, the point samples are selected in accordance with 2.9 GOST 8735.

In the case of use when the sand is unloading tape conveyors, the point samples are taken from the sand stream on the conveyors. When unloading each car, select one point sample. The number of cars is determined, taking into account the preparation of the required number of point samples by software. Cars are chosen by instructions of the consumer.

If the party consists of less than ten cars, sand samples are selected in every car.

5.12 The amount of sand supplied is determined by volume or mass. Sand measurement is carried out in cars, vessels or cars.

Sand, shipped in wagons or cars, weigh on the car scales. The mass of sand shipped in the courts is determined by the sediment of the vessel.

5.13 The manufacturer must accompany each batch of sand supplied by the document on its quality of the established form, which should indicate:

The name of the manufacturer and its address;

The number and date of issuing a document;

Party number and the amount of sand;

Rooms of wagons and ship number, overhead numbers;

Class, size module, full residue on sieve № 063;

The specific effective activity of natural radionuclides in the sand in accordance with;

Designation of this Standard.

6 Monitoring methods

6.1 Sand tests are carried out according to GOST 8735.

6.2 The specific effective activity of natural radionuclides in the sand is determined according to GOST 30108.

7 Transportation and storage

7.1 The sand is transported in open railway cars and vessels, as well as cars in accordance with the rules approved in the prescribed manner, the transportation of goods by the appropriate type of transport and store in stock by the manufacturer and consumer under conditions that protect sand from pollution.

When transporting sand with railway transport, the requirements of the technical conditions of loading and fastening of goods approved by the Ministry of Communications will also be provided.

7.2 When shipping and storing sand in the winter time, the manufacturer must take measures to prevent fatigue (multipleting, processing with special solutions, etc.).

Appendix A.
(mandatory)
Content of harmful impurities

The permissible content of rocks and minerals attributable to harmful components and impurities in the sand used as aggregate for concrete and solutions should not exceed the following values:

Amorphous species of silicon dioxide soluble in alkalis (chalcedony, opal, flint, etc.) - no more than 50 mmol / l;

Sulfur, sulphides, except for pyrite (marcasit, pyrrhotite, etc.) and sulfates (gypsum, anhydrite, etc.) in terms ofSO 3. - no more than 1.0%, pyrite in terms of SO 3 - no more than 4% by weight;

Mica - no more than 2% by weight:

Galloid compounds (Galite, Silvin et al.), Including water-soluble chlorides, in terms of chlorine ion - no more than 0.15% by weight;

Coal - no more than 1% by weight;

The permissible content of zeolite, graphite, combustible shale is established based on studies of the influence of sand on the durability of concrete or solution.

Appendix B (excluded. Change No. 2).

Keywords: Sand Natural, Construction Work, Sand from Crushing Openers, Framed Sand, Crushed Sands, Grain Composition

GOST 8736-93

Interstate standard

Sand for construction work

Technical conditions

Interstate Scientific and Technical Commission
According to standardization and technical rationing
In construction (MNTKS)

Preface

1 Developed by the Institute of Vnipperromyrius with the participation of Somponia, NIZB, TsNIIIMTP of the Russian Federation

Deposited by the Ministry of Internal Affairs of Russia

2 Adopted by the Interstate Scientific and Technical Commission on Standardization and Technical Registration in Construction (MNTKS) November 10, 1993

Name of state	Name of the authority of government construction
The Republic of Azerbaijan	Gosstroy Azerbaijan Republic
Republic of Armenia	State Spiritchitectures of the Republic of Armenia
Republic of Belarus	Gosstroy Republic of Belarus
The Republic of Kazakhstan	MinStroy Republic of Kazakhstan
Republic of Kyrgyzstan	Gosstroy Kyrgyz Republic
The Republic of Moldova	Minarkhstroy Republic of Moldova
the Russian Federation	Gosstroy Russia
The Republic of Tajikistan	Gosstroy Republic Tajikistan
The Republic of Uzbekistan	Goscomarchitektroy Republic Uzbekistan

3 enacted from July 1, 1995 as the State Standard of the Russian Federation by the Resolution of the Ministry of Internal Affairs of Russia of November 28, 1994 No. 18-29

4 Instead of GOST 8736-85, GOST 26193-84

Interstate standard

Sand for construction work

Technicalconditions

Sand for Construction Works.
Specifications.

Date of introduction 1995-07-01

1 AREA OF USE

The requirements of this standard do not apply to fractional and crushed sands.

The requirements of this standard set out in paragraphs ,,, sections and are mandatory.

2 Regulatory references

This standard uses references to the following standards.

Crushed stone and gravel from dense rocks and waste industrial production for construction work. Methods of physical and mechanical testing

Sand for construction work. Test methods.

Construction materials and products. Definition of specific effective activity of natural radionuclides

(Modified edition. Change. No. 2).

3 Definitions

This standard applies the following terms.

Natural sand - inorganic bulk material with grain size up to 5 mm, resulting from the natural destruction of rock rocks and obtained in the development of sandy and sandy-gravel deposits without use or using special processing equipment.

(Modified edition. Change. No. 1).

Crushed sand - Sand with grain size up to 5 mm, manufactured from rock rocks and gravel using special crushing and grinding equipment.

Fractionated sand - Sand, divided into two or more fractions using special equipment.

Sand from sefing crushing - inorganic bulk material with grain size of up to 5 mm, obtained from sefs of crushing rocks in the production of rubble and from waste enrichment of ores of ferrous and non-ferrous metals and non-metallic minerals and other industries.

4 Technical requirements

4.1 Sand must be manufactured in accordance with the requirements of this standard for technological documentation approved by the manufacturer.

4.2 Sand Depending on the values \u200b\u200bof the normalized quality indicators (grain composition, dust and clay particles) are divided into two classes.

4.3 Main parameters and sizes

4.3.1 Depending on the grain composition, the sand is divided into groups of size:

I. class - very large (sand from crushing docks), highlands, large, medium and small;

The class II is very large (sand from crushing areas), highlands, large, medium, small, very small, thin and very thin.

4.3.2 Each group of sand is characterized by the value of the size module specified in the table.

Table 1

	MC MODULE
Very large	St..3.5
Increased size	"3,0,5,5
Large	»2.5" 3.0
Middle	»2.0" 2.5
Small	"1.5" 2.0
Very small	»1.0" 1.5
Thin	"0,7" 1.0
Very thin	Up to 0.7

4.3.3 Full sand residue on sieve with grid No. 063 must match the values \u200b\u200bspecified in the table.

table 2

In percentage by weight

	Full balance on sieve № 063
Very large	St.75
Increased size	"65DU75
Large	"45" 65
Middle	»30» 45
Small	»10» 30
Very small	To 10
Thin	Not normalized
Very thin	»»
Note - In coordination of the manufacturer's enterprise with a consumer in class II sand, a deviation of a full residue on sieve No. 063 from the above, but not more than ± 5% is allowed.

4.3.4 Grain content of sv. 10, 5 and less than 0.16 mm should not exceed the values \u200b\u200bspecified in the table.

Table 3.

As a percentage by weight, no more


	St. 10 mm	St. 5 mm	Less than 0.15 mm
I class

Small
Class II
Very large and high
Large and medium
Small and very small
Slim and very thin	Not allowed		Not normalized

4.4 Characteristics

in the sand natural

in the sand from sefing crushing

in the sand natural

in the sand from sefing crushing

I class

Very large

0,35

Increased size. Large and medium

0,25

0,35

Small

0,35

0,50

Class II

Very large

Increased, large and medium

Small and very small

Slim and very thin

Not normalized

0,1*

Note - In very fine natural sand of class II, in coordination with the consumer, the content of dust and clay particles to 7% by weight is allowed.

* For sands obtained in the enrichment of ores of ferrous and non-ferrous metals and non-metallic minerals of other industries.

The sand mark of crushing dilutions must match the specified in the table.

Table 5.

	Strength of strength when compressing rock in saturated water condition, MPa, not less	Gravel gravel in cylinder
1400
1200
1000		DR8.
		DR12
		DR16
		D24.
Note - Allowed by the manufacturer with the consumer, delivery of sandII of sedimentary rocks with a strength of compressive strength of less than 40 MPa, but not less than 20 MPa.

4.4.6 The manufacturer must inform the consumer with the following characteristics set by geological exploration:

Mineral-petrographic composition indicating breeds and minerals attributable to harmful components and impurities;

Void;

True sand grain density.

For BUT Eff to 370 BC / kg - in newly under construction of residential and public buildings;

For BUT Eff. 370 to 740 BC / kg - for road construction within the territory of settlements and prosecution zones, as well as during the construction of industrial buildings and structures;

For BUT Eff. 740 to 1500 BC / kg - in road construction PNO settlements.

If necessary, in national norms operating in the state, the value of the specific effective activity of natural radionuclides can be changed within the limits of the norms mentioned above.

(Modified edition. Change. No. 1, 2).

4.4.9 Sand should not contain foreign clogging impurities.

5 Rules acceptance

5.1 Sand must be accepted by the technical control service of the manufacturer.

5.2 To verify the conformity of sand quality, the requirements of this standard are carried out by receiving and periodic tests.

5.3 Recommendant tests at the manufacturer are carried out daily by testing one replaceable sample selected with each technological line.

At acceptance control, determine:

Grain composition;

Once a quarter - bulk density (bulk density with humidity during shipment is determined as needed), as well as the presence of organic impurities (humus substances) in natural sand;

In the absence of data from geological intelligence on the radiation-hygienic assessment of the field and the conclusion of the sand class, the manufacturer's company conducts a radiation-hygienic assessment of the developed areas of rocks by the express method directly into the collection or in warehouses of finished products (Namo-Map) in accordance with the requirements.

5.5 Selection and preparation of sand samples for quality control at the manufacturing company are carried out in accordance with the requirements.

Party Sample Party

Up to 350 m ................................................. ...................................10

St. 350 to 700 m ............................................ ..........................fifteen

St. 700 m ................................................ ....................................10

From point samples form a combined trial, which characterizes the controlled batch. Averaging, reduction and preparation of the sample is carried out by.

Wagons are selected by instructions of the consumer. In case the party consists of one car, with its discharge, five point samples are taken, of which they receive a combined sample.

For the control check of sand, discharged from ships and laid on the map, the method of hydromechanization, the point samples are taken in accordance with 2.9.

In the case of use when the sand is unloading tape conveyors, the point samples are taken from the sand stream on the conveyors. When unloading each car, select one point sample. The number of cars is determined, taking into account the preparation of the required number of point samples by software. Cars are chosen by instructions of the consumer.

If the party consists of less than ten cars, sand samples are selected in every car.

5.12 The amount of sand supplied is determined by volume or mass. Sand measurement is carried out in cars, vessels or cars.

Sand, shipped in wagons or cars, weigh on the car scales. The mass of sand shipped in the courts is determined by the sediment of the vessel.

5.13 The manufacturer must accompany each batch of sand supplied by the document on its quality of the established form, which should indicate:

The name of the manufacturer and its address;GOST 8735.

6.2 The specific effective activity of natural radionuclides in the sand is determined by software.

7 Transportation and storage

When transporting sand with railway transport, the requirements of the technical conditions of loading and fastening of goods approved by the Ministry of Communications will also be provided.

7.2 When shipping and storing sand in the winter time, the manufacturer must take measures to prevent fatigue (multipleting, processing with special solutions, etc.).

Appendix A.

(mandatory)

The permissible content of rocks and minerals attributable to harmful components and impurities in the sand used as aggregate for concrete and solutions should not exceed the following values:

Amorphous species of silicon dioxide soluble in alkalis (chalcedony, opal, flint, etc.) - no more than 50 mmol / l;

Sulfur, sulphides, except for pyrite (marcasit, pyrrhotite, etc.) and sulfates (gypsum, anhydrite, etc.) in terms ofSO 3. - no more than 1.0%, pyrite in terms of SO 3 - no more than 4% by weight;

Mica - no more than 2% by weight:

Galloid compounds (Galite, Silvin et al.), Including water-soluble chlorides, in terms of chlorine ion - no more than 0.15% by weight;

Coal - no more than 1% by weight;

Organic impurities (humus acids) - less than the amount of sodium hydroxide solution (colorimetric sample software) color corresponding to the color of the reference or darker of this color. The use of sand that does not meet this requirement is allowed only after receiving positive results of sand test results in concrete or solution on the characteristics of durability.

The permissible content of zeolite, graphite, combustible shale is established based on studies of the influence of sand on the durability of concrete or solution.

Appendix B.

(information)

(Excluded. Change number 2).

Keywords: Sand Natural, Construction Work, Sand from Crushing Openers, Framed Sand, Crushed Sands, Grain Composition

p. 1.

p. 2.

p. 3.

p. 4.

p. 5.

p. 6.

p. 7.

p. 8.

page 9.

p. 10.

p. 11.

p. 12.

p. 13.

p. 14.

p. 15.

p. 16.

Sand for construction work

the upper and lower limits, and the sand belongs to the size of lower from the adjacent groups.

The security established by the standard grain content of less than 0.16 mm, as well as the content of dust and clay particles during acceptance control should be at least 97.5% of the enriched sand of all kinds of high quality categories, 95% - for the enriched sand of all kinds of first Quality categories, 90% of the sands of natural and crushing drops.

2.7. The security established by the standard values \u200b\u200bof the sand size module is characterized by the ratio of the number of replacement samples, the module of the size of which is located within the upper and lower regulatory values \u200b\u200bfor this group of sands, to the total number of replacement samples selected and tested for one block.

The security established by the standard grains in the sands of grains of less than 0.16 mm, as well as dust-like and clay particles, characterize the ratio of the amount of replacement samples, whose quality indicators do not exceed the normative values, to the total number of replacement samples selected and tested for one block. At the same time, the security of less than 0.16 mm grain sets established by the standard, as well as dust and clay particles in the rich sands of the highest quality category, are determined on the basis of statistical control according to the mandatory application 2.

2.8. For permissible PP. 2.6 and 2.7 The number of replacement samples that have deviations from regulatory requirements, the value of this deviation should not exceed 20%.

2.9. The consumer in the control check for the Sand matching the requirements of this standard should apply the sampling procedure given in paragraphs. 2.11-2.13. With unsatisfactory results of the control check on the grain composition and the content of dust and clay particles, the sand party does not accept.

point

2.10. The number of point (partial) samples, selected for the control check for the quality of sand in each batch, should be no less specified below.

Batch volume, m 3

St. 350 to 700 15

Spot samples are combined into an average sample characterizing a controlled batch.

GOST 8736-85

2.11. For the control check for the quality of sand supplied by rail, the point samples are taken when the wagons are discharged from the sand flow on the belt conveyors used to transport it to the consumer warehouse. When the wagon is unloading, five point samples are taken at equal intervals. The number of wagons, with the unloading of which the samples are taken, are taken taking into account the preparation of the required dot samples on 2.10. Wagons are chosen by instructions. If the party consists of one car, then when it is discharged, five point samples are taken, which are combined into the middle sample.

If the conveyor transportation during the unloading of the wagons does not apply, then in the form of an exceptions produce selection of point samples directly from the wagons. For this, the surface of the sand, in the carriage is aligned and at the sampling points take off the holes with depth of 0.2-0.4 m. Selection points are taken in the center and in four corners of the car, while the distance from the side of the car to the selection point should be at least 0 , 5 m. The sand sample holes are selected by a scoop by moving it upwards along the wall of the well.

2.12. For the control check of sand, shipped by water transport, point samples are taken when shipping vessels.

In the case of applying when unloading tape conveyors, the point samples are taken at equal time intervals from the sand flow on the conveyors. When shipping vessels with grab cranes, point samples are taken by a scoop at equal intervals of the time as unloading from the newly formed sand surface in the vessel without the formation of the holes.

2.13. For the control check of sand, shipped by road, point samples are selected during car unloading.

In the case of applied when the sand is unloading, the ribbon conveyors are selected from the flow of sand on the conveyors. When unloading each car is selected one. Point sample. The number of cars, with the unloading of which they produce sampling, take into account the preparation of the required number of partial samples according to claim 2.9. Cars are chosen by instructions of the consumer.

If the party consists of less than ten cars, then test the sand in every car.

If the conveyor transportation is not used during unloading, then the point samples are taken directly from cars. To do this, the sand surface in the car is aligned, in the center of the body, tear the hole in depth

0.2-0.4 m. The sand sample is taken from the well, moving it upwards along the wall of the well.

3. Test methods

3.1. Sampling and preparing samples, as well as sand tests produce according to GOST 8735-75.

3.2. Sampling, as well as testing of rocks and gravel for strength, is produced according to GOST 8269-76.

4. Marks of Rivne, Transportation and Storage

4.1. The enterprise (quarry) is the manufacturer is obliged to accompany each batch of sand supplied by a document on the quality of the established form, which indicates:

the name of the enterprise (career) -potor and its address;

number and date of issuance of the document;

name and address of the consumer;

party number and the amount of sand;

rooms of wagons or ship number and invoice number;

sand size module;

the designation of this standard, and for the sand, which in the prescribed manner is assigned a state mark of quality, is also its image according to GOST 1.9-67.

When supplying sand from seferences of crushing in a document on quality, the brand of the initial rock or gravel is also indicated by strength. Sand indicators are made to the specified document according to the tests listed in paragraph 2.5.

For sand, supplied in accordance with clause 1.12, in the quality document indicate the average density of grains and the content of rocks and minerals attributable to harmful impurities in accordance with GOST 23845-79 and GOST 24100-80.

4.2. The sand is transported in open railway cars and vessels, as well as in cars in accordance with the rules of goods approved in the prescribed manner, the transportation of goods by the corresponding type of transport and are stored under conditions that protect it from clogging and pollution.

When transporting sand with railway transport, the requirements of the technical conditions of loading and fastening of goods approved by the Ministry of Communications will also be provided.

GOST 6736-85

Appendix 1 reference

Terms used in this standard and their explanations

Natural sand - sand with grain size up to 5 mm, resulting from the natural destruction of rock rocks and obtained in the development of sandy-gravel deposits without the use of special processing equipment.

Crushed sand - sand with grain size up to 5 mm, made of rock rocks and gravel using special crushing and grinding equipment.

Sand from crushing drokes - sand with grain size up to 5 mm, obtained from the seferences of crushing products of rocks in the production of rubble.

Enriched sand, crushed crushed sand, enriched sand from crushing sandings - sand with improved grain composition, obtained using special processing equipment and supplied without separation to fractions.

Fractionated sand - sand, separated using special equipment for two or more fractions.

Appendix 2 Mandatory

Statistical quality control of the sand of the highest quality category

1. Statistical control is used in assessing the quality of sand according to the set standard grain content of less than 0.16 mm, as well as the content of dust and clay particles.

2. Statistical quality control includes the definition of the average arithmetic value of the measured indicator based on the results of the test samples in one quarter and the ratio of the values \u200b\u200bof the indicator values \u200b\u200bduring the specified period. The resulting arithmetic value of the indicator is compared with a table corresponding to the calculated coefficient of variation.

3. The average value of the measured quality indicator at the corresponding variation ratio should not exceed the values \u200b\u200bspecified in Table. 1 and 2 of this application.

4. The average arithmetic value of the X indicator is determined by the formula

2**

where X is the result of testing tests; L is the number of replacement samples in one quarter.

5. The coefficient of variation V in percentage is determined by the formula

6. The average grain contents passing through a sieve with grid No. 016 corresponding to different values \u200b\u200bof the variation coefficient are listed in Table. one.

Table 1

Coefficient of variation V,%	The average value of the indicator. %, no more, with a regulatory value	Coefficient of variation V,%
Coefficient of variation V,%		Coefficient of variation V,%

GOST 8736-85

7. The average values \u200b\u200bof the content of dust and clay particles corresponding to different values \u200b\u200bof the variation coefficient are listed in Table. 2.

table 2

Camefficient of variation V t%	The average value of the indicator,%, not more, during the normative value
Camefficient of variation V t%

Editor V. P. Ogurtsov Technical editor N. P. Zavolodchikova A. G. Starostin

Purchased to Nab. 16.12.85 Sublissible, to the furnace. 21.01.86 1.0 Waste. p. l. 1.0 hood. KR.-Ot. "0,999 ud. L. L. Tir. 40 000 Price 5 kopecks.

Order "Hall Sign" Publishing House Standards, 123840, Moscow, GSP, Novopresnevsky per., 3 Type. "Moskovsky Provider", Moscow, Lyalin Per., 6 Zack. 1550.

UDC 691.223: 006.354 group z17

State Standard of the SSR Union

Sand for construction work

Technical conditions

Sand for Construction Works. Specifications.

Resolution of the USSR State Committee on Construction Affairs of September 13, 1965 No. 146, the deadline is established

Failure to comply with the standard is prosecuted by law.

This standard applies to natural sand and sand from sefs of crushing with the average density of grains, including pores (volumetric weight) over 2000 kg / m 3, obtained from specially or simply produced rocks and waste of mining and processing enterprises and used as aggregates for all types Concrete and mortars, as well as devices of road clothing and other construction work.

The sand made according to this standard should be applied in accordance with the current regulatory documents.

Explanations to the terminas used in this standard are given in the reference application 1.

1. Technical requirements

1.2. Sands are divided into the following types:

natural and enriched;

Official edition

from sections of crushing and crushed crushing from screenings. The mixture of the sands of natural and fragmentation of crushing is allowed.

Reprint is prohibited

GOST 8736-85

1.3. According to the coordination of the enterprise (career), the manufacturer with the consumer deliver crushed and fractionated sands, the requirements for which are established in the technical specifications approved in the prescribed manner.

1.4. The sand should be characterized by the following quality indicators:

grain composition;

1.5. Sand from seferences of crushing is also characterized by the strength of the strength of the initial rock in compression in a saturated water.

The company (quarry) is the manufacturer of natural and enriched sands should have and inform the consumer to its requirement the following characteristics set in geological exploration in accordance with GOST 24100-80:

mineral-petrographic composition indicating breeds and minerals attributable to harmful impurities;

the indicator of the potential-reactivity of sand, determined by the chemical method (if there is reactive minerals and rocks in the sand);

description of the shape and character of the surface of sand grains;

the average density of sand grains.

If, with geological intelligence, at the request of the customer, additional characteristics of sands according to GOST 24100-80 were determined: voidness, specific surface,

filtration coefficient, they should also be reported to the consumer at its request.

The enterprise (quarry) is a fingerprint of sand from seferences of crushing should have and report to the consumer at its request of a petrographic characteristic and indicators of the physicomechanical properties of the initial rock formation, established in geological intelligence according to GOST 23845-79.

1.6. Grain composition

1.6.1. Natural sands and crushing drops depending

the grain composition is divided into groups: elevated

the size, large, medium, small and very small.

1.6.2. Enriched sand depending on the grain composition

united in groups: increased size, large, medium and small. Enriched sand from seferences of crushing depending on the grain composition is divided into groups:

marked, large and medium.

1.6.3. For each group of sands: natural and outflows of crushing, enriched and enriched with crushing

after pre-sieving them on a sieve with a hole with a size of 5 mm for the selection of gravel grains (rubble), the sand size module M to and the full balance on the sieve with a mesh No. 063 according to GOST 3584-73 should correspond to the specified in Table. one.

Table 1

	Module crook whit "l to	Full residue on the sieve 063\u003e% by weight	applications
Increased largeness	St. 3.0 to 3.5	St. 65 to 75	Fillers for concrete, materials for road clothing device
			Fillers for concrete and mortars, materials for road clothing


Very small			Fillers for construction solutions

If, when determining the sand group, it is responsible for the module of the size of one group, and on the full residue on sieve No. 063 - the other, the definition of the sand group is produced by the size of the size.

In this case, the passport indicates the deviation of the value of the full residue on sieve No. 063 from the table. 1 for the sand of this group.

Notes: 1. By agreement of the parties, sand is allowed with the size module over 3.5.

2. Very small sand with a dimension module from 1.0 to 1.5 delivered only by order of consumers for use in plaster solutions, as well as for use in a mixture with an enlightening additive as small aggregates for concrete in those areas where there are no sand deposits. with the size module over 1.5,

1.6.4. As small aggregates for concretees should be supplied and used in accordance with the requirements of GOST 10268-80 natural and enriched sands, sands from crushing sections and enriched with crushing of increased size, large, medium and small with the size module from 1.5 to 3, 25

The grain composition of the fine aggregate must comply with the specified below.

GOST 8736-85

Full residues on control sints,% by weight

20-70 . 35-90 . 90-100 . 10-0 . 1,5-3,25

Hole size ■ test sieve, mm

Passage through the sieve JVB 016 Module

In this case, only grains take place through a sieve with round holes with a diameter of 5 mm.

The use of crushing and enriched sand fillers as fine sand fillers from sections of crushing and mixtures with natural small and very small sands is allowed to ensure that the concrete mixture of the concrete mixture is provided without cement overlap.

According to the coordination of the enterprise (career), the preparation with the consumer with a feasibility study is allowed to supply sand for concrete with the size module to 3.5, as well as with a full residue on sieve No. 063 to 75%.

As materials for the device of road clothing should be supplied and used in accordance with the requirements of regulatory and technical documents, natural and enriched sands, sands from crushing sections and enriched with crushing areas of increased size, large, medium and minor.

As aggregates for building solutions, sands that meet the requirements of paragraph 1.6.7 should be supplied and used:

medium, small and very small natural sands;

middle and fine enriched sands.

in the sands natural and from the seferences of crushing increased size, large and middle. . . . . .10

the same, in shallow and very small ....... 15

in the enriched sand of highlands, large

and average ............. 5

the same, in a shallow ........... 10

in the enriched sand from the edges of crushing .... 5

By agreement of the enterprise (career) -Relector with the consumer on average, small and very fine sands intended for construction solutions and road construction works, as well as in the sand from crushing sections, intended for road construction works, the content of grains passing through a sieve With Mesh No. 016, it is allowed to 20% by weight.

1.6.6. The presence of grains of the size of more than 5 mm should not exceed% by weight:

in natural sand. . . . -.......10

in the sand from sefs of crushing ........ 15

in the enriched sand and enriched sand from eds of crushing .............. 5

1.6.7. For the manufacture of mortars (except plaster solutions for the finishing layer), medium natural and medium enriched sands with a dimension module not exceeding 2.2, as well as small natural and small enriched sands, should be supplied and used. The grain content of over 5 mm in the sands for construction solutions should not exceed 0.5% by weight.

To make plaster solutions for the finishing layer, very small sand should be supplied and used. The grain content of over 1.25 mm in the sands used in plaster solutions for the finishing layer should not exceed 0.5% by weight

According to the coordination of the enterprise (career), the manufacturer with the consumer is allowed to supply and use for mortars (except for plastering solutions for the finishing layer) medium natural sand and medium enriched sand, in which the content of grains of over 5 mm does not exceed 5% by weight. For the manufacture of a plaster mortar for the finishing layer, it is allowed to supply and use very small natural sand, in which the grain content of the size of over 1.25 mm does not exceed 5% by weight.

1.7. The amount of dust and clay particles in the sand should not exceed the values \u200b\u200bspecified in Table. 2.

table 2

Sand view		Including clay content in lumps
	% by weight.
Natural: increased, large and medium
small and very small
Enriched: Large and Medium

From sefs of crushing
Crushed crushing		In the sand from seferences of crushing, intended for roadbuilding, and in natural very fine sand, intended for use in plaster solutions for the finishing layer, the content of dust and clay particles to 7% by weight is allowed. The sand of all kinds should not contain foreign clogging impurities. 1.8. Sand, intended for concrete and mortars, when processing sodium hydroxide solution (colorimetric sample on organic impurities according to GOST 8735-75) should not give a solution to a color corresponding to or darker than the color of the standalone. The use of sand that does not meet this requirement is allowed only after special tests and feasibility studies. 1.9. To obtain sand from seferences of crushing and enriched sand, erupted, metamorphic or dense sedimentary rocks, as well as gravel, should be used. Depending on the strength of the initial rock and the gravel, the sands are separated by four stamps: 1000, 800, 600 and 400. The strength of the initial rock and gravel must correspond to the one specified in Table. 3. Table 3. The erupted and metamorphic rocks used to produce sands from crushing sections should have a strength of at least 60 MPa (600 kgf / cm 2), and sedimentary rocks are at least 40 MPa (400 kgf / cm 2). In terms of the coordination of the manufacturer with the consumer, the release of sand obtained from seferences of crushing sedimentary rocks having a strength of compression is below 40 MPa (400 kgf / cm 2), but not less than 20 MPa (200 kgf / cm 2). 1.10. In rocky rocks and gravels used to obtain sand from crushing drokes should not contain weak differences in the amount of more than 10% by weight, and in rocks having a strength of compression below 40 MPa GOST 8736-85 p. 7. (400 kgf / cm 2), and gravel grade DV24 - no more than 15% by weight. With a higher content of weak differences, it is allowed to use only the sections obtained after the second and subsequent stages of crushing. Weakly include breeds with a strength limit for compression in a saturated water of less than 20 MPa (200 kgf / cm 2). 1.11. The quality of the mixture of natural sand and sand from the sections of crushing should satisfy the requirements of this standard for the quality of sands from crushing docks. 1.12. Sand from minimally mined rocks and waste of mining and processing enterprises, having an average grain density over 2800 kg / m 3 or containing grain and minerals, attributable according to GOST 23845-79 and GOST 24100-80 to harmful impurities, should be produced by industry and republican standards or specifications. At the same time, for each field or group of deposits, restrictions should be provided for the maximum value of the average density and the content of rocks and minerals attributable to harmful impurities according to GOST 23845-79 and GOST 24100-80, as well as methods for determining the content of rocks and minerals attributable to Harmful impurities. Restrictions on the average density and content of rocks and minerals attributable to harmful impurities are established on the basis of special studies depending on the purpose of sand and the conditions of operation of the structures in which it is used. 2. Rules acceptance 2.1. The sand produced by the company (quarry) is the manufacturer must be accepted by the technical control of this enterprise. The enterprise (quarry) is the manufacturer must ensure the correspondence of sand with the requirements of this standard. 2.2. Sand delivery is made by parties. The amount of sand, simultaneously shipped by one consumer in one railway composition or in one vessel, consider the party. When shipping by automotive parties, the amount of sand shipped by one consumer is considered during the day. 2.3. The determination of the amount of sand supplied is produced by volume or mass. Sand measurement is produced in cars, vessels and cars. Weighing sand shipped in cars or cars, produced on rail or automotive scales. / Sand mass shipped in ships is determined by the sediment of the vessel. GOST 8736-85 2.4. Recalculation of the amount of sand from weighing units into bulk is produced by the values \u200b\u200bof the bulk density of sand determined in the state of natural humidity. In the wet technological processes of sand production, the humidity of the supplied sand and the bulk density used to recalculate the amount of sand from weighing units into bulk, is established by coordination of the enterprise (career) -Bener with the consumer, taking into account the conditions of the prey of Pesk2, the experience of the career, the data of geological intelligence, time years, as well as the coefficients of sand seal when loading it into vehicles. 2.5. Acceptance control of the quality of sand at the enterprise (career) is the manufacturer consists of determining the grain composition, the content of dust and clay particles, including clay in. lumps. Sand quality control at the specified indicators is produced daily by one replaceable sample according to GOST 8735-75. The definition of a bulk density of sand produce once a quarter. For sand, obtained from albeit-mined rocks and waste of mining and processing enterprises, in addition, the determination of the average density of grains and the inclusions of the rocks and minerals attributable to harmful impurities are carried out. These indicators are determined in each case a change in the properties of sand, but at least once a year. For the specified sand supplied in accordance with clause 1.12, the frequency of determining the average density and content of rocks and minerals attributable to harmful impurities is established by industry, republican standards or technical conditions, but these definitions should be carried out at least once a quarter. 2.6. Security established by the standard of sand size module specified in Table. 1 for each group of sand, with acceptance control on PP. 2.6-2.8 There must be at least 95% of the enriched sand of all kinds of higher quality categories, not less than 90% of the enriched sand of all kinds of the first category of quality and at least 80% of the sands of natural and outflows of crushing. It is allowed to coordinate the manufacturer with the consumer supply of sand, the values \u200b\u200bof the size of the size of which are within the regulatory quantities specified in Table. 1 for two adjacent sand groups, if the difference in the upper and lower limits of the domain module values \u200b\u200bdoes not exceed 0.5. In this case, the requirements specified above for various types of sand requires the values \u200b\u200bof the size of the size of the size of the size within

4229 09/18/2019 5 min.

When performing construction work it is impossible to do without such material as sand. It is he who takes an active part in the preparation of various solutions and concrete. But the range of such a product is very large today that it is sometimes difficult to choose a suitable for your occasion. For this reason, it is necessary to know which types of building sand exist, and what properties each of them has. Further in the article, we consider the range of sand for the construction robot GOST 8736-2014.

Technical characteristics of sand GOST 8736-2014

All parameters and properties that have a building sand are governed by the standard GOST 8736-2014. Before sending sand for sale, the manufacturer is obliged to specify the following data obtained during geological exploration:

the presence of breeds and minerals that are harmful components;
the presence of emptiness;
the presence of organic impurities;
the density of the pellets of the true type.

What trials are subject to material

According to the established standard, building natural material may be subject to such tests:

Calculation of bulk density and existence of emptiness. To determine the bulk density of the presented product, it is necessary using a sowing in a pre-measured tank in the form of a cylinder, the height of which is 10 cm, placed sand, filling up to the upper edges. You can use the standard for these purposes. Funnel with a valve. The cone without the coupling of the sand remove the clove with the edges of the tank using the metal line. After that, the vessel with sand is sent to the scales. During such a test, a bulk density of the material is calculated, which is calculated according to the following formula: P \u003d (M1-M) / V. In this formula T - the mass of the measuring vessel, kg; m1- mass of measuring tank with sand, kg; V- volume of tank, m3.
Definition of humidity level. To carry out such a test, it is necessary to compare the mass of the material of natural humidity and after it was dried. To carry out experience, it is required to take the material in the amount of 1 kg and pour on the tray, weighed, write the resulting value. After the ego, the drying is again sent to the scales and weighed. Determine the humidity according to the following formula: W \u003d (M-M1) x M1 x 100. In this formula T-Massa sand of natural humidity; M1-Massage sand in a dry condition, G.
Determining the presence of organic impurities. For tortured to understand, contains natural sand organic impurities, it is necessary to compare the staining of an alkaline solution over a breakdown with the material with the color of the standard.
Determination of the amount of dust and clay components. To perform the task, it is necessary to use the soching method in which the grain takes part in size up to 0.05 mm. In this case, such a formula is used: Potm \u003d (M-M1) / M x 100. In this formula M-Massage of dry sand until the misunderstanding, r; M1 is a mass of dry sand after pushing, the city is determined by the grain composition and the size module. These tests are carried out using the method of residential material on a standard SIT set.

Types of construction material

Sand is a material that is a mixture of mineral components formed by the destruction of rocks. Given the established standard, the building sand is divided into two main types: the first and second class.

If the material has a size model of 2-2.5 mm, then it is used in the manufacture of concrete or reinforced concrete structures. The material with the size of the granules of 1.5-2 mm is activated during the production of bricks. And for the finest sand, there is also a field of application that involves the manufacture of building mixtures. In order to find the desired type of sand you need to know what.

All these types of construction sand are governed by the standard, but there are still other types of material that is classified according to such indicators as origin and application.

By method of mining:

career;
river;
nautical;
quartz.

Where the crushed stone of the fraction 20 40 is applied and what is GOST can be learn from this

Career

The presented material received such a name due to its origin. It has clay and stones, with the result that the career sand has not received widespread use. It can be used when planning a plot, submits for tie from concrete.

To improve the qualitative characteristics of the career sand, it directly on the place of production must be rinsed with water. Then he will be able to free himself from dusty granules and clay. As a result, a blank material is obtained. It is allowed to apply when performing shuttering and masonry solution. Also, remove the clay with the help of the sieve by the usual method of sieving.

To give an unequivocal answer to the question of which sand is considered the best, impossible. After all, each of the materials presented is designed to perform specific works.

Sand is a very important material in the field of construction. Without it, it is impossible to build the foundation, perform the masonry of the walls and even prepare the building mixtures. Thanks to such a large assortment, it is possible to choose the type of material that is ideal for certain works.

Natural sand for construction works GOST 8736 93

1 area of \u200b\u200buse

2 Regulatory references

3 Definitions

4 Technical requirements

5 Rules acceptance

6 Monitoring methods

7 Transportation and storage

Appendix A (mandatory). Content of harmful impurities

Interstate standard

1 AREA OF USE

2 Regulatory references

5 Rules acceptance

6 Monitoring methods

7 Transportation and storage

Appendix A. (mandatory) Content of harmful impurities

Appendix B (excluded. Change No. 2).

1 AREA OF USE

2 Regulatory references

3 Definitions

4 Technical requirements

5 Rules acceptance

7 Transportation and storage

Appendix A.

Appendix B.

Sand for construction work

2**

Technical characteristics of sand GOST 8736-2014

What trials are subject to material

Types of construction material

Career

Appendix A.
(mandatory)
Content of harmful impurities