Are you here: Questions and answers

Aerated concrete (aerated concrete) is a lightweight porous autoclaved material manufactured on German equipment, which ensures high accuracy of geometric dimensions and allows laying walls with glue.

The blocks are designed for laying external and internal walls and partitions in the construction of multi-storey frame-type buildings, 1-3 storey houses, cottages, garages, outbuildings.

Advantages:

Ease aerated concrete allows you to reduce transport and installation costs, reduce the complexity of work, because. instead of 16 bricks, it is enough to lay 1 block.
High thermal insulation. During the construction of housing, the thickness of the outer wall of brick should be more than 1500 mm, and of cellular concrete 400-600 mm. The heat-insulating properties of aerated concrete can significantly save on heating energy.
Machinability. Blocks are well sawn, drilled, nailed. Ease of processing allows you to make structures of any configuration, including arched ones, cut channels and holes for electrical wiring, sockets, pipelines.
Frost resistance. Cellular aerated concrete withstands up to 50 cycles of alternate freezing and thawing.
Fire safety. Cellular concrete is a non-combustible material. It effectively prevents the spread of fire, can be applied to all fire safety classes.
Environmental friendliness. Aerated concrete does not rot, does not age. It is created from environmentally friendly materials (sand, cement, lime, gas-forming substance). Cellular concrete is second only to wood in its environmental friendliness.

GOST 31360-2007

Group G33

INTERSTATE STANDARD

WALL PRODUCTS NON-REINFORCED
AUTOCLAVE CELLULAR CONCRETE

Specifications

Wall unreinforced products of cellular autoclave curing concrete.
Specifications

ISS 91.100.30
OKP 57 4140

Introduction date 2009-01-01

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 "Interstate standardization system. Basic provisions" and MSN 1.01-01-96 * "System of interstate normative documents in construction. Basic Provisions"
_______________
* The document was not accepted in the territory Russian Federation. Until 10/01/2003, SNiP 10-01-94 was in effect. - Database manufacturer's note.

About the standard

1 DEVELOPED by the institute NIIZHB - a branch of the Federal State Unitary Enterprise "NIC Construction" with the participation of TsNIISK im. Kucherenko, MGSU, VGASU (Voronezh), JSC "LZID" (Lipetsk), JSC "NLMK" (Lipetsk), LLC "AEROK" (St. Lipetsk), LLC "Reftinskoe association "Teplit" (Sverdlovsk region), JSC "Glavnovosibirskstroy", JSC "Cottage" (Samara), FGUP "211 KZhBI" (Leningrad region)

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

3 ADOPTED by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (MNTKS) (Minutes No. 32 of November 21, 2007)

Voted to accept:


Short name of the country according to MK (ISO 3166) 004-97		Abbreviated name of the state construction management body
Armenia		Ministry of Urban Development
Kazakhstan		Kazstroycommittee
Kyrgyzstan		Gosstroy
		Agency for Construction and Development of Territories
		Department for Regulation of Urban Planning Activities of the Ministry of Regional Development
Tajikistan		Agency for Construction and Architecture under the Government
Uzbekistan		Gosarchitektstroy

4 This standard is in accordance with European Standard EN 771-4:2003 "Specification for masonry units. Part 4: Autoclaved aerated concrete masonry units" in terms of assessing the conformity of the quality of products made of cellular concrete

5 By order of the Federal Agency for Technical Regulation and Metrology dated May 21, 2008 N 109-st, the interstate standard GOST 31360-2007 was put into effect as the national standard of the Russian Federation from January 1, 2009.

6 TO REPLACE GOST 21520-89 in terms of autoclaved cellular concrete products

Information on the entry into force (termination) of this standard is published in the index "National Standards".

Information about changes to this standard is published in the "National Standards" index, and the text of the changes is published in the "National Standards" information indexes. In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"

1 area of use

This standard applies to non-reinforced wall products made of autoclaved cellular structural and heat-insulating concrete (hereinafter referred to as products) intended for use as load-bearing and self-supporting elements in the outer walls of buildings and structures with dry, normal and wet operating conditions in a non-aggressive environment, as well as for internal walls and partitions in rooms with a relative humidity of not more than 75% and a non-aggressive environment. At a relative air humidity of more than 75%, the inner surfaces of the outer walls made of products must have a vapor barrier coating.

This standard establishes technical requirements, test methods and assessment of the conformity of the quality of products with this standard based on the test results.

Note - Reinforced products from autoclaved cellular concrete are made in accordance with GOST 19010.

2 Normative references

This standard uses references to the following interstate standards:

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

GOST 3560-73 Steel packing tape. Specifications

GOST 7076-99 Construction materials and products. Method for determining thermal conductivity and thermal resistance in a stationary thermal regime

GOST 7502-98 Metal measuring tapes. Specifications

GOST 10180-90 Methods for determining the strength of control samples

GOST 12730.1-78 Concrete. Density determination method

GOST 13015-2003 Reinforced concrete and concrete products for construction. General technical requirements. Rules for acceptance, labeling, transportation and storage

GOST 14192-96 Marking of goods

GOST 18105-86 Concrete. Strength control rules

GOST 18343-80 Pallets for bricks and ceramic stones. Specifications

GOST 19010-82 Concrete and reinforced concrete wall blocks for buildings. General specifications

GOST 21520-89 Small cellular concrete wall blocks. Specifications

GOST 24104-2001 Laboratory balance. General technical requirements

GOST 25485-86 Cellular concrete. Specifications*
_______________
*Probably an original error. You should read GOST 25485-89 Cellular concrete. Specifications, hereinafter in the text. - Database manufacturer's note.

GOST 25898-83 Building materials and products. Methods for determining the resistance to vapor permeation

GOST 26433.1-89 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. Prefabricated elements

GOST 27005-86 Light and cellular concretes. Medium Density Control Rules

GOST 27006-86 Concrete. Squad selection rules

GOST 30244-94 Construction materials. Flammability test methods

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

GOST 31359-2007 Autoclaved cellular concrete. Specifications

Note - When using this standard, it is advisable to check the validity of reference standards according to the "National Standards" index, compiled as of January 1 of the current year, and according to the corresponding information indexes published in the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

In this standard, the following terms are used with their respective definitions:

3.1 block: A product with a rectangular, as a rule, cross section and a thickness slightly less than its width.

3.2 plate: A product with a rectangular cross section, the thickness of which is significantly less than other dimensions and is unchanged throughout the product.

3.3 U-shaped block: A product with a recess in the bed surface, running parallel to the larger linear size of the product.

3.4 grip pockets: Non-through recesses in the end surface of products, designed for manual carrying of products.

3.5 technological void: A through or non-through cavity molded or drilled into a product.

3.6 nominal size: The normalized size of the product, the actual size of which corresponds to the limits of permissible deviations.

4 Technical requirements

4.1 Products must comply with the requirements of this standard and be manufactured according to the technological documentation approved by the manufacturer.

4.2 Main types and dimensions

4.2.1 Products are made in the form of blocks and plates. Blocks can be made with tongue-and-groove (lock) elements and pockets for gripping, as well as U-shaped.

Blocks can have technological through or non-through voids. The shape and dimensions of technological voids must correspond to those specified in the working documentation.

4.2.2 Products are manufactured with the maximum dimensions given in Table 1.

Table 1

In millimeters


Size name	Dimensions

4.2.3 Depending on the maximum deviations of dimensions, shape and appearance indicators, the products are divided into two categories, the requirements for which are given in table 2.

table 2

In millimeters


Name of indicator	The value of the indicator for products

Deviation of geometric dimensions, no more than:
By lenght
By width
Height
Deviation from a rectangular shape (diagonal length difference), no more
Deviation from the straightness of the ribs, no more
Depth of broken corners, no more than two on one product, no more
Depth of broken ribs on one product with a total length of no more than twice the length of the longitudinal rib, no more
Notes 1 Corners and ribs broken off up to 3 mm deep for products of category I and up to 5 mm - for products of category II are not rejection defects. 2 The number of products with maximum deviations of geometric dimensions, shape, corners and ribs that exceed the limit should not be more than 5% of the number of products in each packaged unit. 3 Products of category I are recommended for laying on glue, category II - on mortar. 4 The dimensions of the broken products along the groove and ridge should not exceed: in depth - 10 mm, in length - 30 mm.

4.2.4 The manufacturer, at the request of the consumer, can manufacture products with dimensions other than those given in table 1, taking into account the requirements of table 2, based on the capabilities of the available equipment.

4.2.5 The symbolic designation of products should consist of the name of the product (block, plate), category designation in accordance with Table 2, dimensions in length, width and height (thickness) in millimeters, brand in average density, class in compressive strength, brand for frost resistance and designations of this standard.

An example of a symbol for a category I block, 600 long, 300 wide and 200 mm high, average density grade D500, compressive strength class B2.5, frost resistance grade F25:

Block I/600x300x200/D500/B2.5/F25 GOST 31360-2007

Plate I/1000x600x150/D500/B2.5/F25 GOST 31360-2007

Allowed in symbol include additional information to fully identify products.

4.3 Characteristics

4.3.1 For products, the following physical, mechanical and thermophysical characteristics are determined:

- average density;

- compressive strength;

- thermal conductivity;

- shrinkage during drying;

- frost resistance;

- vapor permeability.

If necessary, establish other quality indicators in accordance with GOST 4.212 or the terms of the contract.

4.3.2 The manufacturer declares, and the customer chooses classes and grades of cellular concrete for the manufacture of products in terms of average density, compressive strength and frost resistance, as well as cellular concrete with the characteristics of thermal conductivity, drying shrinkage and vapor permeability in accordance with GOST 31359.

4.3.3 Average density

4.3.3.1 The grade for the average density of cellular concrete products should not exceed D700.

4.3.3.2 The actual average density of the cellular concrete of the products must correspond to the required one, determined in accordance with GOST 27005, depending on the normalized average density (average density grade) and the actual density uniformity of the cellular concrete.

4.3.4 Compressive strength

4.3.4.1 The compressive strength class of cellular concrete products must be at least B1.5.

4.3.4.2 The actual strength of cellular concrete products should not be lower than the required strength, determined in accordance with GOST 18105, depending on the normalized strength and the actual uniformity of cellular concrete in strength.

4.3.4.3 Compressive strength classes of cellular concrete products are assigned in accordance with building design standards, depending on the operating conditions of the structures in which these products are used.

4.3.5 Thermal conductivity

For products intended for use in external enclosing structures of buildings and structures with normalized parameters of the internal microclimate, the thermal conductivity coefficient of cellular concrete products in a dry state should not exceed the values established by GOST 31359.

4.3.6 Frost resistance

4.3.6.1 For products subjected to alternating freezing and thawing, determine the brand of cellular concrete for frost resistance in accordance with GOST 31359.

4.3.6.2 The grade of cellular concrete products for frost resistance is assigned depending on the operating conditions of the structure and the design winter temperatures of the outdoor air in the construction area in accordance with the building design standards and is taken not lower than:

F25 - for products intended for use in external walls;

F15 - for other products.

4.3.7 Dry shrinkage

Shrinkage during drying of cellular concrete products should not exceed the values established by GOST 31359.

4.3.8 Vapor permeability

The vapor permeability of products is characterized by the coefficient of vapor permeability of cellular concrete used for the manufacture of products.

The vapor permeability coefficient of cellular concrete must comply with those given in GOST 31359.

4.3.9 The specific effective activity of natural radionuclides in products should not exceed 370 Bq/kg in accordance with GOST 30108.

4.4 Fire- specifications

Products belong to the group of non-combustible materials (NG) in accordance with GOST 30244.

4.5 Material requirements

4.5.1 For the manufacture of products, structural and heat-insulating cellular concrete in accordance with GOST 31359 should be used.

4.6 Marking

4.6.1 Marking of products - according to GOST 13015 with the following additions.

4.6.2 Marking is applied to each packaging unit. Markings must be legible and weather resistant.

4.6.3 The marking must contain:

- trademark or name of the manufacturer;

- class of cellular concrete products in terms of compressive strength;

- brand of cellular concrete products by average density;

- brand of cellular concrete products for frost resistance;

- batch number;

- a mark on the passage of technical control.

4.6.4 Transport marking - according to GOST 14192.

4.7 Packaging

4.7.1 Products are placed on pallets in accordance with GOST 18343 and fixed with a heat-shrink film, bandaged with polyester or steel tape in accordance with GOST 3560, or in another way that ensures the immobility and safety of products during transportation.

4.7.2 Upon agreement with the consumer, other types of packaging are allowed to ensure the safety of products during transportation.

5 Safety and environmental requirements

5.1 When processing products with tools and mechanisms that cause increased dust formation (wall chasers, grinders, etc.), it is necessary to take measures to protect the respiratory system and skin.

5.2 Waste generated during the manufacture or use of products must be disposed of in accordance with the current legislation in the field of environmental protection.

6 Acceptance rules

6.1 Acceptance of products is carried out in accordance with the requirements of GOST 13015, this standard, as well as the contract for the manufacture (supply) of products.

6.2 Products are accepted in batches. The batch is considered the number of products made from one raw material, according to one technology, one brand in average density, one class in compressive strength, in a volume not less than a shift, but not more than a daily output or order. A different batch size may be specified in the supply contract.

6.3 The manufacturer is responsible for the conformity of product quality with the requirements of this standard.

The quality of products is ensured by:

- input control of raw materials used for the manufacture of products;

- operational production (technological) control;

- acceptance control of finished products;

- constant statistical factory quality control of products.

Acceptance control includes acceptance and periodic tests carried out in accordance with Table 3.

Table 3


Name of indicator	Type of test		Frequency of control	Test method
	Acceptance	Periodic
Dimensions, straightness of ribs			Each batch
Diagonal length difference			Each batch
Depth of broken corners and ribs			Each batch
Average density			Each batch
Compressive strength			Each batch
Dry shrinkage			At least once a year, as well as when organizing mass production and changing raw materials
Thermal conductivity
Frost resistance

6.4 The manufacturer conducts additional tests of products for quality indicators not established by this standard, based on the intended purpose of the product within the time period agreed with the consumer.

6.5 For testing, at least 12 products are selected from different places of the lot by random selection. If more than three of the specified number of products do not meet the requirements of this standard in terms of size, appearance and shape, 24 products are selected from the lot.

If more than six products do not meet the requirements of this standard in terms of size, appearance and shape, a complete control of the batch of products is carried out for these indicators.

6.6 With satisfactory results of acceptance tests of products in terms of physical and mechanical indicators, the batch is accepted.

In case of unsatisfactory results of acceptance tests of products in terms of physical and mechanical indicators, an assessment is made of the stability of the technological process at the enterprise for the period during which unsatisfactory results were obtained, in accordance with the technological regulations.

6.7 The results of periodic tests are extended to all supplied batches of products until the next periodic tests are carried out.

6.8 The specific effective activity of natural radionuclides of products is controlled by input control according to the documents of the enterprise - the supplier of raw materials. In the absence of data from the supplier of raw materials on the value, testing for this indicator should be carried out at least once a year and every time the supplier of raw materials is changed in accredited testing laboratories.

6.9 When organizing the production of products, changing the supplier of raw materials and before offering products for sale, tests are carried out to prove that the quality of products meets the requirements of this standard, including in terms of changed properties.

The rules for selecting products for testing during the organization of production and independent control are given in Appendix A.

6.10 When testing products by the consumer, inspection control and certification tests, the sample size and the rules for evaluating the results of control are taken in accordance with the requirements of this section, using the control methods in section 7.

In case of disagreement, a control check is carried out in the presence of a representative of the manufacturer. The list of controlled parameters is established by agreement of the parties.

6.11 The manufacturer must carry out quality control of materials and semi-finished products entering the enterprise and operational control of the production process. If significant changes occur in the starting materials or the production process that can lead to a deterioration in the quality of the finished product, then after eliminating these changes, the products are tested for all indicators in accordance with the requirements of this standard.

6.12 To assess the stability of the technological process at the enterprise, the results of quality control of finished products are monthly subjected to statistical processing and establish compliance with the requirements of the technological regulation.

6.13 The consumer has the right to check the compliance of the products specified in the order with the requirements of this standard, using the control procedure established by this standard. Checking products in terms of appearance is carried out before shipment from the manufacturer.

6.14 Each batch of products is accompanied by a quality document, which indicates:

- name and address of the manufacturer;

- purpose of products;

- conditional designation of products;

- the volume of the supplied batch, m;

- product dimensions;

- compressive strength class;

- mark on average density;

- brand for frost resistance;

- specific effective activity of natural radionuclides;

- coefficient of thermal conductivity of products in a dry state;

- shrinkage during drying;

- vapor permeability coefficient;

- number and date of issue of the quality document;

- batch number;

- designation of this standard.

..

7.8 Specific effective activity of natural radionuclides is determined according to GOST 30108.

7.9 It is allowed to use other methods during testing (with the exception of tests when putting products into production and in case of disagreement between interested parties), provided that these methods meet the following conditions:

- the presence of a correlation between the results obtained by the main and alternative methods;

- the availability of verification of information that is the basis for such a connection.

8 Transport and storage

8.1 Loading into vehicles and transportation of products is carried out in accordance with the rules for the carriage of goods in force on a particular type of transport.

Products are transported in overpacks formed using pallets and fasteners.

8.2 When transporting products, products must be protected from mechanical damage and moisture.

8.3 Products must be stored by the manufacturer and consumer on level prepared areas on linings or pallets in conditions that exclude product moisture.

8.4 When monitoring the storage of products in the warehouse of finished products, they check the correct sorting of products by type, category, brand by average density, height of the stack of products in accordance with the technological regulations, as well as the implementation of measures to protect products from mechanical damage and moisture.

8.5 Products are stacked during storage. The height of the stack should ensure the safety of products.

8.6 Loading and unloading products from Vehicle must be carried out mechanically using special load gripping devices or in another way that excludes damage to products.

Loading products "in bulk" and unloading them by dropping are not allowed.

8.7 The user is responsible for incorrect transport, unloading and storage on the construction site.

9 Instructions for use

9.1 Products are used in accordance with the requirements of current building codes, codes of practice or project documentation.

9.2 When installing products with the maximum dimensions specified in 4.2.2, small-scale mechanization should be used.

Annex A (mandatory). Rules for the selection of products for control during the organization of production and independent control tests

Annex A
(mandatory)

A.1 When organizing the production of products and during independent control tests, the physical, mechanical and thermal properties of products are evaluated in accordance with this standard and declared by the manufacturer.

A.2 Representatives of all interested parties may participate in the selection of controlled items and the conduct of proof tests.

A.3 At least 12 products are selected for testing.

The number of test specimens is taken from Table A.1. Sampling is carried out no earlier than 12 hours after the end of autoclaving and unloading products from the autoclave.

Table A.1


Name of indicator	Item number	Test method	Number of samples

Dry shrinkage

A.4 The following methods of product selection are used: random selection, representative selection, selection of products from a stack.

A.5 Random selection is carried out in a manner in which all items have an equal probability of being selected in the sample. The required number of products is selected randomly, regardless of appearance selected products, with the exception of products damaged during transportation, which are not allowed to be selected.

NOTE Sampling of items in the above manner is possible if the items in the sample are transported unpackaged or if they are divided into a large number of small stacks before use.

A.6 If it is impossible to randomly select products, if there is access to a limited number of products, the method of representative selection is used. The stack is divided into at least six parts of equal size. From each part, an equal number of products is selected by random selection, but not more than four, so that a sample of the required size is obtained, regardless of the appearance of the products, with the exception of products damaged during transportation, which are not allowed to be selected.

NOTE When picking items, some parts of the stack should be moved aside to allow access to the items inside the stack.

A.7 When selecting products from a stack consisting of packed products, select at least six packages, from each of which an equal number of randomly selected products is selected, but not more than four so that a sample of the required size is obtained, regardless of the appearance of the products , with the exception of products damaged during transportation, which are not allowed to be taken away.

A.8 If selected devices are used in more than one test, subdivide the sample according to the number of devices used in a particular test.

Electronic text of the document
prepared by CJSC "Kodeks" and checked against:
official publication
M.: Standartinform, 2008

GOST 31360-2007

Group G33

INTERSTATE STANDARD

WALL PRODUCTS NON-REINFORCED
AUTOCLAVE CELLULAR CONCRETE

Specifications

Wall unreinforced products of cellular autoclave curing concrete.
Specifications

ISS 91.100.30
OKP 57 4140

Introduction date 2009-01-01

Foreword

About the standard

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

3 ADOPTED by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (MNTKS) (Minutes No. 32 of November 21, 2007)


Short name of the country according to MK (ISO 3166) 004-97	Country code according to MK (ISO 3166) 004-97	Abbreviated name of the state construction management body
		Ministry of Urban Development
Kazakhstan		Kazstroycommittee
Kyrgyzstan		Gosstroy
		Agency for Construction and Development of Territories
		Department for Regulation of Urban Planning Activities of the Ministry of Regional Development
Tajikistan		Agency for Construction and Architecture under the Government
Uzbekistan		Gosarchitektstroy

5 Order federal agency on technical regulation and metrology of May 21, 2008 N 109-st interstate standard GOST 31360-2007 was put into effect as a national standard of the Russian Federation on January 1, 2009.

6 TO REPLACE GOST 21520-89 in terms of autoclaved cellular concrete products

Information on the entry into force (termination) of this standard is published in the index "National Standards".

Information about changes to this standard is published in the "National Standards" index, and the text of the changes is published in the "National Standards" information indexes. In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"

1 area of use

This standard establishes technical requirements, test methods and assessment of the conformity of the quality of products with this standard based on the test results.

Note - Reinforced products from autoclaved cellular concrete are made in accordance with GOST 19010.

2 Normative references

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

GOST 3560-73 Steel packing tape. Specifications

GOST 7076-99 Construction materials and products. Method for determining thermal conductivity and thermal resistance in a stationary thermal regime

GOST 7502-98 Metal measuring tapes. Specifications

GOST 10180-90 Methods for determining the strength of control samples

GOST 12730.1-78 Concrete. Density determination method

GOST 13015-2003 Reinforced concrete and concrete products for construction. General technical requirements. Rules for acceptance, labeling, transportation and storage

GOST 14192-96 Marking of goods

GOST 18105-86 Concrete. Strength control rules

GOST 18343-80 Pallets for bricks and ceramic stones. Specifications

GOST 19010-82 Concrete and reinforced concrete wall blocks for buildings. General specifications

GOST 21520-89 Small cellular concrete wall blocks. Specifications

GOST 24104-2001 Laboratory balance. General technical requirements

GOST 25485-86 Cellular concrete. Specifications*
_______________
*Probably an original error. You should read GOST 25485-89 Cellular concrete. Technical conditions, hereinafter in the text. - Database manufacturer's note.

GOST 25898-83 Building materials and products. Methods for determining the resistance to vapor permeation

GOST 26433.1-89 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. Prefabricated elements

GOST 27005-86 Light and cellular concretes. Medium Density Control Rules

GOST 27006-86 Concrete. Squad selection rules

GOST 30244-94 Construction materials. Flammability test methods

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

GOST 31359-2007 Autoclaved cellular concrete. Specifications

Note - When using this standard, it is advisable to check the validity of reference standards according to the "National Standards" index, compiled as of January 1 of the current year, and according to the corresponding information indexes published in the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

In this standard, the following terms are used with their respective definitions:

3.1 block: A product with a rectangular, as a rule, cross-section and a thickness slightly less than its width.

3.2 plate: A product with a rectangular cross section, the thickness of which is significantly less than other dimensions and is unchanged throughout the product.

3.3 U-shaped block: A product with a recess in the bed surface, running parallel to the larger linear size of the product.

3.4 grip pockets: Non-through recesses in the end surface of products, designed for manual carrying of products.

3.5 technological void: A through or non-through cavity molded or drilled into a product.

3.6 nominal size: The normalized size of the product, the actual size of which corresponds to the limits of permissible deviations.

4 Technical requirements

4.1 Products must comply with the requirements of this standard and be manufactured according to the technological documentation approved by the manufacturer.

4.2 Main types and dimensions

4.2.1 Products are made in the form of blocks and plates. Blocks can be made with tongue-and-groove (lock) elements and pockets for gripping, as well as U-shaped.

Blocks can have technological through or non-through voids. The shape and dimensions of technological voids must correspond to those specified in the working documentation.

4.2.2 Products are manufactured with the maximum dimensions given in Table 1.

Table 1

In millimeters

4.2.3 Depending on the maximum deviations of dimensions, shape and appearance indicators, the products are divided into two categories, the requirements for which are given in table 2.

table 2

In millimeters


Name of indicator	The value of the indicator for products

Deviation of geometric dimensions, no more than:
By lenght
By width
Height
Deviation from a rectangular shape (diagonal length difference), no more
Deviation from the straightness of the ribs, no more
Depth of broken corners, no more than two on one product, no more
Depth of broken ribs on one product with a total length of no more than twice the length of the longitudinal rib, no more
Notes 1 Corners and ribs broken off up to 3 mm deep for products of category I and up to 5 mm - for products of category II are not rejection defects. 2 The number of products with maximum deviations of geometric dimensions, shape, corners and ribs that exceed the limit should not be more than 5% of the number of products in each packaged unit. 4 The dimensions of the broken products along the groove and ridge should not exceed: in depth - 10 mm, in length - 30 mm.

An example of a symbol for a category I block, 600 long, 300 wide and 200 mm high, average density grade D500, compressive strength class B2.5, frost resistance grade F25:

Block I/600x300x200/D500/B2.5/F25 GOST 31360-2007

Plate I/1000x600x150/D500/B2.5/F25 GOST 31360-2007

It is allowed to include additional information in the symbol for the complete identification of products.

4.3 Characteristics

4.3.1 For products, the following physical, mechanical and thermophysical characteristics are determined:

average density;

Compressive strength;

Thermal conductivity;

Dry shrinkage;

Frost resistance;

Vapor permeability.

If necessary, establish other quality indicators in accordance with GOST 4.212 or the terms of the contract.

4.3.3 Average density

4.3.3.1 The grade for the average density of cellular concrete products should not exceed D700.

4.3.4 Compressive strength

4.3.4.1 The compressive strength class of cellular concrete products must be at least B1.5.

4.3.5 Thermal conductivity

For products intended for use in external enclosing structures of buildings and structures with normalized parameters of the internal microclimate, the thermal conductivity coefficient of cellular concrete products in a dry state should not exceed the values established by GOST 31359.

4.3.6 Frost resistance

4.3.6.1 For products subjected to alternating freezing and thawing, determine the brand of cellular concrete for frost resistance in accordance with GOST 31359.

F25 - for products intended for use in external walls;

F15 - for other products.

4.3.7 Dry shrinkage

Shrinkage during drying of cellular concrete products should not exceed the values established by GOST 31359.

4.3.8 Vapor permeability

The vapor permeability of products is characterized by the coefficient of vapor permeability of cellular concrete used for the manufacture of products.

The vapor permeability coefficient of cellular concrete must comply with those given in GOST 31359.

4.3.9 The specific effective activity of natural radionuclides in products should not exceed 370 Bq/kg in accordance with GOST 30108.

4.4 Fire performance data

Products belong to the group of non-combustible materials (NG) in accordance with GOST 30244.

4.5 Material requirements

4.5.1 For the manufacture of products, structural and heat-insulating cellular concrete in accordance with GOST 31359 should be used.

4.6 Marking

4.6.1 Marking of products - according to GOST 13015 with the following additions.

4.6.2 Marking is applied to each packaging unit. Markings must be legible and weather resistant.

4.6.3 The marking must contain:

Trademark or name of the manufacturer;

Class of cellular concrete products in terms of compressive strength;

Brand of cellular concrete products by average density;

Brand of cellular concrete products for frost resistance;

Batch number;

A mark on the passage of technical control.

4.6.4 Transport marking - according to GOST 14192.

4.7 Packaging

4.7.2 Upon agreement with the consumer, other types of packaging are allowed to ensure the safety of products during transportation.

5 Safety and environmental requirements

5.1 When processing products with tools and mechanisms that cause increased dust formation (wall chasers, grinders, etc.), it is necessary to take measures to protect the respiratory system and skin.

5.2 Waste generated during the manufacture or use of products must be disposed of in accordance with the current legislation in the field of environmental protection.

6 Acceptance rules

6.1 Acceptance of products is carried out in accordance with the requirements of GOST 13015, this standard, as well as the contract for the manufacture (supply) of products.

6.3 The manufacturer is responsible for the conformity of product quality with the requirements of this standard.

The quality of products is ensured by:

Input control of raw materials used for the manufacture of products;

Operational production (technological) control;

Acceptance control of finished products;

Constantly carried out statistical factory quality control of products.

Acceptance control includes acceptance and periodic tests carried out in accordance with Table 3.

Table 3


Name of indicator	Type of test		Frequency of control	Test method
	Acceptance	Periodic
Dimensions, straightness of ribs			Each batch	According to GOST 26433.1
Diagonal length difference			Each batch
Depth of broken corners and ribs			Each batch	According to GOST 21520
Average density			Each batch	According to GOST 12730.1
Compressive strength			Each batch	According to GOST 10180
Dry shrinkage			At least once a year, as well as when organizing mass production and changing raw materials	According to GOST 25485
Thermal conductivity				According to GOST 7076
Frost resistance				According to GOST 31359, appendix B
Vapor permeability				According to GOST 25898

If more than six products do not meet the requirements of this standard in terms of size, appearance and shape, a complete control of the batch of products is carried out for these indicators.

6.6 With satisfactory results of acceptance tests of products in terms of physical and mechanical indicators, the batch is accepted.

In case of unsatisfactory results of acceptance tests of products in terms of physical and mechanical indicators, an assessment is made of the stability of the technological process at the enterprise for the period during which unsatisfactory results were obtained, in accordance with the technological regulations.

6.7 The results of periodic tests are extended to all supplied batches of products until the next periodic tests are carried out.

6.8 The specific effective activity of natural radionuclides A eff of products is controlled during the input control according to the documents of the enterprise - the supplier of raw materials. In the absence of data from the supplier of raw materials on the value of A eff, testing for this indicator should be carried out at least once a year and every time the supplier of raw materials is changed in accredited testing laboratories.

The rules for selecting products for testing during the organization of production and independent control are given in Appendix A.

In case of disagreement, a control check is carried out in the presence of a representative of the manufacturer. The list of controlled parameters is established by agreement of the parties.

6.14 Each batch of products is accompanied by a quality document, which indicates:

Name and address of the manufacturer;

Purpose of products;

Symbolic designation of products;

The volume of the supplied batch, m 3;

Product sizes;

Compressive strength class;

Mark on average density;

Mark for frost resistance;

Specific effective activity of natural radionuclides;

The coefficient of thermal conductivity of products in a dry state;

Dry shrinkage;

Vapor permeability coefficient;

Number and date of issue of the quality document;

Batch number;

Designation of this standard.

7 Test methods

7.1 The dimensions and straightness of the ribs are determined according to GOST 26433.1. The depth of broken corners and ribs is determined according to GOST 21520, clause 3.3.

The difference in the lengths of the diagonals is determined by the values of the lengths of the diagonals of the two largest faces of the product, measured metal tape measure according to GOST 7502 with an error of no more than 1 mm. The largest of the two obtained values is taken as the measurement result.

7.2 The average density is determined according to GOST 12730.1.

7.3 Compressive strength is determined according to GOST 10180.

7.4 Drying shrinkage is determined according to GOST 25485, Appendix 2.

7.5 Thermal conductivity is determined according to GOST 7076.

7.6 Frost resistance is determined according to GOST 31359, Appendix B.

7.7 Vapor permeability is determined according to GOST 25898.

7.8 Specific effective activity of natural radionuclides is determined according to GOST 30108.

The presence of a correlation between the results obtained by the main and alternative methods;

The availability of verification of the information that is the basis for such a connection.

8 Transport and storage

8.1 Loading into vehicles and transportation of products is carried out in accordance with the rules for the carriage of goods in force on a particular type of transport.

Products are transported in overpacks formed using pallets and fasteners.

8.2 When transporting products, products must be protected from mechanical damage and moisture.

8.3 Products must be stored by the manufacturer and consumer on level prepared areas on linings or pallets in conditions that exclude product moisture.

8.5 Products are stacked during storage. The height of the stack should ensure the safety of products.

8.6 Loading and unloading of products from vehicles must be carried out mechanically using special load gripping devices or in another way that excludes damage to products.

Loading products "in bulk" and unloading them by dropping are not allowed.

8.7 The user is responsible for incorrect transport, unloading and storage on the construction site.

9 Instructions for use

9.1 Products are used in accordance with the requirements of current building codes, codes of practice or project documentation.

9.2 When installing products with the maximum dimensions specified in 4.2.2, small-scale mechanization should be used.

Annex A (mandatory). Rules for the selection of products for control during the organization of production and independent control tests

Annex A
(mandatory)

A.2 Representatives of all interested parties may participate in the selection of controlled items and the conduct of proof tests.

A.3 At least 12 products are selected for testing.

The number of test specimens is taken from Table A.1. Sampling is carried out no earlier than 12 hours after the end of autoclaving and unloading products from the autoclave.

Table A.1

A.4 The following methods of product selection are used: random selection, representative selection, selection of products from a stack.

A.5 Random selection is carried out in a manner in which all items have an equal probability of being selected in the sample. The required number of products is selected randomly, without paying attention to the appearance of the selected products, with the exception of products damaged during transportation, which are not allowed to be selected.

NOTE Sampling of items in the above manner is possible if the items in the sample are transported unpackaged or if they are divided into a large number of small stacks before use.

NOTE When picking items, some parts of the stack should be moved aside to allow access to the items inside the stack.

A.8 If selected devices are used in more than one test, subdivide the sample according to the number of devices used in a particular test.

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

INTERSTATE

STANDARD

Specifications

Official edition

Interstate scientific and technical commission for standardization, technical regulation and certification in construction (ISTCS)

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system. Basic Provisions” and MSN 1.01-01-96 “System of Interstate Regulatory Documents in Construction. Basic Provisions»

About the standard

1 DEVELOPED by the institute NIIZHB - a branch of the Federal State Unitary Enterprise "Research Center for Construction" with the participation of TsNIISK im. Kucherenko, MGSU, VGASU (Voronezh), OJSC LZID (Lipetsk), OJSC NLMK (Lipetsk), LLC AEROK (St. Petersburg), OJSC LKSI (city Lipetsk), OOO Reftinskoye Association Teplit (Sverdlovsk region), JSC Glavnovosibirskstroy, JSC Cottage (Samara), FSUE 211 KZhBI (Leningrad region)

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

3 ADOPTED by the Interstate Scientific and Technical Commission for Standardization, Technical Regulation and Certification in Construction (MNTKS) (Minutes No. 32 of November 21, 2007)

Short name of the country according to MK (ISO 3166) 004-97	Country code according to MK (ISO 3166) 004-97	Abbreviated name of the state construction management body
		Ministry of Urban Development
Kazakhstan		Kazstroycommittee
Kyrgyzstan		G osstroy
		Agency for Construction and Development of Territories
		Department for Regulation of Urban Planning Activities of the Ministry of Regional Development
Tajikistan		Agency for Construction and Architecture under the Government
Uzbekistan		G osarkhitektstroy

4 This standard corresponds to the European standard EN 771-4:2003 “Specification of wall blocks. Part 4: Autoclaved aerated concrete blocks" (EN 771-4:2003 "Specification for masonry units. Part 4: Autoclaved aerated concrete masonry units") regarding the conformity assessment of the quality of cellular concrete products

5 By order of the Federal Agency for Technical Regulation and Metrology dated May 21, 2008 No. 109-st, the interstate standard GOST 31360-2007 was put into effect as the national standard of the Russian Federation from January 1, 2009.

6 TO REPLACE GOST 21520-89 in terms of autoclaved cellular concrete products

Information on the entry into force (termination) of this standard is published in the index "National Standards".

Information about changes to this standard is published in the index "National standards", and the text of the changes - in the information indexes "National standards". In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"

This standard cannot be fully or partially reproduced, replicated and distributed as an official publication on the territory of the Russian Federation without the permission of the Federal Agency for Technical Regulation and Metrology

INTERSTATE STANDARD

WALL PRODUCTS, NON-REINFORCED FROM AUTOCLAVE-HARDENED CELLULAR CONCRETE

Specifications

Wall unreinforced products of cellular autoclave curing concrete. Specifications

Introduction date - 2009-01-01

1 area of use

This standard establishes technical requirements, test methods and assessment of the conformity of the quality of products with this standard based on the test results.

Note - Reinforced products from autoclaved cellular concrete are made in accordance with GOST 19010.

GOST 3560-73 Steel packing tape. Specifications

GOST 7076-99 Construction materials and products. Method for determining thermal conductivity and thermal resistance in a stationary thermal regime

GOST 7502-98 Metal measuring tapes. Specifications GOST 10180-90 Methods for determining the strength of control samples GOST 12730.1-78 Concrete. Density determination method

GOST 13015-2003 Reinforced concrete and concrete products for construction. General technical requirements. Rules for acceptance, marking, transportation and storage GOST 14192-96 Marking of goods GOST 18105-86 Concrete. Strength control rules

GOST 18343-80 Pallets for bricks and ceramic stones. Specifications GOST 19010-82 Concrete and reinforced concrete wall blocks for buildings. General specifications

GOST 21520-89 Small cellular concrete wall blocks. Specifications GOST 24104-2001 Laboratory balance. General technical requirements GOST 25485-86 Cellular concrete. Specifications

GOST 25898-83 Building materials and products. Methods for determining the resistance to vapor permeation

Official edition

GOST 26433.1-89 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. Prefabricated elements

GOST 27005-86 Light and cellular concretes. Rules for the control of average density GOST 27006-86 Concrete. Squad selection rules

GOST 30244-94 Construction materials. Test methods for combustibility GOST 30108-94 Construction materials and products. Determination of specific effective activity of natural radionuclides

GOST 31359-2007 Autoclaved cellular concrete. Specifications

Note - When using this standard, it is advisable to check the validity of the reference standards according to the "National Standards" index, compiled as of January 1 of the current year, and according to the corresponding information indexes published in the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

In this standard, the following terms are used with their respective definitions:

3.1 block: A product with a rectangular, as a rule, cross-section and a thickness slightly less than its width.

3.2 plate: A product with a rectangular cross-section, the thickness of which is significantly less than other dimensions and is unchanged throughout the product.

3.3 U-shaped block

3.4 grip pockets

3.5 technological void: A through or non-through cavity molded or drilled in a product.

3.6 nominal size: The normalized size of the product, the actual size of which corresponds to the limits of permissible deviations.

4 Technical requirements

4.1 Products must comply with the requirements of this standard and be manufactured according to the technological documentation approved by the manufacturer.

4.2 Main types and dimensions

4.2.1 Products are made in the form of blocks and plates. Blocks can be made with tongue-and-groove (lock) elements and pockets for gripping, as well as U-shaped.

Blocks can have technological through or non-through voids. The shape and dimensions of technological voids must correspond to those specified in the working documentation.

4.2.2 Products are manufactured with the maximum dimensions given in Table 1.

Table 1

In millimeters

4.2.3 Depending on the maximum deviations of dimensions, shape and appearance indicators, the products are divided into two categories, the requirements for which are given in table 2.

table 2

In millimeters

Name of indicator	The value of the indicator for products
Name of indicator
Deviation of geometric dimensions, no more than:
By lenght
By width
Height
Deviation from a rectangular shape (diagonal length difference), not

Deviation from the straightness of the ribs, no more
Depth of broken corners, no more than two on one product, no more
Depth of broken ribs on one product with a total length of not more than
twice the length of the longitudinal rib, no more

Notes

1 Corners and ribs broken off up to 3 mm deep for products of category I and up to 5 mm - for products of category II are not rejection defects.

2 The number of products with maximum deviations of geometric dimensions, shape, corners and ribs that exceed the limit should not be more than 5% of the number of products in each packaged unit.

4 The dimensions of the broken products along the groove and ridge should not exceed: in depth - 10 mm, in length - 30 mm.

An example of a symbol for a category I block, 600 long, 300 wide and 200 mm high, average density grade D500, compressive strength class B2.5, frost resistance grade F25:

Block I/ 600x ZOOx 200/D500/B2.5/F25 GOST 31360-2007

Plate I/1000 x 600 x 150/ D500/ B2.5/ F25 GOST 31360-2007

It is allowed to include additional information in the symbol for the complete identification of products.

4.3 Characteristics

4.3.1 For products, the following physical, mechanical and thermophysical characteristics are determined:

average density;

Compressive strength;

Thermal conductivity;

Dry shrinkage;

Frost resistance;

Vapor permeability.

If necessary, establish other quality indicators in accordance with GOST 4.212 or the terms of the contract.

4.3.3 Average density

4.3.3.1 The grade for the average density of cellular concrete products should not exceed D700.

4.3.4 Compressive strength

4.3.4.1 The compressive strength class of cellular concrete products must be at least B1.5.

4.3.5 Thermal conductivity

4.3.6 Frost resistance

4.3.6.1 For products subjected to alternating freezing and thawing, determine the brand of cellular concrete for frost resistance in accordance with GOST 31359.

4.3.6.2 The brand of cellular concrete products for frost resistance is assigned depending on the operating conditions of the structure and the design winter temperatures of the outdoor air in the construction area in accordance with the building design standards and is taken not lower than:

F25 - for products intended for use in external walls;

F15 - for other products.

4.3.7 Dry shrinkage

Shrinkage during drying of cellular concrete products should not exceed the values established by GOST 31359.

4.3.8 Vapor permeability

The vapor permeability of products is characterized by the coefficient of vapor permeability of cellular concrete used for the manufacture of products.

The vapor permeability coefficient of cellular concrete must comply with those given in GOST 31359.

4.3.9 The specific effective activity of natural radionuclides in products should not exceed 370 Bq/kg in accordance with GOST 30108.

4.4 Fire performance data

Products belong to the group of non-combustible materials (NG) in accordance with GOST 30244.

4.5 Material requirements

4.5.1 For the manufacture of products, structural and heat-insulating cellular concrete in accordance with GOST 31359 should be used.

4.6 Marking

4.6.1 Marking of products - according to GOST 13015 with the following additions.

4.6.2 Marking is applied to each packaging unit. Markings must be legible and weather resistant.

4.6.3 The marking must contain:

Trademark or name of the manufacturer;

Class of cellular concrete products in terms of compressive strength;

Brand of cellular concrete products by average density;

Brand of cellular concrete products for frost resistance;

Batch number;

A mark on the passage of technical control.

4.6.4 Transport marking - according to GOST 14192.

4.7 Packaging

4.7.2 Upon agreement with the consumer, other types of packaging are allowed to ensure the safety of products during transportation.

5 Safety and environmental requirements

5.1 When processing products with tools and mechanisms that cause increased dust formation (wall chasers, grinders, etc.), it is necessary to take measures to protect the respiratory system and skin.

5.2 Waste generated during the manufacture or use of products must be disposed of in accordance with the current legislation in the field of environmental protection.

6 Acceptance rules

6.1 Acceptance of products is carried out in accordance with the requirements of GOST 13015, this standard, as well as the contract for the manufacture (supply) of products.

6.3 The manufacturer is responsible for the conformity of product quality with the requirements of this standard.

The quality of products is ensured by:

Input control of raw materials used for the manufacture of products;

Operational production (technological) control;

Acceptance control of finished products;

Constantly carried out statistical factory quality control of products.

Acceptance control includes acceptance and periodic tests carried out in accordance with Table 3.

Table 3

Name of indicator	Type of test	Frequency of control	Test method
Name of indicator	delivery	Frequency of control	Test method
Dimensions, straightness of ribs		Each batch	According to GOST 26433.1
Diagonal length difference		Each batch
Depth of broken corners and ribs		Each batch	According to GOST 21520
Average density		Each batch	According to GOST 12730.1
Compressive strength		Each batch	According to GOST 10180;
Dry shrinkage		At least once a year, as well as when organizing mass production and changing raw materials	According to GOST 25485
Thermal conductivity			According to GOST 7076
Frost resistance			According to GOST 31359, appendix B
Vapor permeability			According to GOST 25898

6.4 The manufacturer conducts additional tests of products for quality indicators not established by this standard, based on the intended purpose of the product, within the time agreed with the consumer.

If more than six products do not meet the requirements of this standard in terms of size, appearance and shape, a complete control of the batch of products is carried out for these indicators.

6.6 With satisfactory results of acceptance tests of products in terms of physical and mechanical indicators, the batch is accepted.

6.7 The results of periodic tests are extended to all supplied batches of products until the next periodic tests are carried out.

6.8 The specific effective activity of natural radionuclides L Eff of products is controlled during the input control according to the documents of the enterprise - the supplier of raw materials. In the absence of data from the supplier of raw materials on the value of L eff, testing for this indicator should be carried out at least once a year and every time the supplier of raw materials is changed in accredited testing laboratories.

The rules for selecting products for testing during the organization of production and independent control are given in Appendix A.

In case of disagreement, a control check is carried out in the presence of a representative of the manufacturer. The list of controlled parameters is established by agreement of the parties.

6.14 Each batch of products is accompanied by a quality document, which indicates:

Name and address of the manufacturer;

Purpose of products;

Symbolic designation of products;

The volume of the supplied batch, m 3;

Product sizes;

Compressive strength class;

Mark on average density;

Mark for frost resistance;

Specific effective activity of natural radionuclides;

The coefficient of thermal conductivity of products in a dry state;

Dry shrinkage;

Vapor permeability coefficient;

Number and date of issue of the quality document;

Batch number;

Designation of this standard.

7 Test methods

7.1 The dimensions and straightness of the ribs are determined according to GOST 26433.1. The depth of broken corners and ribs is determined according to GOST 21520, clause 3.3.

The difference in the lengths of the diagonals is determined by the values of the lengths of the diagonals of the two largest faces of the product, measured with a metal tape measure according to GOST 7502 with an error of not more than 1 mm. The largest of the two obtained values is taken as the measurement result.