GOST 31360-2007
Group G33
INTERSTATE STANDARD
WALL PRODUCTS NON-REINFORCED
AUTOCLAVE CELLULAR CONCRETE
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 regulatory 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 product quality with this standard based on test results.
Note - Reinforced products from autoclaved cellular concrete are made in accordance with GOST 19010.
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.
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.
4.1 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 overall length no more than twice the length of the longitudinal rib, no more | ||
Notes |
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
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;
- 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 The compressive strength classes of cellular concrete products are assigned in accordance with the standards building design 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 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
4.7.1 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.
5.1 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 Wastes generated during the manufacture or use of products are subject to disposal in accordance with the current legislation in the field of protection environment.
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 during incoming inspection 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.
8.1 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 transport packages 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 should be made mechanized way with the help of special load gripping devices or in another way, excluding damage to the 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.
9.1 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)
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
The gas block is a modern porous building material, which is used to build the walls of the house. This material is absolutely safe, has sufficient strength and high resistance to fire. In this article, we will talk about the types, scope of the gas block, and also find out what autoclaved aerated concrete blocks are.
The composition of aerated concrete includes sand, lime, cement, aluminum powder, so that the product is absolutely clean and is not capable of releasing harmful toxins. Thanks to natural components, the blocks are not subject to rotting processes, are easily processed and have high thermal and sound insulation properties. Due to the simple composition, the blocks are able to breathe, it depends on the porosity and favorably affects the microclimate of the house. Each product is manufactured according to technical documentation, and GOST 31360-2007 is also taken into account.
If we consider aerated concrete and their technical characteristics, we can distinguish the following types of products:
Such a product is convenient to take and lay, it should be read, in the process of work there is a large consumption of glue, because. they need to fill in all the voids that have formed.
For information! When performing external finishing of the building, at the joints, apply a thin layer of adhesive solution on the front side of the masonry, this will create additional insulation of the seam.
Aerated concrete blocks and specifications are classified as cellular blocks. The material is a uniformly distributed closed air pores throughout the entire volume of the product. A similar technological process for the manufacture of aerated concrete blocks makes it possible to make warm, environmentally friendly material from cellular concrete. In operation, aerated concrete is simple and allows you to build structures of any configuration and complexity. Aerated concrete can be classified according to the degree of hardening, as well as the type of binder. Hardening methods are:
The properties of autoclaved and non-autoclaved concrete are similar. The difference is that the non-autoclave method of hardening is less durable and gives more shrinkage to the structure, so experts do not recommend using it as a structural material. But the advantage of not an autoclave is its use in monolithic construction.
Cement, lime, gypsum or slag are used as binders. Astringent is distinguished by type:
All products are used in the construction of residential, industrial and commercial facilities. Aerated concrete is an efficient and economical product, with which you can quickly build any building for various purposes.
The structure of cellular cement behaves well in any climatic conditions, and aerated concrete is often used as thermal insulation. Structural modules of cellular concrete are used for the construction of such wall elements as:
In addition, aerated concrete modules are often used for the restoration or rebuilding (re-planning) of various structures. Due to its low weight (minimum weight 14 kg), it is used to build walls, floors for all types of houses and even for half-timbered building types. In the construction of high-rise structures, aerated concrete is used as insulation and sound insulation; for these works, a special block is produced for laying walls and floors. The cellular block is the most common material, in addition to standard products, they also produce: floor slabs, lintels, stair steps and panels.
For information! Experts have tried to use cellular concrete in the structural elements of the foundation and basement, but their use requires a thorough study of strength and durability.
Aerated concrete blocks and their dimensions are regulated in accordance with the approved project documentation. Used in production:
Any error in the dimensions and parameters of the block reduces the laying time due to the lack of grinding and fitting.
Product sizes:
Aerated concrete modules D 400 have the following parameters:
Parameters of aerated concrete modules D 500:
For information! For fast construction with a minimum of waste, use a 400 mm wide aerated concrete smooth block.
Properly selected material will allow you to quickly and efficiently build a house of aerated concrete.
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 regulatory documents in construction. Basic provisions"
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)
Short name of the country according to MK (ISO 3166) 004-97 |
Code of the country |
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 |
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 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 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 product quality with this standard based on test results.
Note - Reinforced products from autoclaved cellular concrete are made in accordance with GOST 19010.
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.
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.
4.1 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: |
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By lenght |
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By width |
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Height |
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Deviation from a rectangular shape (diagonal length difference), no more |
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Deviation from the straightness of the ribs, no more |
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Depth of broken corners, no more than two on one product, no more |
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Depth of broken ribs on one product with a total length of no more than twice the length of the longitudinal rib, no more |
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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. |
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
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.
4.3.2 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 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 should be used in accordance with GOST 31359.
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.
5.1 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.
6.1 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;
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 |
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Acceptance |
Periodic |
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Dimensions, straightness of ribs |
Each batch |
According to GOST 26433.1 |
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Diagonal length difference |
Each batch |
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Depth of broken corners and ribs |
Each batch |
According to GOST 21520 |
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Average density |
Each batch |
According to GOST 12730.1 |
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Compressive strength |
Each batch |
According to GOST 10180 |
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Dry shrinkage |
At least once a year, as well as when organizing mass production and changing raw materials |
According to GOST 25485 |
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Thermal conductivity |
According to GOST 7076 |
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Frost resistance |
According to GOST 31359, appendix B |
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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 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 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.
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;
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.
7.1 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.
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.
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 the information that is the basis for such a connection.
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 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.
9.1 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)
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
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.
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.
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*Probably an original error. You should read GOST 25485-89 Cellular concrete. Technical conditions, hereinafter in the text. - Database manufacturer's note.
The value of the indicator for products | ||
Notes 1 Corners and ribs broken off with a depth of up to 3 mm 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. |
Type of test | Inspection frequency Test method|