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STATE STANDARD OF THE USSR UNION

NON-HARDENING CONSTRUCTION SEALING MASTIC

TECHNICAL CONDITIONS

STATE CONSTRUCTION COMMITTEE OF THE USSR

Moscow

STATE STANDARD OF THE USSR UNION

Resolution State Committee USSR Construction Affairs dated May 22, 1979 No. 71, the introduction date is set

from 01.01.81

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass made on the basis of polyisobutylene, ethylene propylene, isoprene and butyl rubbers, fillers and plasticizers.

Non-hardening mastic is intended for sealing closed and drained joints of external walls and for sealing the junctions of window and door blocks with wall elements while maintaining properties in the temperature range from minus 50 to plus 70 ° C, with a width of the sealed joint in the range of 10 - 30 mm and relative deformation of non-hardening mastic in the seam is no more than 10%.

1. TECHNICAL REQUIREMENTS

1.1. Sealing non-hardening mastic must be manufactured in accordance with the requirements of this standard for technological regulations, approved in in the prescribed manner.

1.2. In terms of physical and mechanical properties, the mastic must comply with the standards specified in the table.

1.3. In appearance, the mastic must be uniform, and more than two inclusions with a diameter of more than 1 mm are not allowed on the cross-section of the briquette.

1.4. The materials used for the manufacture of mastic must comply with the requirements of regulatory and technical documentation for these materials.

2. ACCEPTANCE RULES

2.1. The mastic is taken in batches. The batch size is set in the amount of no more than shift production on one production line.

2.2. To check the compliance of the mastic with the requirements of this standard, 3%, but not less than 3 containers, are selected from each batch. One briquette is taken from each container.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, flow at 70 ° C and appearance, check for the mastic included in each batch.

2.4. Determination of the relative elongation at minus 50 °C and the nature of destruction of the mastic is carried out every time its formulation is changed, but at least once a year.

2.5. If the test results are unsatisfactory for at least one of the indicators provided for by this standard, repeated tests are carried out for this indicator on a double number of samples taken from the same batch.

If the results of repeated tests are unsatisfactory, the batch of mastic is not subject to acceptance.

If, upon acceptance of a mastic that has been assigned the State Quality Mark in the prescribed manner, it turns out that it does not satisfy at least one of the indicators provided for by this standard, then the mastic will be accepted according to highest category quality is not subject to.

2.6. The consumer has the right to conduct a quality control check of the mastic in accordance with the requirements of this standard.

3. TEST METHODS

3.1. Before making test samples, the mastic is kept for at least 18 hours at a temperature of (20 ± 2) °C.

3.2. For each type of test, at least three samples are made (one sample from each briquette).

3.3. Tests of mastic samples are carried out at a temperature of (20 ± 2) °C after preliminary holding them at this temperature for at least 3 hours.

3.4. The value of the mastic indicator is calculated as the arithmetic mean of the test results of three or more samples, and the deviation of each of the results from the average value should be no more than 10%.

3.5. Determination of tensile strength, elongation at maximum load and failure mode

3.5.1. Equipment

Tests are carried out on a tensile testing machine in accordance with GOST 7762-74, equipped with a device for measuring elongation and special grips, the diagram of which is shown in Fig. 1.

The tensile testing machine must provide:

load measurement with an error of no more than 1.0%;

constant speed of movement of the grippers (1 ± 0.5) and (10 ± 2.0) mm/min.

The device for measuring elongation must have a reading device division value of no more than 0.1 mm and a measurement error of no more than 1.0%.

To determine the nature of the destruction of the sample, a stencil is used, the diagram of which is shown in Fig. 2.

3.5.2. Preparing samples for testing

To make mastic joint samples, tiles of grade 200 concrete with dimensions of 50´50´25 mm, prepared and aged for three months, are used.

Reuse of used concrete tiles is allowed provided that a layer of concrete at least 1 mm thick is removed from their surface adjacent to the mastic.

Mastic heated to 70°C is applied in the form of a roller to the middle concrete tiles and pressed on both sides with wooden limiting strips 20 mm high and 50 mm long to a plan size of 30´50 mm.

To prevent the mastic from sticking to wooden planks they must be lubricated on the side adjacent to the mastic mineral oil and sprinkled with filler used to make mastic. The mastic roller is pressed on top with a second concrete tile until it becomes rectangular shape dimensions 30x50x20 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Carrying out the test

The samples are placed in the grips of a tensile testing machine and stretched (at a moving grip speed of 10 mm/min) until they break; At the same time, a “load-strain” diagram is recorded.

The amount of elongation of the sample at maximum load is determined from the load-strain diagram.

With absence recorders the elongation of the sample must be measured with a dial indicator with a division value of no more than 0.1 mm.

Tensile strength R p in kgf/cm2 is calculated using the formula

S- area of ​​the initial cross-section of the sample, cm 2.

Relative elongation in % is calculated by the formula

Where h- distance between concrete tiles before testing, mm;

Sample elongation at maximum load, mm.

To determine the nature of destruction, concrete tiles are freed from grips, the bulk of the mastic is cut off with a knife moistened with water, so that a layer of mastic of no more than 3 mm remains on their surface. A stencil is applied to the place where the mastic is torn off from the surface of the concrete tile to which it was glued (Fig. 2) and the area of ​​the tear is calculated.

When the mastic is torn off from a concrete tile in an area of ​​no more than 10% of the total area of ​​the sample, the nature of the destruction is considered cohesive.

3.6. Determination of water absorption

The essence of the method is to determine the mass of water absorbed by a mastic sample when it is kept in water for a specified time.

3.6.1. To determine water absorption, mastic heated to 70°C (about 10 g) is applied in an even layer on a glass plate or plastic film 50x50 mm in size, pre-weighed with an error of 0.001 g.

Samples with mastic are weighed with an error of 0.001 g and kept in water for 24 hours at a temperature of (20±2)°C. Upon removal from the water, the samples are blotted with filter paper and weighed again with the same error.

3.6.2. Water absorption W in % calculated by the formula

Where g 0 - mass of the sample before testing, g;

g 1 - mass of the sample after testing, g;

m- mass of mastic, g.

3.7. Determination of consistency

The consistency of the mastic is characterized by the depth of immersion of a standard cone with a total mass of 150 g into the mastic at a given temperature and for a set time.

The immersion depth of the cone is determined in accordance with the requirements of GOST 5346-78, while the vessel specified in the standard is filled with mastic heated to 70 ° C so that no air bubbles form in it, and kept for 3 hours at a temperature of (20 ± 2) ° WITH.

3.8. Determination of mastic drainage at 70°C (heat resistance)

The essence of the method is to determine the amount of mastic flow under the influence of its own weight at a given temperature and time.

3.8.1. For testing, a tray is used, the diagram of which is shown in Fig. 3.

The tray must be made of tinplate with a thickness of 1.0 - 1.4 mm. Before filling the tray, the mastic is preliminarily kept for about 1 hour in a thermostat at a temperature of 70°C. Then the tray is tightly filled with mastic so that the mastic protrudes slightly above the top and end edges of the side walls.

After keeping the filled tray in a horizontal position for 3 hours at a temperature of (20 ± 2) °C, the protruding mastic is cut off flush with the top and end edges of the side walls of the tray.

A rod is inserted into the ears of the tray, the tray is placed in the thermostat in vertical position with the protruding part facing down and kept at a temperature of 70°C for 24 hours.

3.8.2. After 24 hours, the tray is removed from the thermostat and placed horizontally. Along the protruding part of the tray, on which marks are marked with a division value of 1.0 mm, move a block measuring 40´40´60 mm until it comes into contact with the mastic and measure the gap in millimeters between the lower end edge of the side walls of the tray and the block.

3.9. Determination of relative elongation at a temperature of 50°C

3.9.1. Tests are carried out on a tensile testing machine specially equipped with a cryochamber, the requirements for which are given in clause 3.5.1, at a moving clamp speed of (1.0±0.5) mm/min.

Samples are prepared for testing in accordance with the requirements given in clause 3.5.2.

The prepared samples are kept for 1 hour in a cryochamber at a temperature of minus 50 °C.

The sample is tested 15 minutes after it is secured in the grips of the tensile testing machine.

When the specimen elongation reaches a value corresponding to 7% of the initial distance between the concrete tiles, the test is stopped.

The determination of the relative elongation of a sample at a temperature of minus 50°C was carried out by the VNIIstroypolymer Institute of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Determination of uniformity

3.10.1. The uniformity of the mastic is determined visually in the briquette section.

3.11. Determination of plasticizer migration

For testing, a brass ring with a height of 5 mm and an outer diameter of 25 mm is used, internal diameter 20 mm and filter paper according to GOST 12026-76.

To determine the migration of the plasticizer, a layer of filter paper is placed on a glass plate and a brass ring is placed on it. The ring is filled with the test mastic.

The prepared samples are kept in a thermostat at (100 ± 5°C) for 4 hours. After removing the samples from the thermostat, no traces of plasticizer should be found on the filter paper.

4. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. The mastic is packaged in rectangular briquettes with a cross-section of 60´30 mm and a length of up to 500 mm, which are wrapped in polyethylene film with a thickness of no more than 40 microns in accordance with GOST 10354-82.

At the consumer's request, it is allowed to pack the mastic into briquettes with a diameter of 30 - 50 mm and a length of no more than 150 cm. The briquettes are packed in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, the mastic may be packaged in a different container.

The gross weight of one container must be no more than 50 kg.

4.2. The marking of the container must comply with the requirements of GOST 14192-77. Each container must be affixed with a label indicating:

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

shelf life of mastic;

4.3. The manufacturer must accompany each shipment of mastic with instructions for use and a document in the prescribed form, which must indicate:

name of the organization subordinate to which the manufacturer is located;

name and address of the manufacturer or its trademark;

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

results of physical and mechanical tests;

designation of this standard.

4.4. All shipping documentation for mastics of the highest quality category must have an image of the state Quality Mark, awarded in the manner established by the USSR State Standard.

4.5. Mastic may be transported by any type of transport under conditions that protect it from exposure to precipitation, sun rays and mechanical damage.

4.6. To protect the mastic from exposure to sunlight and precipitation, it should be stored indoors.

4.7. During transportation and storage, throwing containers with mastic is prohibited.

5. INSTRUCTIONS FOR USE

5.1. Sealing non-hardening mastic must be used in accordance with the instructions for its use.

5.2. Before use, the mastic must be kept at a temperature of (20 ± 2) °C for at least 24 hours.

6. MANUFACTURER WARRANTY

6.1. The manufacturer must guarantee compliance of the mastic with the requirements of this standard, subject to the conditions of transportation, storage and operation.

6.2. The guaranteed shelf life of the mastic is one year from the date of manufacture.

6.3. After warranty period Storage of mastic before use must be checked for compliance with the requirements of this standard.

/ GOST 14791-79 (1990)

Updated: 02/09/2006

GOST 14791-79

UDC 691.58:006.354 Group Zh15

STATE STANDARD OF THE USSR UNION

SEALING MASTIC

NON-HARDENING CONSTRUCTION

Specifications

Sealing non-hardening building mastic.

Specifications

OKP 57 7541

Date of introduction 1981-01-01

APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated May 22, 1979 No. 71

INSTEAD GOST 14791-69, GOST 5.2129-73

REISSUE. August 1990

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass made on the basis of polyisobutylene, ethylene propylene, isoprene and butyl rubbers, fillers and plasticizers.

Non-hardening mastic is intended for sealing closed and drained joints of external walls and for sealing the junctions of window and door blocks with wall elements while maintaining properties in the temperature range from minus 50 to 70C, with a width of the sealed joint within 10-30 mm and relative deformation of the non-hardening mastic in the seam no more than 10%.

1. Technical requirements

1.1. Sealing non-hardening mastic must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2. In terms of physical and mechanical properties, the mastic must comply with the standards specified in the table.

1.3. In appearance, the mastic must be uniform, and more than two inclusions with a diameter of more than 1 mm are not allowed on the cross-section of the briquette.

1.4. The materials used for the manufacture of mastic must comply with the requirements of regulatory and technical documentation for these materials.

2. Acceptance rules

2.1. The mastic is taken in batches. The batch size is set in the amount of no more than shift production on one production line.

2.2. To check the compliance of the mastic with the requirements of this standard, 3%, but not less than 3 containers, are selected from each batch. One briquette is taken from each container.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, flow at 70C and appearance are checked for the mastic included in each batch.

2.4. Determination of the relative elongation at minus 50C and the nature of destruction of the mastic is carried out every time its formulation is changed, but at least once a year.

2.5. If the test results are unsatisfactory for at least one of the indicators provided for by this standard, repeated tests are carried out for this indicator on a double number of samples taken from the same batch.

If the results of repeated tests are unsatisfactory, the batch of mastic is not subject to acceptance.

If, upon acceptance of a mastic that has been assigned the State Quality Mark in the prescribed manner, it turns out that it does not satisfy at least one of the indicators provided for by this standard, then the mastic is not subject to acceptance under the highest quality category.

2.6. The consumer has the right to conduct a quality control check of the mastic in accordance with the requirements of this standard.

3. Test methods

3.1. Before making test samples, the mastic is kept for at least 18 hours at a temperature of (202) C.

3.2. For each type of test, at least three samples are made (one sample from each briquette).

3.3. Tests of mastic samples are carried out at a temperature of (202) C after preliminary holding them at this temperature for at least 3 hours.

3.4. The value of the mastic index is calculated as the arithmetic mean of the test results of three or more samples, and the deviation of each of the results from the average value should be no more than 10%.

3.5. Determination of tensile strength, elongation at maximum load and failure mode

3.5.1. Equipment

Tests are carried out on a tensile testing machine in accordance with GOST 7762-74, equipped with a device for measuring elongation and special grips, the diagram of which is shown in Fig. 1.

Damn.1

The tensile testing machine must provide:

load measurement with an error of no more than 1.0%;

constant speed of movement of the grippers (10.5) and (102.0) mm/min.

The device for measuring elongation must have a reading device division value of no more than 0.1 mm and a measurement error of no more than 1.0%.

To determine the nature of the destruction of the sample, a stencil is used, the diagram of which is shown in Fig. 2.

Crap. 2

3.5.2. Preparing samples for testing

To make mastic joint samples, tiles of grade 200 concrete measuring 50x50x25 mm, prepared and aged for three months, are used.

Reuse of used concrete tiles is allowed provided that a layer of concrete at least 1 mm thick is removed from their surface adjacent to the mastic.

Mastic heated to 70C is applied in the form of a roller to the middle of the concrete tile and pressed on both sides with wooden limiting strips 20 mm high and 50 mm long to a plan size of 30X50 mm.

To prevent the mastic from sticking to the wooden planks, they should be lubricated with mineral oil on the side adjacent to the mastic and sprinkled with the filler used to make the mastic. The mastic roller is pressed on top with a second concrete tile until it is given a rectangular shape with dimensions of 30x50x20 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Testing

The samples are placed in the grips of a tensile testing machine and stretched (at a moving grip speed of 10 mm/min) until they break; At the same time, a load-strain diagram is recorded.

The elongation value of the sample at maximum load is determined from the load-strain diagram.

In the absence of recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of no more than 0.1 mm.

Tensile strength in kgf/cm2 is calculated using the formula

S is the area of ​​the initial cross-section of the sample, cm 2.

Relative elongation in % is calculated by the formula

where h is the distance between concrete tiles before testing, mm;

D h is the elongation of the sample at maximum load, mm.

To determine the nature of destruction, concrete tiles are freed from grips, the bulk of the mastic is cut off with a knife moistened with water, so that a layer of mastic of no more than 3 mm remains on their surface. A stencil is applied to the place where the mastic is torn off from the surface of the concrete tile to which it was glued (Fig. 2) and the area of ​​the tear is calculated.

When the mastic is torn off from a concrete tile in an area of ​​no more than 10% of the total area of ​​the sample, the nature of the destruction is considered cohesive.

3.6. Determination of water absorption

The essence of the method is to determine the mass of water absorbed by a mastic sample when it is kept in water for a specified time.

3.6.1. To determine water absorption, mastic heated to 70C (about 10 g) is applied in an even layer on a glass plate or polyethylene film measuring 50x50 mm, pre-weighed with an error of 0.001 g.

Samples with mastic are weighed with an error of 0.001 g and kept in water for 24 hours at a temperature of (202) C. Upon removal from the water, the samples are blotted with filter paper and weighed again with the same error.

3.6.2. Water absorption W in% is calculated using the formula

,

where is the mass of the sample before testing, g;

Sample mass after testing, g;

m - mass of mastic, g.

3.7. Determination of consistency

The consistency of the mastic is characterized by the depth of immersion of a standard cone with a total mass of 150 g into the mastic at a given temperature and for a set time.

The immersion depth of the cone is determined in accordance with the requirements of GOST 5346-78, while the vessel specified in the standard is filled with mastic heated to 70C so that no air bubbles form in it, and kept for 3 hours at a temperature of (202)C.

3.8. Determination of mastic drainage at 70C (heat resistance)

The essence of the method is to determine the amount of mastic flow under the influence of its own weight at a given temperature and time.

3.8.1. For testing, a tray is used, the diagram of which is shown in Fig. 3.

Crap. 3

The tray should be made of tinplate with a thickness of 1.0-1.4 mm. Before filling the tray, the mastic is preliminarily kept for about 1 hour in a thermostat at a temperature of 70C. Then the tray is tightly filled with mastic so that the mastic protrudes slightly above the top and end edges of the side walls.

After keeping the filled tray in a horizontal position for 3 hours at a temperature of (20 2) C, the protruding mastic is cut off flush with the top and end edges of the side walls of the tray.

A rod is inserted into the ears of the tray, the tray is placed in a thermostat in a vertical position with the protruding part down and kept at a temperature of 70C for 24 hours.

3.8.2. After 24 hours, the tray is removed from the thermostat and placed horizontally. Along the protruding part of the tray, on which marks are marked with a division value of 1.0 mm, move a block measuring 40x40x60 mm until it comes into contact with the mastic and measure the gap in millimeters between the lower end edge of the side walls of the tray and the block.

3.9. Determination of relative elongation at a temperature of 50C

3.9.1. Tests are carried out on a tensile testing machine specially equipped with a cryochamber, the requirements for which are given in clause 3.5.1, at a moving clamp speed of (1.00.5) mm/min.

Samples are prepared for testing in accordance with the requirements given in clause 3.5.2.

The prepared samples are kept for 1 hour in a cryochamber at a temperature of minus 50C.

The sample is tested 15 minutes after it is secured in the grips of the tensile testing machine.

When the specimen elongation reaches a value corresponding to 7% of the initial distance between the concrete tiles, the test is stopped.

The determination of the relative elongation of a sample at a temperature of minus 50C was carried out by the VNIIstroypolymer Institute of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Determination of uniformity

3.10.1. The uniformity of the mastic is determined visually in the briquette section.

3.11. Determination of plasticizer migration

For testing, a brass ring with a height of 5 mm, an outer diameter of 25 mm, an inner diameter of 20 mm and filter paper in accordance with GOST 12026-76 are used.

To determine the migration of the plasticizer, a layer of filter paper is placed on a glass plate and a brass ring is placed on it. The ring is filled with the test mastic.

The prepared samples are kept in a thermostat at (1005C) for 4 hours. After removing the samples from the thermostat, no traces of plasticizer should be found on the filter paper.

4. Labeling, packaging, transportation and storage

4.1. The mastic is packaged in rectangular briquettes with a cross-section of 60x30 mm and a length of up to 500 mm, which are wrapped in polyethylene film with a thickness of no more than 40 microns in accordance with GOST 10354-82.

At the request of the consumer, it is allowed to pack the mastic into briquettes with a diameter of 30-50 mm and a length of no more than 150 cm.

Briquettes are packaged in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, the mastic may be packaged in a different container.

The gross weight of one container must be no more than 50 kg.

4.2. The marking of the container must comply with the requirements of GOST 14192-77. Each container must be affixed with a label indicating:

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

shelf life of mastic;

4.3. The manufacturer must accompany each shipment of mastic with instructions for use and a document in the prescribed form, which must indicate:

name of the organization subordinate to which the manufacturer is located;

name and address of the manufacturer or its trademark;

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

results of physical and mechanical tests;

designation of this standard.

4.4. All shipping documentation for mastics of the highest quality category must have an image of the state Quality Mark, awarded in the manner established by the USSR State Standard.

4.5. Mastic can be transported by any type of transport under conditions that protect it from exposure to precipitation, sunlight and mechanical damage.

4.6. To protect the mastic from exposure to sunlight and precipitation, it should be stored indoors.

4.7. During transportation and storage, throwing containers with mastic is prohibited.

5. Directions for use

5.1. Sealing non-hardening mastic must be used in accordance with the instructions for its use.

5.2. Before use, the mastic must be kept at a temperature of (202) C for at least 24 hours.

6. Manufacturer's warranty

6.1. The manufacturer must guarantee compliance of the mastic with the requirements of this standard, subject to the conditions of transportation, storage and operation.

6.2. The guaranteed shelf life of the mastic is one year from the date of manufacture.

6.3. After the warranty period has expired, the mastic must be checked for compliance with the requirements of this standard before use.>

STATE STANDARD OF THE USSR UNION

NON-HARDENING CONSTRUCTION SEALING MASTIC

TECHNICAL CONDITIONS

GOST 14791-79

STATE CONSTRUCTION COMMITTEE OF THE USSR

STATE STANDARD OF THE USSR UNION

By Decree of the USSR State Committee for Construction Affairs dated May 22, 1979 No. 71, the implementation period was established

from 01.01.81

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass made on the basis of polyisobutylene, ethylene propylene, isoprene and butyl rubbers, fillers and plasticizers.

Non-hardening mastic is intended for sealing closed and drained joints of external walls and for sealing the junction of window and door blocks with wall elements while maintaining properties in the temperature range from minus 50 to plus 70 ° C, with the width of the sealed joint in the range of 10-30 mm and the relative deformation of the non-hardening mastic in the joint not exceeding 10%.

1. TECHNICAL REQUIREMENTS

1.1. Sealing non-hardening mastic must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2. In terms of physical and mechanical properties, the mastic must comply with the standards specified in the table.

1.3. In appearance, the mastic must be uniform, and more than two inclusions with a diameter of more than 1 mm are not allowed on the cross-section of the briquette.

1.4. The materials used for the manufacture of mastic must comply with the requirements of regulatory and technical documentation for these materials.

2. ACCEPTANCE RULES

2.1. The mastic is taken in batches. The batch size is set in the amount of no more than shift production on one production line.

2.2. To check the compliance of the mastic with the requirements of this standard, 3%, but not less than 3 containers, are selected from each batch. One briquette is taken from each container.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 70 ° C and appearance are checked for the mastic included in each batch.

2.4. Determination of relative elongation at minus 50 ° C and the nature of destruction of the mastic is carried out every time its recipe is changed, but at least once a year.

2.5. If the test results are unsatisfactory for at least one of the indicators provided for by this standard, repeated tests are carried out for this indicator on a double number of samples taken from the same batch.

If the results of repeated tests are unsatisfactory, the batch of mastic is not subject to acceptance.

If, upon acceptance of a mastic that has been assigned the State Quality Mark in the prescribed manner, it turns out that it does not satisfy at least one of the indicators provided for by this standard, then the mastic is not subject to acceptance under the highest quality category.

2.6. The consumer has the right to conduct a quality control check of the mastic in accordance with the requirements of this standard.

3. TEST METHODS

3.1. Before making test samples, the mastic is kept for at least 18 hours at a temperature (20 ± 2) ° WITH.

3.2. For each type of test, at least three samples are made (one sample from each briquette).

3.3. Testing of mastic samples is carried out at a temperature (20 ± 2) ° After preliminary holding them at this temperature for at least 3 hours.

3.4. The value of the mastic indicator is calculated as the arithmetic mean of the test results of three or more samples, and the deviation of each of the results from the average value should be no more than 10%.

3.5. Determination of tensile strength, elongation at maximum load and failure mode

3.5.1. Equipment

Tests are carried out on a tensile testing machine in accordance with GOST 7762-74, equipped with a device for measuring elongation and special grips, the diagram of which is shown in Fig. 1.

The tensile testing machine must provide:

load measurement with an error of no more than 1.0%;

constant speed of movement of the grippers (1 ± 0.5) and (10 ± 2.0) mm/min.

The device for measuring elongation must have a reading device division value of no more than 0.1 mm and a measurement error of no more than 1.0%.

To determine the nature of the destruction of the sample, a stencil is used, the diagram of which is shown in Fig. 2.

3.5.2. Preparing samples for testing

To make mastic joint samples, tiles of grade 200 concrete measuring 50x50x25 mm, prepared and aged for three months, are used.

Reuse of used concrete tiles is allowed provided that a layer of concrete at least 1 mm thick is removed from their surface adjacent to the mastic.

Preheated to 70 ° The mastic is applied in the form of a roller to the middle of the concrete slab and pressed on both sides with wooden limiting strips 20 mm high and 50 mm long to a plan size of 30x50 mm.

To prevent the mastic from sticking to the wooden planks, they should be lubricated with mineral oil on the side adjacent to the mastic and sprinkled with the filler used to make the mastic. The mastic roller is pressed on top with a second concrete tile until it is given a rectangular shape measuring 30x50x20 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Carrying out the test

The samples are placed in the grips of a tensile testing machine and stretched (at a moving grip speed of 10 mm/min) until they break; At the same time, a “load-strain” diagram is recorded.

The amount of elongation of the sample at maximum load is determined from the load-strain diagram.

In the absence of recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of no more than 0.1 mm.

Tensile strength R p in kgf/cm2 is calculated using the formula

S- area of ​​the initial cross-section of the sample, cm 2.

Relative elongation in % is calculated by the formula

Where h- distance between concrete tiles before testing, mm;

Sample elongation at maximum load, mm.

To determine the nature of destruction, concrete tiles are freed from grips, the bulk of the mastic is cut off with a knife moistened with water, so that a layer of mastic of no more than 3 mm remains on their surface. A stencil is applied to the place where the mastic is torn off from the surface of the concrete tile to which it was glued (Fig. 2) and the area of ​​the tear is calculated.

When the mastic is torn off from a concrete tile in an area of ​​no more than 10% of the total area of ​​the sample, the nature of the destruction is considered cohesive.

3.6. Determination of water absorption

The essence of the method is to determine the mass of water absorbed by a mastic sample when it is kept in water for a specified time.

3.6.1. To determine water absorption, heated to 70 ° Mastic (about 10 g) is applied in an even layer on a glass plate or polyethylene film measuring 50x50 mm, pre-weighed with an error of 0.001 g.

Samples with mastic are weighed with an error of 0.001 g and kept in water for 24 hours at a temperature (20 ± 2)° C. Upon removal from the water, the samples are blotted with filter paper and weighed again with the same error.

3.6.2. Water absorption W in % calculated by the formula

,

Where g 0 - mass of the sample before testing, g;

g 1 - mass of the sample after testing, g;

m- mass of mastic, g.

3.7. Determination of consistency

The consistency of the mastic is characterized by the depth of immersion of a standard cone with a total mass of 150 g into the mastic at a given temperature and for a set time.

The immersion depth of the cone is determined in accordance with the requirements of GOST 5346-78, while the vessel specified in the standard is filled with heated to 70 ° With mastic so that no air bubbles form in it, and incubate for 3 hours at a temperature (20 ± 2) ° WITH.

3.8. Determination of mastic drainage at 70° C (heat resistance)

The essence of the method is to determine the amount of mastic flow under the influence of its own weight at a given temperature and time.

3.8.1. For testing, a tray is used, the diagram of which is shown in Fig. 3.

The tray should be made of tinplate with a thickness of 1.0-1.4 mm. Before filling the tray, the mastic is preliminarily kept for about 1 hour in a thermostat at a temperature of 70 ° C. Then the tray is tightly filled with mastic so that the mastic protrudes slightly above the top and end edges of the side walls.

After holding the filled tray in a horizontal position for 3 hours at a temperature (20 ± 2) ° The protruding mastic is cut off flush with the top and end edges of the side walls of the tray.

A rod is inserted into the ears of the tray, the tray is placed in a thermostat in a vertical position with the protruding part down and kept at a temperature of 70 ° C within 24 hours.

3.8.2. After 24 hours, the tray is removed from the thermostat and placed horizontally. Along the protruding part of the tray, on which marks are marked with a division value of 1.0 mm, move a block measuring 40x40x60 mm until it comes into contact with the mastic and measure the gap in millimeters between the lower end edge of the side walls of the tray and the block.

3.9. Determination of relative elongation at a temperature of 50° WITH

3.9.1. Tests are carried out on a tensile testing machine specially equipped with a cryochamber, the requirements for which are given in clause 3.5.1, at a speed of movement of the movable clamp (1.0 ± 0.5) mm/min.

Samples are prepared for testing in accordance with the requirements given in clause 3.5.2.

The prepared samples are kept for 1 hour in a cryochamber at a temperature of minus 50 ° WITH.

The sample is tested 15 minutes after it is secured in the grips of the tensile testing machine.

When the specimen elongation reaches a value corresponding to 7% of the initial distance between the concrete tiles, the test is stopped.

Determination of the relative elongation of a sample at a temperature of minus 50 ° It was carried out by the VNIIstroypolymer Institute of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Determination of uniformity

3.10.1. The uniformity of the mastic is determined visually in the briquette section.

3.11. Determination of plasticizer migration

For testing, a brass ring with a height of 5 mm, an outer diameter of 25 mm, an inner diameter of 20 mm and filter paper in accordance with GOST 12026-76 are used.

To determine the migration of the plasticizer, a layer of filter paper is placed on a glass plate and a brass ring is placed on it. The ring is filled with the test mastic.

The prepared samples are kept in a thermostat at (100 ± 5° C) within 4 hours. After removing the samples from the thermostat, no traces of plasticizer should be found on the filter paper.

4. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. The mastic is packaged in rectangular briquettes with a cross-section of 60x30 mm and a length of up to 500 mm, which are wrapped in polyethylene film with a thickness of no more than 40 microns in accordance with GOST 10354-82.

At the request of the consumer, it is allowed to pack the mastic into briquettes with a diameter of 30-50 mm and a length of no more than 150 cm. The briquettes are packaged in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, the mastic may be packaged in a different container.

The gross weight of one container must be no more than 50 kg.

4.2. The marking of the container must comply with the requirements of GOST 14192-77. Each container must be affixed with a label indicating:

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

shelf life of mastic;

4.3. The manufacturer must accompany each shipment of mastic with instructions for use and a document in the prescribed form, which must indicate:

name of the organization subordinate to which the manufacturer is located;

name and address of the manufacturer or its trademark;

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

results of physical and mechanical tests;

designation of this standard.

4.4. All shipping documentation for mastics of the highest quality category must have an image of the state Quality Mark, awarded in the manner established by the USSR State Standard.

4.5. Mastic can be transported by any type of transport under conditions that protect it from exposure to precipitation, sunlight and mechanical damage.

4.6. To protect the mastic from exposure to sunlight and precipitation, it should be stored indoors.

4.7. During transportation and storage, throwing containers with mastic is prohibited.

5. INSTRUCTIONS FOR USE

5.1. Sealing non-hardening mastic must be used in accordance with the instructions for its use.

5.2. Before use, the mastic must be kept at a temperature (20 ± 2) ° With at least 24 hours.

6. MANUFACTURER WARRANTY

6.1. The manufacturer must guarantee compliance of the mastic with the requirements of this standard, subject to the conditions of transportation, storage and operation.

6.2. The guaranteed shelf life of the mastic is one year from the date of manufacture.

6.3. After the warranty period has expired, the mastic must be checked for compliance with the requirements of this standard before use.

STATE STANDARD OF THE USSR UNION

NON-HARDENING CONSTRUCTION SEALING MASTIC

TECHNICAL CONDITIONS

GOST 14791-79

STATE CONSTRUCTION COMMITTEE OF THE USSR

STATE STANDARD OF THE USSR UNION

By Decree of the USSR State Committee for Construction Affairs dated May 22, 1979 No. 71, the implementation period was established

from 01.01.81

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass made on the basis of polyisobutylene, ethylene propylene, isoprene and butyl rubbers, fillers and plasticizers.

Non-hardening mastic is intended for sealing closed and drained joints of external walls and for sealing the junction of window and door blocks with wall elements while maintaining properties in the temperature range from minus 50 to plus 70 ° C, with the width of the sealed joint in the range of 10-30 mm and the relative deformation of the non-hardening mastic in the joint not exceeding 10%.

1. TECHNICAL REQUIREMENTS

1.1. Sealing non-hardening mastic must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

1.2. In terms of physical and mechanical properties, the mastic must comply with the standards specified in the table.

1.3. In appearance, the mastic must be uniform, and more than two inclusions with a diameter of more than 1 mm are not allowed on the cross-section of the briquette.

1.4. The materials used for the manufacture of mastic must comply with the requirements of regulatory and technical documentation for these materials.

2. ACCEPTANCE RULES

2.1. The mastic is taken in batches. The batch size is set in the amount of no more than shift production on one production line.

2.2. To check the compliance of the mastic with the requirements of this standard, 3%, but not less than 3 containers, are selected from each batch. One briquette is taken from each container.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 70 ° C and appearance are checked for the mastic included in each batch.

2.4. Determination of relative elongation at minus 50 ° C and the nature of destruction of the mastic is carried out every time its recipe is changed, but at least once a year.

2.5. If the test results are unsatisfactory for at least one of the indicators provided for by this standard, repeated tests are carried out for this indicator on a double number of samples taken from the same batch.

If the results of repeated tests are unsatisfactory, the batch of mastic is not subject to acceptance.

If, upon acceptance of a mastic that has been assigned the State Quality Mark in the prescribed manner, it turns out that it does not satisfy at least one of the indicators provided for by this standard, then the mastic is not subject to acceptance under the highest quality category.

2.6. The consumer has the right to conduct a quality control check of the mastic in accordance with the requirements of this standard.

3. TEST METHODS

3.1. Before making test samples, the mastic is kept for at least 18 hours at a temperature (20 ± 2) ° WITH.

3.2. For each type of test, at least three samples are made (one sample from each briquette).

3.3. Testing of mastic samples is carried out at a temperature (20 ± 2) ° After preliminary holding them at this temperature for at least 3 hours.

3.4. The value of the mastic indicator is calculated as the arithmetic mean of the test results of three or more samples, and the deviation of each of the results from the average value should be no more than 10%.

3.5. Determination of tensile strength, elongation at maximum load and failure mode

3.5.1. Equipment

Tests are carried out on a tensile testing machine in accordance with GOST 7762-74, equipped with a device for measuring elongation and special grips, the diagram of which is shown in Fig. 1.

The tensile testing machine must provide:

load measurement with an error of no more than 1.0%;

constant speed of movement of the grippers (1 ± 0.5) and (10 ± 2.0) mm/min.

The device for measuring elongation must have a reading device division value of no more than 0.1 mm and a measurement error of no more than 1.0%.

To determine the nature of the destruction of the sample, a stencil is used, the diagram of which is shown in Fig. 2.

3.5.2. Preparing samples for testing

To make mastic joint samples, tiles of grade 200 concrete measuring 50x50x25 mm, prepared and aged for three months, are used.

Reuse of used concrete tiles is allowed provided that a layer of concrete at least 1 mm thick is removed from their surface adjacent to the mastic.

Preheated to 70 ° The mastic is applied in the form of a roller to the middle of the concrete slab and pressed on both sides with wooden limiting strips 20 mm high and 50 mm long to a plan size of 30x50 mm.

To prevent the mastic from sticking to the wooden planks, they should be lubricated with mineral oil on the side adjacent to the mastic and sprinkled with the filler used to make the mastic. The mastic roller is pressed on top with a second concrete tile until it is given a rectangular shape measuring 30x50x20 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Carrying out the test

The samples are placed in the grips of a tensile testing machine and stretched (at a moving grip speed of 10 mm/min) until they break; At the same time, a “load-strain” diagram is recorded.

The amount of elongation of the sample at maximum load is determined from the load-strain diagram.

In the absence of recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of no more than 0.1 mm.

Tensile strength R p in kgf/cm2 is calculated using the formula

Where P- maximum tensile load, kgf;

S- area of ​​the initial cross-section of the sample, cm 2.

Relative elongation in % is calculated by the formula

Where h- distance between concrete tiles before testing, mm;

Sample elongation at maximum load, mm.

To determine the nature of destruction, concrete tiles are freed from grips, the bulk of the mastic is cut off with a knife moistened with water, so that a layer of mastic of no more than 3 mm remains on their surface. A stencil is applied to the place where the mastic is torn off from the surface of the concrete tile to which it was glued (Fig. 2) and the area of ​​the tear is calculated.

When the mastic is torn off from a concrete tile in an area of ​​no more than 10% of the total area of ​​the sample, the nature of the destruction is considered cohesive.

3.6. Determination of water absorption

The essence of the method is to determine the mass of water absorbed by a mastic sample when it is kept in water for a specified time.

3.6.1. To determine water absorption, heated to 70 ° Mastic (about 10 g) is applied in an even layer on a glass plate or polyethylene film measuring 50x50 mm, pre-weighed with an error of 0.001 g.

Samples with mastic are weighed with an error of 0.001 g and kept in water for 24 hours at a temperature (20 ± 2)° C. Upon removal from the water, the samples are blotted with filter paper and weighed again with the same error.

3.6.2. Water absorption W in % calculated by the formula

,

Where g 0 - mass of the sample before testing, g;

g 1 - mass of the sample after testing, g;

m- mass of mastic, g.

3.7. Determination of consistency

The consistency of the mastic is characterized by the depth of immersion of a standard cone with a total mass of 150 g into the mastic at a given temperature and for a set time.

The immersion depth of the cone is determined in accordance with the requirements of GOST 5346-78, while the vessel specified in the standard is filled with heated to 70 ° With mastic so that no air bubbles form in it, and incubate for 3 hours at a temperature (20 ± 2) ° WITH.

3.8. Determination of mastic drainage at 70° C (heat resistance)

The essence of the method is to determine the amount of mastic flow under the influence of its own weight at a given temperature and time.

3.8.1. For testing, a tray is used, the diagram of which is shown in Fig. 3.

The tray should be made of tinplate with a thickness of 1.0-1.4 mm. Before filling the tray, the mastic is preliminarily kept for about 1 hour in a thermostat at a temperature of 70 ° C. Then the tray is tightly filled with mastic so that the mastic protrudes slightly above the top and end edges of the side walls.

After holding the filled tray in a horizontal position for 3 hours at a temperature (20 ± 2) ° The protruding mastic is cut off flush with the top and end edges of the side walls of the tray.

A rod is inserted into the ears of the tray, the tray is placed in a thermostat in a vertical position with the protruding part down and kept at a temperature of 70 ° C within 24 hours.

3.8.2. After 24 hours, the tray is removed from the thermostat and placed horizontally. Along the protruding part of the tray, on which marks are marked with a division value of 1.0 mm, move a block measuring 40x40x60 mm until it comes into contact with the mastic and measure the gap in millimeters between the lower end edge of the side walls of the tray and the block.

3.9. Determination of relative elongation at a temperature of 50° WITH

3.9.1. Tests are carried out on a tensile testing machine specially equipped with a cryochamber, the requirements for which are given in clause 3.5.1, at a speed of movement of the movable clamp (1.0 ± 0.5) mm/min.

Samples are prepared for testing in accordance with the requirements given in clause 3.5.2.

The prepared samples are kept for 1 hour in a cryochamber at a temperature of minus 50 ° WITH.

The sample is tested 15 minutes after it is secured in the grips of the tensile testing machine.

When the specimen elongation reaches a value corresponding to 7% of the initial distance between the concrete tiles, the test is stopped.

Determination of the relative elongation of a sample at a temperature of minus 50 ° It was carried out by the VNIIstroypolymer Institute of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Determination of uniformity

3.10.1. The uniformity of the mastic is determined visually in the briquette section.

3.11. Determination of plasticizer migration

For testing, a brass ring with a height of 5 mm, an outer diameter of 25 mm, an inner diameter of 20 mm and filter paper in accordance with GOST 12026-76 are used.

To determine the migration of the plasticizer, a layer of filter paper is placed on a glass plate and a brass ring is placed on it. The ring is filled with the test mastic.

The prepared samples are kept in a thermostat at (100 ± 5° C) within 4 hours. After removing the samples from the thermostat, no traces of plasticizer should be found on the filter paper.

4. LABELING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. The mastic is packaged in rectangular briquettes with a cross-section of 60x30 mm and a length of up to 500 mm, which are wrapped in polyethylene film with a thickness of no more than 40 microns.

At the request of the consumer, it is allowed to pack the mastic into briquettes with a diameter of 30-50 mm and a length of no more than 150 cm. The briquettes are packaged in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, the mastic may be packaged in a different container.

The gross weight of one container must be no more than 50 kg.

4.2. The marking of the container must comply with the requirements of -77. Each container must be affixed with a label indicating:

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

shelf life of mastic;

4.3. The manufacturer must accompany each shipment of mastic with instructions for use and a document in the prescribed form, which must indicate:

name of the organization subordinate to which the manufacturer is located;

name and address of the manufacturer or its trademark;

name of mastic;

batch number and date of manufacture;

net weight of the packaged item;

results of physical and mechanical tests;

designation of this standard.

4.4. All shipping documentation for mastics of the highest quality category must have an image of the state Quality Mark, awarded in the manner established by the USSR State Standard.

4.5. Mastic can be transported by any type of transport under conditions that protect it from exposure to precipitation, sunlight and mechanical damage.

4.6. To protect the mastic from exposure to sunlight and precipitation, it should be stored indoors.

4.7. During transportation and storage, throwing containers with mastic is prohibited.

5. INSTRUCTIONS FOR USE

5.1. Sealing non-hardening mastic must be used in accordance with the instructions for its use.

5.2. Before use, the mastic must be kept at a temperature (20 ± 2) ° With at least 24 hours.

6. MANUFACTURER WARRANTY

6.1. The manufacturer must guarantee compliance of the mastic with the requirements of this standard, subject to the conditions of transportation, storage and operation.

6.2. The guaranteed shelf life of the mastic is one year from the date of manufacture.

6.3. After the warranty period has expired, the mastic must be checked for compliance with the requirements of this standard before use.