GOST 14791 79 sealing non-hardening construction mastic. Mastic sealing non-hardening construction. Specifications. State Construction Committee of the USSR

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STATE STANDARD OF THE UNION OF THE SSR

MASTIC SEALING NON-HARDENING CONSTRUCTION

TECHNICAL CONDITIONS

USSR STATE CONSTRUCTION COMMITTEE

Moscow

STATE STANDARD OF THE UNION OF THE SSR

Decree State Committee USSR on construction affairs dated May 22, 1979 No. 71, the deadline for introduction is set

from 01.01.81

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass, manufactured 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 to wall elements while maintaining properties in the temperature range from minus 50 to plus 70 ° C, with a width of the sealed joint within 10 - 30 mm and relative deformation of non-hardening mastic in the joint is not more than 10%.

1. TECHNICAL REQUIREMENTS

1.1. Sealing, non-hardening mastic shall be manufactured in accordance with the requirements of this International Standard. technological regulations approved in the prescribed manner.

1.2. According to the physical and mechanical parameters, the mastic must comply with the standards indicated in the table.

Name of indicator	Norm for mastic
Name of indicator
Tensile strength, kgf / cm 2
Relative elongation at maximum load, %, not less than
The nature of the destruction	cohesive
Water absorption, %, no more
Consistency, mm
Drainage of mastic at 70 °C (heat resistance), mm, no more
Relative elongation at a temperature of minus 50 °С, %, not less than
Plasticizer Migration	Not allowed

1.3. In appearance, the mastic must be homogeneous, 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 the regulatory and technical documentation for these materials.

2. ACCEPTANCE RULES

2.1. Mastic is taken in batches. The batch size is set in the amount of not 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 place.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 70 °C and appearance, check for the mastic that is part of each batch.

2.4. The determination of relative elongation at minus 50 °C and the nature of the destruction of the mastic is carried out with each change in its formulation, 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, this indicator is retested with a double number of samples taken from the same batch.

In case of unsatisfactory results of repeated tests, the batch of mastic is not subject to acceptance.

If, upon acceptance of the mastic, which was duly awarded the State Quality Mark, it turns out that it does not meet at least one of the indicators provided for by this standard, then the mastic is not subject to acceptance according to 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. The mastic is kept for at least 18 hours at a temperature of (20 ± 2) °C before making test specimens.

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 their preliminary holding 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, while the deviation of each of the results from the average value should be no more than 10%.

3.5. Determination of ultimate tensile strength, elongation at maximum load and fracture pattern

3.5.1. Equipment

The tests are carried out on a tensile testing machine according to GOST 7762-74, equipped with a device for measuring elongation and special grippers, the diagram of which is shown in Fig. one.

The breaking machine must provide:

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

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

A device for measuring elongation must have a division value of the reading device of not more than 0.1 mm and a measurement error of not more than 1.0%.

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

3.5.2. Preparation of samples for testing

For the manufacture of samples of the mastic joint, tiles prepared and aged for three months from concrete grade 200 with dimensions of 50x50x25 mm are used.

It is allowed to reuse used concrete tiles, provided that a layer of concrete with a thickness of at least 1 mm is removed from their surface adjacent to the mastic.

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

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

3.5.3. Conducting a 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 rupture; at the same time, a load-strain diagram is recorded.

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

In the absence of self-recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of not more than 0.1 mm.

Tensile Strength R p in kgf / cm 2 is calculated by the formula

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

Relative elongation in% is calculated by the formula

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

Sample elongation at maximum load, mm.

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

When the mastic is separated from the concrete tile in the area of no more than 10% total area sample, the nature of the destruction is considered to be cohesive.

3.6. Determination of water absorption

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

3.6.1. To determine water absorption, mastic (about 10 g) heated to 70 ° C is applied evenly on a glass plate or polyethylene film size 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 (20±2)°C. After removing 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. Consistency definition

The mastic consistency 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 air bubbles do not form in it, and kept for 3 hours at a temperature of (20 ± 2) ° WITH.

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

The essence of the method is to determine the amount of mastic runoff under the action 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 1.0 - 1.4 mm thick tinplate. Before filling the tray, the mastic is pre-incubated for about 1 hour in a thermostat at a temperature of 70°C. Then the tray is densely filled with mastic so that the mastic protrudes slightly above the upper and end trims of the side walls.

After holding 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 upper 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 vertical position protruding part 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. On the protruding part of the tray, on which risks are applied with a division value of 1.0 mm, move a bar with dimensions of 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 bar.

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

Preparation of samples for testing is carried out 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 test of the sample is carried out 15 minutes after fixing it in the grips of the tensile testing machine.

Upon reaching the value of the elongation of the sample, corresponding to 7% of the original distance between the concrete tiles, the test is stopped.

Determination of the relative elongation of the sample at a temperature of minus 50 ° C was carried out by the institute "VNIIstroypolimer" of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Definition of homogeneity

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

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 according to GOST 12026-76 is 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 mastic to be tested.

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 a plasticizer should be detected on the filter paper.

4. MARKING, PACKAGING, TRANSPORT AND STORAGE

4.1. 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 a polyethylene film with a thickness of not more than 40 microns in accordance with GOST 10354-82.

At the request of the consumer, packing of mastic into briquettes with a diameter of 30 - 50 mm and a length of not more than 150 cm is allowed. Briquettes are packed in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, packing of mastic in other containers is allowed.

The gross weight of one container must not exceed 50 kg.

4.2. The marking of the container place must comply with the requirements of GOST 14192-77. Each container must be labeled with:

name of mastic;

batch number and date of manufacture;

net weight of packed place;

shelf life of mastic;

4.3. The manufacturer must accompany each shipped batch of mastic with instructions for use and a document of the established form, which must indicate:

the name of the organization in whose subordination 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 packed place;

results of physical and mechanical tests;

designation of this standard.

4.4. All shipping documentation for mastic of the highest quality category must have an image of the State Quality Mark assigned in accordance with the procedure established by the State Standard of the USSR.

4.5. Mastic is allowed to be transported by any means of transport in conditions that protect it from the effects of 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 applied 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 ensure that the mastic complies with the requirements of this standard, subject to the conditions of transportation, storage and operation.

6.2. Warranty period of storage of mastic - one year from the date of production.

6.3. After warranty period storage mastic before use is subject to verification of compliance with the requirements of this standard.

GOST 14791-79

UDC 691.58:006.354 Group G15

STATE STANDARD OF THE UNION OF THE SSR

SEALING MASTIC

NON-HARDENING CONSTRUCTION

Specifications

Sealing non-hardening building mastic.

Specifications

OKP 57 7541

Introduction date 1981-01-01

APPROVED AND INTRODUCED BY Decree of the State Committee of the USSR for Construction of May 22, 1979 No. 71

INSTEAD OF GOST 14791-69, GOST 5.2129-73

REPUBLICATION. August 1990

Non-hardening mastic is intended for sealing closed and drained joints of external walls and for sealing the junction of window and door blocks to wall elements while maintaining properties in the temperature range from minus 50 to 70 ° C, with a sealed joint width within 10-30 mm and relative deformation of 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 the technological regulations approved in the prescribed manner.

1.2. According to the physical and mechanical parameters, the mastic must comply with the standards indicated in the table.

	Norm for mastic
Name of indicator
Tensile strength, kgf / cm 2	0,10-0,15	0,08-0,10
Relative elongation at maximum load, %, not less than
The nature of the destruction	cohesive
Water absorption, %, no more	0,2	0,4
Consistency, mm	7-11	7-11
Drainage of mastic at 70C (heat resistance), mm, no more	1,0	2,0
Relative elongation at a temperature of minus 50C, %, not less than	7,0	7,0
Plasticizer Migration	Not allowed

1.3. In appearance, the mastic must be homogeneous, while 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 the regulatory and technical documentation for these materials.

2. Acceptance rules

2.1. Mastic is taken in batches. The batch size is set in the amount of not 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 place.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 7°C and appearance are tested for the mastic that is part of each batch.

2.4. The determination of relative elongation at minus 50C and the nature of the destruction of the mastic is carried out with each change in its formulation, 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, this indicator is retested with a double number of samples taken from the same batch.

In case of unsatisfactory results of repeated tests, the batch of mastic is not subject to acceptance.

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

3. Test methods

3.1. The mastic is kept for at least 18 hours at a temperature of (202)C before making test specimens.

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 their preliminary holding at this temperature for at least 3 hours.

3.5. Determination of ultimate tensile strength, elongation at maximum load and fracture pattern

3.5.1. Equipment

The tests are carried out on a tensile testing machine according to GOST 7762-74, equipped with a device for measuring elongation and special grippers, the diagram of which is shown in Fig. one.

Damn.1

The breaking machine must provide:

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

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

A device for measuring elongation must have a division value of the reading device of not more than 0.1 mm and a measurement error of not more than 1.0%.

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

Heck. 2

3.5.2. Preparation of samples for testing

For the manufacture of samples of the mastic joint, tiles prepared and aged for three months from concrete grade 200 with dimensions of 50X50X25 mm are used.

It is allowed to reuse used concrete tiles, provided that a layer of concrete with a thickness of at least 1 mm is removed from their surface adjacent to the mastic.

The mastic heated to 70C is applied in the form of a roller to the middle of the concrete slab and crimped on both sides with wooden restrictive slats 20 mm high and 50 mm long to dimensions in terms of 30X50 mm.

To prevent mastic from sticking to wooden planks, they should be smeared with mineral oil on the side adjacent to the mastic and sprinkled with a filler used to make mastic. From above, the mastic roller is pressed with a second concrete tile until it is rectangular in shape with dimensions of 30X50X20 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Testing

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

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

In the absence of self-recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of not more than 0.1 mm.

Tensile strength in kgf / cm 2 is calculated by the formula

S is the area of the original 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 - sample elongation at maximum load, mm.

When the mastic is separated from the concrete slab in an area of not more than 10% of the total sample area, the nature of the destruction is considered to be cohesive.

3.6. Determination of water absorption

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

3.6.1. To determine water absorption, mastic (about 10 g) heated to 70 ° C is applied in an even layer on a glass plate or polyethylene film 50x50 mm in size, previously 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. After removing 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 by the formula

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

Sample weight after testing, g;

m - mass of mastic, g.

3.7. Consistency definition

The mastic consistency 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 air bubbles do not form in it, and kept for 3 hours at a temperature of (202)C.

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

The essence of the method is to determine the amount of mastic runoff under the action 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.

Heck. 3

The tray should be made of tinplate 1.0-1.4 mm thick. 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 densely filled with mastic so that the mastic protrudes slightly above the upper and end trims of the side walls.

After holding the filled tray in horizontal position within 3 hours at a temperature of (20 2) C, the protruding mastic is cut off flush with the upper and end trims 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. On the protruding part of the tray, on which risks are applied with a division value of 1.0 mm, move a bar with dimensions of 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 bar.

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

3.9.1. The 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.

Preparation of samples for testing is carried out 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 test of the sample is carried out 15 minutes after fixing it in the grips of the tensile testing machine.

Upon reaching the value of the elongation of the sample, corresponding to 7% of the original distance between the concrete tiles, the test is stopped.

Determination of the relative elongation of the sample at a temperature of minus 50C was carried out by the institute "VNIIstroypolimer" of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Definition of homogeneity

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

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 according to GOST 12026-76 is 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 mastic to be tested.

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

4. Marking, packaging, transportation and storage

4.1. Mastic is packaged in rectangular briquettes with a section of 60x30 mm and a length of up to 500 mm, which are wrapped in a polyethylene film with a thickness of not more than 40 microns in accordance with GOST 10354-82.

At the request of the consumer, packing of mastic into briquettes with a diameter of 30-50 mm and a length of not more than 150 cm is allowed.

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

By agreement with the consumer, packing of mastic in other containers is allowed.

The gross weight of one container must not exceed 50 kg.

4.2. The marking of the container place must comply with the requirements of GOST 14192-77. Each container must be labeled with:

name of mastic;

batch number and date of manufacture;

net weight of packed place;

shelf life of mastic;

4.3. The manufacturer must accompany each shipped batch of mastic with instructions for use and a document of the established form, which must indicate:

the name of the organization in whose subordination 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 packed place;

results of physical and mechanical tests;

designation of this standard.

4.5. Mastic is allowed to be transported by any means of transport in conditions that protect it from the effects of 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 applied 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 Warranties

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

6.2. Warranty period of storage of mastic - one year from the date of production.

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

STATE STANDARD OF THE UNION OF THE SSR

MASTIC SEALING NON-HARDENING CONSTRUCTION

TECHNICAL CONDITIONS

GOST 14791-79

USSR STATE CONSTRUCTION COMMITTEE

STATE STANDARD OF THE UNION OF THE SSR

The Decree of the State Committee of the USSR for Construction of May 22, 1979 No. 71 established the deadline for the introduction

from 01.01.81

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

1.2. According to the physical and mechanical parameters, the mastic must comply with the standards indicated in the table.

Name of indicator	Norm for mastic

Tensile strength, kgf / cm 2	0,10-0,15	0,08-0,10
Relative elongation at maximum load, %, not less than
The nature of the destruction	cohesive
Water absorption, %, no more
Consistency, mm	7-11	7-11
Drainage of mastic at 70° C (heat resistance), mm, no more
Relative elongation at a temperature of minus 50° C, %, not less
Plasticizer Migration	Not allowed

1.3. In appearance, the mastic must be homogeneous, 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 the regulatory and technical documentation for these materials.

2. ACCEPTANCE RULES

2.1. Mastic is taken in batches. The batch size is set in the amount of not 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 place.

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

2.4. Determination of elongation at minus 50 ° C and the nature of the destruction of the mastic is carried out with each change in its formulation, 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, this indicator is retested with a double number of samples taken from the same batch.

In case of unsatisfactory results of repeated tests, the batch of mastic is not subject to acceptance.

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

3.5. Determination of ultimate tensile strength, elongation at maximum load and fracture pattern

3.5.1. Equipment

The tests are carried out on a tensile testing machine according to GOST 7762-74, equipped with a device for measuring elongation and special grippers, the diagram of which is shown in Fig. one.

The breaking machine must provide:

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

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

A device for measuring elongation must have a division value of the reading device of not more than 0.1 mm and a measurement error of not more than 1.0%.

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

3.5.2. Preparation of samples for testing

For the manufacture of samples of the mastic joint, tiles prepared and aged for three months from concrete grade 200 with dimensions of 50x50x25 mm are used.

It is allowed to reuse used concrete tiles, provided that a layer of concrete with a thickness of at least 1 mm is removed from their surface adjacent to the mastic.

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

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

3.5.3. Conducting a 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 rupture; at the same time, a load-strain diagram is recorded.

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

In the absence of self-recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of not more than 0.1 mm.

Tensile Strength R p in kgf / cm 2 is calculated by the formula

where P- maximum tensile load, kgf;

S- the 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.

When the mastic is separated from the concrete slab in an area of not more than 10% of the total sample area, the nature of the destruction is considered to be cohesive.

3.6. Determination of water absorption

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

3.6.1. To determine water absorption heated to 70 ° C mastic (about 10 g) is applied in an even layer on a glass plate or polyethylene film 50x50 mm in size, previously 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. After removing 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. Consistency definition

The mastic consistency 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 incubated for 3 hours at a temperature of (20 ± 2) ° WITH.

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

The essence of the method is to determine the amount of mastic runoff under the action 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.

After holding the filled tray in a horizontal position for 3 hours at a temperature of (20 ± 2) ° From the protruding mastic, cut flush with the upper and end trims 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. On the protruding part of the tray, on which risks are applied with a division value of 1.0 mm, move a bar with dimensions of 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 bar.

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

3.9.1. The 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.

Preparation of samples for testing is carried out 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 test of the sample is carried out 15 minutes after fixing it in the grips of the tensile testing machine.

Upon reaching the value of the elongation of the sample, corresponding to 7% of the original distance between the concrete tiles, the test is stopped.

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

3.10. Definition of homogeneity

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

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 according to GOST 12026-76 is 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 mastic to be tested.

The fabricated 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 detected on the filter paper.

4. MARKING, PACKAGING, TRANSPORT AND STORAGE

4.1. Mastic is packaged in rectangular briquettes with a section of 60x30 mm and a length of up to 500 mm, which are wrapped in a polyethylene film with a thickness of not more than 40 microns.

At the request of the consumer, it is allowed to pack mastic into briquettes with a diameter of 30-50 mm and a length of not more than 150 cm. Briquettes are packed in wooden or cardboard boxes, wooden barrels or winding drums.

By agreement with the consumer, packing of mastic in other containers is allowed.

The gross weight of one container must not exceed 50 kg.

4.2. The marking of the container place must comply with the requirements of -77. Each container must be labeled with:

name of mastic;

batch number and date of manufacture;

net weight of packed place;

shelf life of mastic;

4.3. The manufacturer must accompany each shipped batch of mastic with instructions for use and a document of the established form, which must indicate:

the name of the organization in whose subordination 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 packed place;

results of physical and mechanical tests;

designation of this standard.

4.5. Mastic is allowed to be transported by any means of transport in conditions that protect it from the effects of 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 applied in accordance with the instructions for its use.

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

6. MANUFACTURER WARRANTY

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

6.2. Warranty period of storage of mastic - one year from the date of production.

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

GOST 14791-79

Group G15

STATE STANDARD OF THE UNION OF THE SSR

MASTIC SEALING NON-HARDENING CONSTRUCTION

Specifications

Sealing non-hardening building mastic. Specifications

Introduction date 1981-01-01

By the Decree of the USSR State Committee for Construction Affairs of May 22, 1979 N 71, the introduction period was set from 01/01/81

IN REPLACEMENT GOST 14791-69 , GOST 5.2129-73

REPUBLICATION. August 1990

This standard applies to sealing non-hardening mastic, which is a viscous homogeneous mass, manufactured 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 to wall elements while maintaining properties in the temperature range from minus 50 to plus 70 ° C, with a width of the sealed joint within 10-30 mm and relative deformation of non-hardening mastic in the seam is not more than 10%.

1. Technical requirements

1. TECHNICAL REQUIREMENTS

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

1.2. According to the physical and mechanical parameters, the mastic must comply with the standards indicated in the table.


Name of indicator	Norm for mastic

Tensile strength, kgf/cm
Relative elongation at maximum load, %, not less than
The nature of the destruction	cohesive
Water absorption, %, no more
Consistency, mm
Drainage of mastic at 70 °C (heat resistance), mm, no more
Relative elongation at a temperature of minus 50 °С, %, not less than
Plasticizer Migration	Not allowed

1.3. In appearance, the mastic must be homogeneous, 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 the regulatory and technical documentation for these materials.

2. Acceptance rules

2.1. Mastic is taken in batches. The batch size is set in the amount of not 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 place.

2.3. Tensile strength, elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 70 °C and appearance are tested for the mastic that is part of each lot.

2.4. The determination of relative elongation at minus 50 °C and the nature of the destruction of the mastic is carried out with each change in its formulation, 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, this indicator is retested with a double number of samples taken from the same batch.

In case of unsatisfactory results of repeated tests, the batch of mastic is not subject to acceptance.

If, upon acceptance of the mastic, which was duly awarded the State Quality Mark, it turns out that it does not meet at least one of the indicators provided for by this standard, then the mastic is not subject to acceptance according to 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. The mastic is kept for at least 18 hours at a temperature of (20 ± 2) °C before making test specimens.

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 their preliminary holding at this temperature for at least 3 hours.

3.5. Determination of ultimate tensile strength, elongation at maximum load and fracture pattern

3.5.1. Equipment

Tests are carried out on a tensile testing machine GOST 7762-74*, equipped with a device for measuring elongation and special grippers, the diagram of which is shown in Fig.1.
________________
GOST 28840-90

Damn.1. Scheme of the device for measuring elongation and special grips

Damn.1

The breaking machine must provide:

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

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

A device for measuring elongation must have a division value of the reading device of not more than 0.1 mm and a measurement error of not more than 1.0%.

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

Damn.2. Stencil for determining the nature of the destruction of the sample

Damn.2

3.5.2. Preparation of samples for testing

For the manufacture of samples of the mastic joint, tiles prepared and aged for three months from concrete grade 200 with dimensions of 505025 mm are used.

It is allowed to reuse used concrete tiles, provided that a layer of concrete with a thickness of at least 1 mm is removed from their surface adjacent to the mastic.

The mastic heated to 70 °C is applied in the form of a roller to the middle of the concrete slab and crimped on both sides with wooden restrictive strips 20 mm high and 50 mm long to a size of 3050 mm in plan.

To prevent mastic from sticking to wooden planks, they should be smeared with mineral oil on the side adjacent to the mastic and sprinkled with a filler used to make mastic. From above, the mastic roller is pressed with a second concrete tile until it is rectangular in shape with dimensions of 305020 mm. Excess mastic is removed with a spatula or knife.

3.5.3. Conducting a 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 rupture; at the same time, a load-strain diagram is recorded.

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

In the absence of self-recording instruments, the elongation of the sample must be measured with a dial indicator with a division value of not more than 0.1 mm.

Tensile strength in kgf / cm is calculated by the formula

The area of the original cross section of the sample, cm.

Relative elongation in% is calculated by the formula

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

- sample elongation at maximum load, mm.

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

When the mastic is separated from the concrete slab in an area of not more than 10% of the total sample area, the nature of the destruction is considered to be cohesive.

3.6. Determination of water absorption

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

3.6.1. To determine water absorption, mastic (about 10 g) heated to 70 ° C is applied in an even layer on a glass plate or polyethylene film 5050 mm in size, previously 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. After removing from the water, the samples are blotted with filter paper and weighed again with the same error.

3.6.2. Water absorption in% is calculated by the formula

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

- mass of the sample after testing, g;

- mass of mastic, g.
________________
* The formula and its explication correspond to the original. - Database manufacturer's note.

3.7. Consistency definition

The mastic consistency 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 GOST 5346-78, while the vessel specified in the standard is filled with mastic heated to 70 ° C so that air bubbles do not form in it, and kept for 3 hours at a temperature of (20 ± 2) ° C.

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

The essence of the method is to determine the amount of mastic runoff under the action 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.

Damn.3. Test Tray Diagram

The tray should be made of tinplate 1.0-1.4 mm thick. 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 densely filled with mastic so that the mastic protrudes slightly above the upper and end trims 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 upper 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 for 24 hours.

3.8.2. After 24 hours, the tray is removed from the thermostat and placed horizontally. On the protruding part of the tray, on which risks are applied with a division value of 1.0 mm, move a bar with dimensions of 404060 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 bar.

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

3.9.1. The 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.

Preparation of samples for testing is carried out 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 test of the sample is carried out 15 minutes after fixing it in the grips of the tensile testing machine.

Upon reaching the value of the elongation of the sample, corresponding to 7% of the original distance between the concrete tiles, the test is stopped.

Determination of the relative elongation of the sample at a temperature of minus 50 ° C was carried out by the institute "VNIIstroypolimer" of the USSR Ministry of Construction Materials until January 1, 1982.

3.10. Definition of homogeneity

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

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 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 mastic to be tested.

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 a plasticizer should be detected on the filter paper.

4. Marking, packaging, transportation and storage

4.1. The mastic is packaged in rectangular briquettes with a cross section of 6030 mm and a length of up to 500 mm, which are wrapped in a polyethylene film with a thickness of not more than 40 microns along GOST 10354-82.

At the request of the consumer, packing of mastic into briquettes with a diameter of 30-50 mm and a length of not more than 150 cm is allowed.

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

By agreement with the consumer, packing of mastic in other containers is allowed.

The gross weight of one container must not exceed 50 kg.

4.2. The labeling of the container must comply with the requirements GOST 14192-77*. Each container must be labeled with:
________________
* In the territory Russian Federation the document is not valid. Active GOST 14192-96. - Database manufacturer's note.

name of mastic;

batch number and date of manufacture;

net weight of packed place;

shelf life of mastic;

4.3. The manufacturer must accompany each shipped batch of mastic with instructions for use and a document of the established form, which must indicate:

the name of the organization in whose subordination 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 packed place;

results of physical and mechanical tests;

designation of this standard.

4.5. Mastic is allowed to be transported by any means of transport in conditions that protect it from the effects of 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 applied 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's Warranties

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

6.2. Warranty period of storage of mastic - one year from the date of production.

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

Electronic text of the document
prepared by CJSC "Kodeks" and checked against:
official publication
M.: Publishing house of standards, 1990

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