Non-hardening sealing mastic construction GOST 14791-79 Sealing non-hardening construction mastic is a viscous homogeneous mass made on the basis of polyisobutylene, ethylene propylene, isoprene and butyl rubbers, fillers and plasticizers.
MGNS sealing non-hardening construction mastic is intended for sealing closed and drained joints of external walls and for sealing the junctions of window and door blocks to wall elements and for sealing the junctions of window and door blocks to wall elements while maintaining properties in the temperature range from minus 50 to plus 70 0C, with the width of the sealed joint ranging from 10 to 30 mm and the relative deformation of the non-hardening mastic in the joint not exceeding 10%.

Directions for use
Before use, the mastic must be kept at a temperature of (20 ± 2) 0C for at least 24 hours. The temperature of the mastic before its application should be within the range (15 - 20) 0C. IN winter time The mastic must be heated to the specified temperature in special ovens.
Before sealing, clean the joint cavity from dust, debris, concrete deposits, snow, and ice. Do not apply mastic to wet surfaces.
To protect against moisture and increase adhesion to the sealing mastic, the ends of the outer panels are primed with special compounds (mastics such as KN-2, KN-3, 51-G-18).
The mastic is applied using an electric sealer.
As protective coating for non-hardening mastics at the joints of large-panel residential buildings, paint compositions should be used that form on the surface of the mastic joint protective film, preventing evaporation and migration of the plasticizer.

Transportation and storage
Mastic is transported by any type of transport under conditions that provide protection from exposure to precipitation, sunlight and mechanical damage. To protect the mastic from exposure to sunlight and precipitation, it should be stored indoors.
During transportation and storage, throwing containers with mastic is prohibited!

The guaranteed shelf life of the mastic is 12 months from the date of manufacture.
After warranty period Storage of mastic before use must be checked for compliance with the requirements of GOST 14791-79.
In cases where it is impossible to use an electrical sealant or types of work when working with non-hardening mastics, our company is pleased to offer mastic in the form of ready-made sealing cords of large diameters 20 mm, 30 mm and 40 mm. Cords can be used on sealing projects without special tools.

UDC 668.395:006.354 GOST 24064-80

Group L27

STATE STANDARD OF THE USSR UNION

Adhesive rubber mastics

Specifications

Rubber adhering mastics.

Date of introduction 1982-01-01

APPROVED AND ENTERED INTO EFFECT by Resolution State Committee USSR for Construction Affairs dated March 28, 1980 No. 41

INSTEAD GOST 5.1907-73

REISSUE. May 1988

This standard applies to adhesive rubber mastics, which are a viscous paste-like homogeneous mass and made from chloroprene rubber modified with a non-darkening antioxidant, indencoumaron resin, fillers and solvents.

Mastics are intended for gluing polyvinyl chloride and rubber roll and tile floor coverings, nitrolinoleum, parquet, as well as profile moldings and sealing gaskets.

1.1. Adhesive rubber mastics, depending on the content of chloroprene rubber and the area of application, should be produced in the following grades indicated in Table 1.

Table 1

Example symbol adhesive rubber mastic brand KN-2:

Adhesive rubber mastic KN-2 GOST 24064-80

2. Technical requirements

2.1. Adhesive rubber mastics must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

2.2. Indicators of the physical and mechanical properties of mastics must comply with the standards specified in Table 2.

table 2

	Standard for brand mastic
Name
indicator
Strength of connection between concrete base and glued material (adhesive ability), MPA (kgf/cm 2), not less than:
24 hours after gluing the samples
72 hours after gluing the samples
Viscosity on the EV-3 rotational express viscometer, Pa s (Pz)

(Revised, amended 1985)

2.3. The mastic must be a homogeneous mass. For mastic of the first quality category, more than 5, and for mastic of the highest quality category, more than 3 easily kneadable inclusions on the surface of a plate with an area of 100-110 cm are not allowed.

2.4. The viscosity of mastics can be determined using a VZ-246 type viscometer. The viscosity of mastics should not exceed 100 s.

(Revised, amended 1985, 1987)

3. Acceptance rules

3.1. Mastics must be accepted by technical control of the manufacturer in batches. The batch size is set at no more than the shift output on one production line.

3.2. To check the compliance of the mastic with the requirements of this standard, 5%, but not less than 3 container units, are selected from each batch.

3.3. Samples from container units are taken evenly over the entire height after thorough mixing of the mastic. The weight of each sample must be at least 0.5 kg. The selected samples are combined together, mixed and a total sample weighing at least 2 kg is obtained.

3.4. For each batch of mastic, adhesive ability should be determined 24 hours after gluing the samples, viscosity, content of volatile components, and homogeneity.

3.5. The adhesive ability of the mastic 72 hours after gluing the samples should be determined with each change in the recipe, but at least once a quarter.

3.6. If unsatisfactory test results of the mastic are obtained for at least one of the indicators, repeated tests must be carried out 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.

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

4. Control methods

4.1. Tests of mastic samples are carried out at a temperature after preliminary holding them at this temperature for at least 3 hours.

4.2. The number of samples to determine the adhesive ability of the mastic, the content of volatile components and uniformity must be at least three for each type of test.

4.3. The value of each mastic indicator is calculated as the arithmetic mean of the test results of at least three samples.

4.4. Determination of adhesive ability. The essence of the method is to determine the load normally applied to the gluing plane when the linoleum sample is torn off from the concrete tile.

The adhesive ability of KN-3 brand mastic is determined by the adhesive strength of the sample polyvinyl chloride linoleum according to GOST 14632-79 or polyvinyl chloride tiles according to GOST 16475-81 with concrete tiles, and the adhesive ability of KN-2 brand mastic is determined by the bonding strength of a rubber linoleum sample according to GOST 16914-71 with concrete tiles.

4.4.1. Equipment

To carry out the tests, a tensile testing machine is used, which must provide:

load measurement error -1%;

load measurement in a range excluding the first and last 10% of the scale;

constant speed of expansion of the grips equal to 100 mm/min.

The tensile testing machine must be equipped with additional grips shown in Figure 1.

4.4.2. Preparing samples for testing

To give it rigidity, a strip of linoleum measuring (50x30)1.0 mm is glued with its front surface onto a wooden plate 5-8 mm thick (board, plywood, fibreboard) of the same dimensions. Gluing is carried out at least four days before testing with glue that provides higher bonding strength than the tested mastic.

For the production of concrete tiles measuring 50x30x15 mm, grade 200 concrete is used.

The test mastic in an amount of 0.2-0.3 g is applied to a sample of linoleum and to a concrete tile in an even layer and kept in air for 6-7 minutes (until tack-free). Then the tiles with linoleum are glued crosswise to the concrete tiles and the gluing area is pressed with a load of 1.0 kg.

1 - upper grip; 2 - concrete tiles; 3 - linoleum sample; 4 - wooden tiles;

5 - lower grip

Both sides of concrete tiles can be used to glue linoleum.

The prepared sample is kept at temperature for 24 and 72 hours.

4.4.3. Carrying out the test

A concrete sample tile is inserted into the upper grip of the tensile testing machine, and a plate with linoleum is inserted into the lower grip, and the glued linoleum is torn off from the concrete tile at a grip speed of 100 mm/min.

4.5. Processing the results

The adhesive capacity of mastic in MPa () is calculated using the formula

4.6. Determination of viscosity

The viscosity of the mastic is determined 2 hours after production. The viscosity of the mastic is determined as the ratio of the shear stress on the surface of a deformer cylinder rotating in the mastic to the shear rate on its surface.

4.6.1. Equipment

Rotational portable express viscometer EV-3 with measurement errors not exceeding ±7%, complete with three deformer cylinders with a diameter of 5.15 and 45 mm.

Vessel for mastics with a diameter of 130 and a height of 120 mm.

The EV-3 viscometer is shown schematically in Figure 2.

The EV-3 rotational express viscometer consists of the following parts: device body 1; rotation speed switch of the deformer cylinder 2; spring drive with winding key 3; device start and stop buttons 4; brake 5, turned on and off simultaneously with starting and stopping the device; unit for measuring moments of resistance 6, consisting of an upper disk with a scale and a lower one with an arrow-indicator, a spiral spring between them and a mechanism for determining the number of rotations of the disks; deformer cylinder 7.

4.6.2. Preparing for the test

A deformer cylinder with a diameter of 45 mm is fixed in the resistance moment meter unit 6 (for increased viscosity, a cylinder with a diameter of 15 mm should be used). By turning switch 2, the rotation speed of the deformer cylinder is set to 40 rpm and the drive is fully started with the key.

The pointer arrow of the lower disk of the resistance moment meter assembly is set against the zero of the scale of the upper disk.

The level of the test mastic should be no more than 20 mm from the top edge of the vessel. Before measurement, the mastic is thoroughly mixed.

4.6.3. Carrying out the test

During testing, it is necessary to maintain the verticality of the axis of the deformer cylinder. The gap between the deformer cylinder, the walls and the bottom of the vessel must be at least 40 mm. The viscometer deformer cylinder is immersed in mastic 1-2 mm below its upper edge. By pressing button 4 the viscometer is turned on. When the deformer cylinder rotates, due to the viscosity of the mastic, the lower disk shifts relative to the upper one. After 4 revolutions of the deformer cylinder, sharply release button 4 to stop the device and take a reading from the scale of the upper disk of the torque meter.

4.6.4. Processing the results

According to the readings of the device, using a monogram (attached to the device), depending on the diameter of the deformer cylinder and its rotation speed, determine the viscosity in pauses with an accuracy of 1 Pz. The discrepancy between parallel measurements should not be more than 5%.

The arithmetic mean of three parallel measurements is taken as the test result.

4.7. The viscosity of mastics on a VZ-246 type viscometer, nozzle diameter 6.0 mm, is determined according to GOST 8420-74, while the mastic is diluted with a solvent in a weight ratio of 4:1 (mastic: solvent). The solvent used is a mixture of gasoline: ethyl acetate in a 1:1 ratio.

(Revised, amended 1987, 1988)

4.8. Determination of volatile components content

The essence of the method is to heat a sample of mastic at a given temperature to a constant mass.

4.9. The uniformity of the mastic is determined visually by pouring 2.5-3.5 g of it onto a glass plate measuring 9x12 cm in a layer no more than 1 mm thick and viewing it with the naked eye.

5. Packaging, labeling, transportation and storage

5.1. The finished mastic with a net weight of up to 250 kg is packaged in hermetically sealed containers. iron barrels according to GOST 13950-84, GOST 6247-79, GOST 17366-80, flasks according to GOST 5799-78, metal cans according to GOST 20882-75.

Mastic with a net weight of 1 to 10 kg is packaged in hermetically sealed metal cans in accordance with GOST 6128-81.

By agreement with the consumer, it is allowed to pack the mastic in another hermetically sealed container made of a material that does not interact chemically with the mastic.

5.2. Cans of mastic with a net weight of 1 to 10 kg must be packed in wooden boxes according to GOST 18573-86. The gross weight of the box should be no more than 50 kg.

5.3. The degree of filling of the container should be no more than 96% of the total volume of the container.

5.4. Each container must be affixed with a label indicating:

name of the organization in whose system the manufacturer is included;

name and address of the manufacturer;

name, brand of mastic;

gross and net weight;

batch number;

date of manufacture (day, month, year);

designation of this standard;

shelf life.

The label must contain large inscriptions “FLAMMABLE” and “EXPLOSIVE”, provide brief instructions for using the mastic and display the state Quality Mark assigned in the prescribed manner for the mastic.

5.5. Each box of cans must additionally indicate:

net weight of the can;

number of cans in the box.

5.6. Each batch of mastic must be accompanied by instructions for use and a quality document in the established form indicating:

name of the organization in whose system the manufacturer is included;

names and addresses of the manufacturer;

product names, brands;

batch number and date of manufacture, test results;

shelf life;

symbols of this standard.

5.7. All shipping documentation for mastics of the highest quality category must have an image of the state Quality Mark assigned in the prescribed manner.

5.8. Mastic is transported by all types of transport in covered vehicles in accordance with the current “Rules for the transportation of goods”.

Transportation of mastic at temperatures below minus 20°C for more than three days is not allowed.

5.9. The mastic should be stored at temperatures from 5 to 30°C, subject to the rules for storing flammable materials.

During storage, the mastic should be protected from direct exposure to sunlight.

6. Safety requirements

6.1. Adhesive rubber mastics are flammable and explosive.

6.2. Adhesive rubber mastics are toxic. Exceeding the maximum permissible concentrations of volatile substances irritates the mucous membranes of the respiratory tract. Systematic contact of mastic with the skin can lead to dermatitis and eczema.

Determination of harmful concentrations of styrene released by mastics is carried out in accordance with Methodical instructions for the determination of styrene in the air, approved by the USSR Ministry of Health on August 5, 1976, No. 1493-76, naphthalene - technical specifications for the method for determining naphthalene in the air, approved by the USSR Ministry of Health on May 16, 1969, No. 802-69, gasoline - Methodological instructions for definition organic matter in the air, approved by the USSR Ministry of Health on August 5, 1976, No. 1492-76 and ethyl acetate - technical specifications for the determination harmful substances in the air, approved by the USSR Ministry of Health on October 2, 1964.

6.4. In accordance with GOST 12.1.007-76, adhesive mastics belong to the third hazard class.

6.5. The fire hazard of mastics is determined by the components they contain: gasoline and ethyl acetate.

6.6. The explosion limits of the volume fraction of vapors contained in a mixture with air, the flash point in a closed crucible and the spontaneous ignition of gasoline are given in GOST 443-76.

The flash point in an open crucible, the area and temperature limits of ignition of ethyl acetate are given in GOST 8981-78.

6.7. Determination of the self-ignition temperature of vapors in air is carried out according to GOST 12.1.044-84, flash point in a closed crucible and ignition - according to GOST 12.1.021-80 and temperature limits ignition of vapors in the air - according to GOST 12.1.022-80.

6.8. If the adhesive mastic catches fire, use a fire extinguisher, asbestos sheet, talc or sand. When extinguishing, it is prohibited to use water.

6.9. When working with adhesive mastic, safe conditions for workers must be ensured in accordance with the requirements of SNiP III-A.11-70 “Safety in Construction”.

6.10. The mode of draining and filling mastics must comply with those specified in the “Rules for protection against static electricity in the chemical, petrochemical and oil refining industries” approved by the USSR State Construction Committee, the Central Committee of the Trade Union of Oil and Chemical Industry Workers and the USSR State Mining and Technical Supervision.

7. Directions for use

7.1. Adhesive rubber mastics must be used in accordance with the instructions for use, which include a safety section.

7.2. When working with mastic it is necessary to use individual means protection in accordance with standard industry standards approved by the USSR State Committee for Labor and social issues and the Presidium of the All-Union Central Council of Trade Unions dated December 30, 1959 No. 1097/P-27.

8. Manufacturer's warranty

8.1. The manufacturer guarantees that mastics comply with the requirements of this standard, subject to storage and transportation conditions.

8.2. The guaranteed shelf life of mastics is 2.5 months from the date of manufacture.

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

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.

Indicator name	Standard for mastic

Tensile strength, kgf/cm 2	0,10-0,15	0,08-0,10
Relative elongation at maximum load, %, not less
Nature of destruction	Cohesive
Water absorption, %, no more
Consistency, mm	7-11	7-11
Mastic drainage 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 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 at no more than shift output 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, relative elongation at maximum load, water absorption, consistency, plasticizer migration, runoff at 70 ° C and appearance, check 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.

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 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.

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 ° Apply mastic (about 10 g) 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 (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 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) 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 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 -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.

/ 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

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.

	Standard for mastic
Indicator name
Tensile strength, kgf/cm 2	0,10-0,15	0,08-0,10
Relative elongation at maximum load, %, not less
Nature of destruction	Cohesive
Water absorption, %, no more	0,2	0,4
Consistency, mm	7-11	7-11
Mastic drainage at 70C (heat resistance), mm, no more	1,0	2,0
Relative elongation at a temperature of minus 50C, %, not less	7,0	7,0
Plasticizer migration	Not allowed

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 at no more than shift output 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.

If the results of repeated tests are unsatisfactory, 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. 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.

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 into the mastic total mass 150 g at a given temperature and for a given 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 of dimensions 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

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 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 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.>

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

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.

	Standard for mastic
Indicator name
Tensile strength, kgf/cm 2	0,10-0,15	0,08-0,10
Relative elongation at maximum load, %, not less
Nature of destruction	Cohesive
Water absorption, %, no more	0,2	0,4
Consistency, mm	7-11	7-11
Mastic drainage at 70C (heat resistance), mm, no more	1,0	2,0
Relative elongation at a temperature of minus 50C, %, not less	7,0	7,0
Plasticizer migration	Not allowed

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 at no more than shift output 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.

If the results of repeated tests are unsatisfactory, 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. 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.

3.5. 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.

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.

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.

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.