GB/T 13477.12-2018Test method for building sealants -- Part 12: Determination of adhesion/cohesion properties at constant temperature (English PDF)

Foreword

GB/T 13477 "Test method for building sealants" consists of the following parts:

- Part 1: Specifications for test substrates;

- Part 2: Determination of density;

- Part 3: Determination of extrudability of sealants using standardized apparatus;

- Part 4: Determination of extrudability of one-component sealants;

- Part 5: Determination for tack-free time;

- Part 6: Determination of flow;

- Part 7: Determination of low-temperature flexibility;

- Part 8: Determination of tensile properties;

- Part 9: Determination of adhesion/cohesion properties after immersion in water;

- Part 10: Determination of tensile properties at maintained extension;

- Part 11: Determination of tensile properties at maintained extension after

immersion in water;

- Part 12: Determination of adhesion/cohesion properties at constant temperature;

- Part 13: Determination of adhesion/cohesion properties at variable temperatures;

- Part 14: Determination of resistance to prolonged exposure to water;

- Part 15: Determination of adhesion/cohesion properties after exposure to heat and

artificial light through glass and to water;

- Part 16: Determination of resistance to compression;

- Part 17: Determination of elastic recovery;

- Part 18: Determination of adhesion-in-peel;

- Part 19: Determination of change in mass and volume;

- Part 20: Determination of staining.

This Part is Part 12 of GB/T 13477.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

Test method for building sealants - Part 12: Determination

of adhesion/cohesion properties at constant temperature

1 Scope

This Part of GB/T 13477 specifies the terms and definitions, principle, standard test

conditions, test instruments and materials, preparation of specimens, treatment of

specimens, test procedure, and test report for the determination of adhesion/cohesion

properties after tension-compression cycles at constant temperature of sealants used in

construction and civil engineering.

This Part applies to the determination of adhesion/cohesion properties after repeated

tension-compression of plastic sealants used in construction and civil engineering.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 13477.1 Test method for building sealants - Part 1: Specifications for test

substrates (GB/T 13477.1-2002, ISO 13640:1999, MOD)

GB/T 14682 Building sealing material vocabulary (GB/T 14682-2006, ISO

6927:1981, NEQ)

3 Terms and definitions

For the purpose of this document, the terms and definitions defined in GB/T 14682

apply.

4 Principle

Bond the sealant sample between the surfaces of two parallel substrates to make a

specimen. After subjecting the specimen to tension-compression cycles, inspect the

sealant specimen for adhesion or cohesion damage.

5 Standard test conditions

The standard test conditions are: temperature of (23 +/- 2) degrees C, relative humidity of (50 +/-

5) %.

6 Test instruments and materials

7 Preparation of specimens

Before the test, the sealant sample to be tested and the test substrate shall be placed

under standard test conditions for at least 24 h.

Use degreasing gauze to remove dust from the surface of the cement mortar board. Use

solvents such as acetone to clean the aluminum plate and glass plate and dry them.

Prepare specimens according to the instructions (e.g., whether to use primer and the

mixing procedure of multi-component sealant) of the sealant manufacturer, and prepare

3 specimens of the same category of substrate.

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