Dry adhesive mixtures based on cement binder

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Question 1

Adhesive mixtures must comply with the requirements of the GOST R 56387 standard and be manufactured according to technological documentation approved by the manufacturer. The main indicators of the quality of adhesive mixtures in a dry state are ...

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Largest aggregate grain size

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Low dust generation

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Bulk density

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Humidity

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Content of grains of the largest coarseness

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Color

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Material on this issue is presented in the GOST R 56387 .

Question 2

What requirements must be met for hardened solutions of adhesive mixtures?

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The open time to achieve an adhesive joint strength of at least 0.5 MPa should be for adhesives of the following class:

C0 and F – when gluing tiles after 10 minutes;
C1 and C2 – when gluing tiles after 20 minutes;
E – when gluing tiles after 30 minutes.

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The strength of the adhesive connection to the base of fast-hardening class F adhesives after exposure in an air-dry environment for 6 hours should be no more than 0.5 MPa

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The transverse deformation of class S1 adhesives must be at least 2.5 mm, class S2 – at least 5 mm.

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The strength of the adhesive joint after cyclic freezing and thawing must be no less than:

0.5 MPa for C1;
1.0 MPa for C2.

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The strength of the adhesive joint after exposure to high temperatures must be no less than:

0.5 MPa for C1;
1.0 MPa for C2.

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The strength of the adhesive joint after exposure to an air-dry environment for 28 days must be no less than:

0.5 MPa for C0;
0.5 MPa for C1;
1.0 MPa for C2.

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The strength of the adhesive joint after exposure to an aqueous environment must be no less than:

0.5 MPa for C1;
1.0 MPa for C2.

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Material on this issue is presented in the GOST R 56387 .

Question 3

What requirements must be met for adhesive mixtures in a dry state?

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The content of grains larger than 0.63 mm in the adhesive mixture should not exceed 0.50%

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The amount of cement in the adhesive mixture must exceed 35% of the mass

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The largest grain size of the adhesive mixture should not exceed 0.63 mm.

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The specific effective activity of natural radionuclides of adhesive mixtures should not exceed the limit values ​​​​established by GOST 30108

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The bulk density of the adhesive mixture should not exceed 1600 kg/m3

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The moisture content of adhesive mixtures should not exceed 0.30% by weight

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Material on this issue is presented in the GOST R 56387 .

Question 4

An example of a symbol for an adhesive mixture based on a cement binder, intended for interior and exterior work, meeting increased requirements, with increased resistance to slipping, increased open time and high elasticity.

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Dry construction adhesive mixture C2 TE S2, GOST R 56387

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Dry construction adhesive mixture C1 TE S1, GOST R 56387

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Dry construction adhesive mixture C2 TE S1, GOST R 56387

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Dry construction adhesive mixture C1 TE S2, GOST R 56387

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Dry construction adhesive mixture C1 FE S2, GOST R 56387

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Dry construction adhesive mixture C2 FE S2, GOST R 56387

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Material on this issue is presented in the GOST R 56387 .

Question 5

The symbol of adhesive mixtures must consist of the name of the mixture in accordance with GOST 31189, class designation, values ​​of basic quality indicators (if necessary) and standard designation. Adhesive mixtures are divided into the following classes...

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E – mixtures with increased resistance to slipping

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C2 - used for interior and exterior work and meeting increased requirements

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T – quick-hardening adhesive mixtures

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S1 – highly elastic mixtures

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C1 – used for interior and exterior work and meeting the minimum regulated requirements

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C0 – used for laying tiles with normal water absorption (at least 5% by weight) only for interior work

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F – mixtures with extended open time

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S2− elastic adhesive mixtures

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Material on this issue is presented in the GOST R 56387 .

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