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...
S2− elastic adhesive mixtures
C0 – used for laying tiles with normal water absorption (at least 5% by weight) only for interior work
T – quick-hardening adhesive mixtures
C2 - used for interior and exterior work and meeting increased requirements
S1 – highly elastic mixtures
C1 – used for interior and exterior work and meeting the minimum regulated requirements
E – mixtures with increased resistance to slipping
F – mixtures with extended open time
Material on this issue is presented in the GOST R 56387 .
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.
Dry construction adhesive mixture C2 TE S1, GOST R 56387
Dry construction adhesive mixture C1 TE S2, GOST R 56387
Dry construction adhesive mixture C2 TE S2, GOST R 56387
Dry construction adhesive mixture C2 FE S2, GOST R 56387
Dry construction adhesive mixture C1 FE S2, GOST R 56387
Dry construction adhesive mixture C1 TE S1, GOST R 56387
What requirements must be met for adhesive mixtures in a dry state?
The amount of cement in the adhesive mixture must exceed 35% of the mass
The specific effective activity of natural radionuclides of adhesive mixtures should not exceed the limit values established by GOST 30108
The content of grains larger than 0.63 mm in the adhesive mixture should not exceed 0.50%
The moisture content of adhesive mixtures should not exceed 0.30% by weight
The largest grain size of the adhesive mixture should not exceed 0.63 mm.
The bulk density of the adhesive mixture should not exceed 1600 kg/m3
What requirements must be met for hardened solutions of adhesive mixtures?
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
The transverse deformation of class S1 adhesives must be at least 2.5 mm, class S2 – at least 5 mm.
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.
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.
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.
The strength of the adhesive joint after cyclic freezing and thawing must be no less than:
The strength of the adhesive joint after exposure to high temperatures must be no less than:
To mix (dilute, mix) cement adhesive mixtures of class C1, it is necessary to use...
Water latex
Vegetable oil
Synthetic oil
Primer
PVA - emulsion of polyvinyl acetate in water, with a plasticizer and special additives
Water-based latex mixture
Adhesive milk
Water
Material on this issue is presented in technical data sheets for cement adhesive mixtures.
