The terms with their corresponding definitions are listed below. Indicate those for which the match is correct.
Open time - the maximum period of time after applying a layer of mortar mixture of a given adhesion strength to the base on the base, during which it is allowed to lay facing tiles on the applied mortar mixture.
Adhesion is the ability of a layer of mortar mixture treated with a notched trowel to wet the facing tile.
Holding time after preparation is the maximum period of time during which a freshly prepared mortar mixture (after additional mixing without adding water) retains its technological properties.
A notched trowel is a toothed tool that allows you to create a layer of mortar mixture on the base in the form of grooves of the same thickness.
Pot life is the period of time after mixing the mortar mixture necessary to achieve readiness for installation.
Sliding is the displacement under the influence of gravity of tiles or slabs laid on a layer of mortar mixture treated with a notched trowel applied to a vertical or inclined surface.
Material on this issue is set out in the GOST R 56387 .
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 the hardened state are ...
Transverse deformation
Strength of the adhesive bond (adhesion) after exposure to an aqueous environment
Open time
Wetting ability
Strength of the adhesive bond (adhesion) after exposure to an air-dry environment
Strength of adhesive bond (adhesion) after cyclic freezing and thawing
Strength of adhesive bond (adhesion) after exposure to high temperatures
Material on this issue is presented in the GOST R 56387 .
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...
S1 – highly elastic mixtures
T – quick-hardening adhesive mixtures
S2− elastic adhesive mixtures
C1 – used for interior and exterior work and meeting the minimum regulated requirements
C2 - used for interior and exterior work and meeting increased requirements
C0 – used for laying tiles with normal water absorption (at least 5% by weight) only for interior work
E – mixtures with increased resistance to slipping
F – mixtures with extended open time
What requirements must be met for hardened solutions of adhesive mixtures?
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 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:
0.5 MPa for C1; 1.0 MPa for C2.
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 strength of the adhesive joint after exposure to high temperatures must be no less than:
The strength of the adhesive joint after exposure to an aqueous environment must be no less than:
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 ready for use (freshly prepared) are ...
Resistance to slippage
Average density
Water holding capacity
Maximum Density
Humidity
Minimum Density
