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.
Pot life is the period of time after mixing the mortar mixture necessary to achieve readiness for installation.
Adhesion is the ability of a layer of mortar mixture treated with a notched trowel to wet the facing tile.
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.
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.
Material on this issue is set out 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...
C1 – used for interior and exterior work and meeting the minimum regulated requirements
C0 – used for laying tiles with normal water absorption (at least 5% by weight) only for interior work
C2 - used for interior and exterior work and meeting increased requirements
F – mixtures with extended open time
T – quick-hardening adhesive mixtures
S2− elastic adhesive mixtures
E – mixtures with increased resistance to slipping
S1 – highly elastic mixtures
Material on this issue is presented 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 ...
Strength of the adhesive bond (adhesion) after exposure to an aqueous environment
Transverse deformation
Strength of adhesive bond (adhesion) after cyclic freezing and thawing
Strength of adhesive bond (adhesion) after exposure to high temperatures
Open time
Strength of the adhesive bond (adhesion) after exposure to an air-dry environment
Wetting ability
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 ...
Humidity
Color
Bulk density
Low dust generation
Content of grains of the largest coarseness
Largest aggregate grain size
What requirements must be met for adhesive mixtures in a dry state?
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 specific effective activity of natural radionuclides of adhesive mixtures should not exceed the limit values established by GOST 30108
The bulk density of the adhesive mixture should not exceed 1600 kg/m3
The largest grain size of the adhesive mixture should not exceed 0.63 mm.
The amount of cement in the adhesive mixture must exceed 35% of the mass
