What requirements must be met for adhesive mixtures in a dry state?
The bulk density of the adhesive mixture should not exceed 1600 kg/m3
The moisture content of adhesive mixtures should not exceed 0.30% by weight
The content of grains larger than 0.63 mm in the adhesive mixture should not exceed 0.50%
The specific effective activity of natural radionuclides of adhesive mixtures should not exceed the limit values established by GOST 30108
The amount of cement in the adhesive mixture must exceed 35% of the mass
The largest grain size of the adhesive mixture should not exceed 0.63 mm.
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 a dry state are ...
Low dust generation
Bulk density
Color
Content of grains of the largest coarseness
Humidity
Largest aggregate grain size
The terms with their corresponding definitions are listed below. Indicate those for which the match is correct.
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.
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.
Pot life is the period of time after mixing the mortar mixture necessary to achieve readiness for installation.
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.
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.
Material on this issue is set out in the GOST R 56387 .
What requirements must be met for hardened solutions of adhesive mixtures?
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.
The strength of the adhesive joint after exposure to an aqueous environment must be no less than:
The strength of the adhesive joint after cyclic freezing and thawing must be no less than:
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 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 transverse deformation of class S1 adhesives must be at least 2.5 mm, class S2 – at least 5 mm.
What requirements must be met for adhesive mortar mixtures (ready-to-use)?
Resistance to slipping of adhesive mixtures is characterized by the value of displacement under the influence of gravity of facing tiles laid on a vertical or inclined surface. For adhesive mixtures, the offset value should be no more than 1.5 mm.
The average density of adhesive mortar mixtures is set by the manufacturer at the request of the consumer
The average density of adhesive mortar mixtures must exceed 1800 kg/m3
The water-holding capacity of ready-to-use adhesive mortar mixtures must be at least 98%
Resistance to slipping of adhesive mixtures is characterized by the value of displacement under the influence of gravity of facing tiles laid on a vertical or inclined surface. For adhesive mixtures of class T, the displacement value should be no more than 0.5 mm, for mixtures of other classes - no more than 0.7 mm.
The water-holding capacity of adhesive mortar mixtures, ready for use, must be at least 85%
