Classification and designation
The standards by which adhesives for laying ceramics and natural stone are classified, respectively:
EN 12004 SOLUTIONS AND ADHESIVES FOR CERAMIC TILES.
Requirements, conformity assessment, classification and designation; EN 12002 SOLUTIONS AND ADHESIVES FOR CERAMIC TILES. Determination of transverse deformation of cement-containing mortars.
In accordance with these standards, mortars and adhesives for ceramic tiles and slabs are divided into three types:
C ------ Cement-containing mortar;
D ------ Dispersion adhesive;
R ------ Reactive resin based adhesive;
Depending on the selected characteristics, each type is divided into different classes. The following abbreviations apply to these classes:
1 ------ Solutions or adhesives meeting the usual requirements;
2 ------ Solutions or adhesives that meet increased requirements;
F ------ Fast-hardening mortars;
T ------ Solutions or adhesives with increased slip resistance;
E ------ Solutions or adhesives with extended open time;
S1 ---- Deformable solutions or adhesives;
S2 ---- Highly deformable solutions or adhesives;
To identify a mortar or adhesive, first write the symbol for the type (C, D or R), then the abbreviation for the class or classes to which it belongs. As an example, below are the designations of solutions and adhesives for ceramic tiles and slabs:
C1TE ------ Normally hardening cementitious mortar meeting normal requirements, with increased slip resistance and extended open time;
C2FTE ----- Fast-hardening cement-containing mortar that meets increased requirements, with increased slip resistance and extended open time;
R2TE ----- Reactive resin adhesive that meets increased requirements, with increased slip resistance and extended open time;
Requirements
Cement-containing mortar:
1 ------ Adhesion strength to the base at tear-off >= 0.5 N/mm2;
2 ------ Adhesion strength to the base at tear-off >= 1.0 N/mm2;
F ------ Early pull-out bond strength >= 0.5 N/mm2 after maximum 6 h;
T ------ Slip =< 0.5 mm;
E ------ Tear-off adhesive strength >= 0.5 N/mm2 after at least 30 minutes;
S1 ---- Deflection from 2.5 to 5 mm;
S2 ---- Deflection more than 5 mm;
Reactive resin adhesive:
1 ------ Adhesion strength to the base at tear-off >= 2.0 N/mm2;
2 ------ Adhesion strength to the base at tear-off >= 2.0 N/mm2;
T ------ Slip =< 0.5 mm;
E ------ Tear-off adhesive strength >= 0.5 N/mm2 after at least 30 minutes;