How to check Tensile adhesion strength of Tile Adhesive

Tensile adhesion strength of Tile Adhesive BS EN 12004 :   

    Test conditions :-

•        (23 ± 2) °C and (50 ± 5) % relative humidity

•       Test materials :-

•       Condition all test materials to be
tested for at least 24 h under standard conditions.

•       Type of tile: type V1: dry pressed
ceramic tile  with a water absorption ≤
0,5 % by mass, with facial dimensions of (50 ± 1) mm × (50 ± 1) mm.

•       Apparatus

•       A mass capable of exerting a force
of (20 ± 0,05) N, with a cross sectional area of less than 50 mm × 50 mm.

•       Square metallic plates, with
dimensions of (50 ± 1) mm × (50 ± 1) mm and a minimum thickness of 10 mm, with
a suitable fitting for connection to the test machine.

•       A test machine for direct pull
tensile force test and with suitable capacity and sensitivity for the test. The
machine shall be capable of applying the load to the pull-head plate at the
rate of (250 ± 50) N/s through a suitable fitting that does not exert any
bending force.

•       An air-circulating oven capable of
controlling the temperature to within ± 3 °C.

•       A notched trowel having 6 mm × 6 mm
notches at 12 mm centers.

•       Mixing of the adhesive

•       Pour the liquid into the pan.
scatter the dry powder over the liquid; mix for 30 s; take out the mixing
paddle; scrape down the paddle and pan within 1 min;  replace the paddle and mix for 1 min.

•       Procedure of testing :-

After 27 days storage under standard conditions bond the pull-head plates to
the tiles with a suitably high strength adhesive (e.g. epoxide).

•       After a further 24 h storage under
standard conditions determine the tensile adhesion strength of the adhesive by
applying a force at a constant rate of (250 + 50) N/s.

•       If fast-setting properties of
adhesives are to be tested, also determine the tensile adhesion strength 6 h
after bonding, under standard conditions (see Clause 4).