AS 14448:2020 pdf download.Low modulus adhesives for exterior tile finishing (ISO 14448:2016, MOD).
7 Test methods
7.1 Shelf life
Store the adhesive for four weeks in the original unopened package at (L ± ZJ C and (5(1 ± 10J % Kf-l for the first two weeks and at (50 ± 2) °C and (85 ± 5) % RH for the next two weeks. After the storage period, place approximately 100 g adhesive on the glass plate with dimensions 100 mm x 100 mm x 5 mm and immediately spread the adhesive to about 1 mm layer using a suitable paddle. Inspect the layer for any gel and foreign matters. This test is applicable only to the I component adhesives.
7.2 Mixing homogeneity inspection
Take base resin and hardener in an approximate volume to gain 200 g to 300 g blend and in the ratio that the manufacturer specifies. Place it on the glass plate with dimensions 300 mm x 300 mm x 5 mm and immediately mix well for about 3 mm. After mixing, confirm homogeneity by a visual check. This test is applicable only to the 2 component adhesives.
7.3 Adhesive strength
7.3.1 Materials for the testing
7.3.1.1 Substrate
The substrate is the cement mortar substrate defined in 6.2.2 with dimensions of approximately 70 mm x 70 mm x 20 mm. The surface should be free of dust, dirt, etc.
7.3.1.2 Ceramic tiles
The ceramic tiles are the ones defined in 62.3 with dimensions of approximately 45mm x 45 mm x 7 mm.
7.3.2 Preparation of test pieces
7.3.2.1 Spreading of adhesive
Insert five substrate with their polished surfaces up, into the steel frame of Figure 3 and fix them without leaving gaps. Adhere a flexible masking tape on the steel frame as shown in Figure 4. so that it goes 7 mm over the substrate edges. Apply a sufficient volume of adhesive to the substrate and spread it to a layer of approximately 5 mm. Comb the adhesive layer with a common comb trowel, holding the comb at an angle of approximately 600, so that the adhesive is evenly spread. Remove the masking tape slowly.AS 14448 pdf download.