In desperation, the floor at home suddenly bulged out piece by piece. What's the matter (the weather suddenly turned cold these days and suddenly dropped 10 degrees)? The picture is below.

1. Insufficient dry foundation and water wetting make cement mortar lose water quickly, and the bonding force between brick and mortar decreases; Cement mortar or adhesive is spread or coated for too long, and the cement slurry is air-dried and has no bonding effect.

2. If the mortar is not added much, the adhesive layer will not work.

3. The grass-roots treatment is not clean, or the tiles are not soaked and wet before construction, or the eluvial soil on the back of the tiles is not removed. Dry bricks will quickly absorb the moisture in cement mortar, dehydrate the mortar and affect the setting and hardening.

4. During construction, the mortar is not full to form an empty drum, or the mortar is too thick and the operation is too heavy, so that the mortar sinks and the water floats, and the mortar cohesive force is weakened. 5. After the mortar is solidified, move the bricks to correct the deviation.

measure

1. The grass-roots level shall be handled according to regulations, and there shall be no water accumulation when the ground is watered and wet.

2. When cement mortar is used, the cement mortar is preferably hard mortar. 425# cement is adopted, and the lime-sand ratio is 1: 2 ~ 4.

3. Before tiling, soak in water to remove the surface aggradation.

4. Operate in strict accordance with the construction specifications.