What causes the tiles to fall off

1. The water absorption rate of normal tiles will not be less than 10%, if the water absorption rate is too low, it will lead to insufficient water absorption, and the cement mortar can not be well bonded, resulting in the problem of falling off, but too much will absorb water and expand, and crack the situation.

2. The mortar on the back of the tile is not cleaned, and this layer of mortar will make the bonding of the cement mortar and the tile more difficult, resulting in the problem of falling off.

3. The quality of cement mortar is not up to standard, which will lead to rapid heat dissipation and rapid evaporation of water, resulting in cracks and affecting the adhesion.

4. The soaking water before construction is not enough, which will allow the cement mortar after paving to continue to absorb water, resulting in hollowing and falling off.

5. The cement mortar is unevenly applied and not fully pasted, which will lead to the appearance of hollow drums, resulting in the problem of falling off.

Abstract] Through the analysis of the causes of wall tile sticking and falling off, appropriate maintenance plans are adopted to solve the problem of tile falling off and throwing bricks to avoid similar problems in subsequent construction.

1.Project Overview.

Tiantai Qingchengyuan project is located in the area at the junction of Jiangjun Avenue and Focheng West Road, Jiangning Development Zone, Nanjing. The total construction area is invested and built by Jiangsu Tiantai Construction and designed by Nanjing Zhongyi Architectural Design. The commencement date is August 25, 2008 and the completion date is September 26, 2012.

According to the requirements of the construction unit, the wall finish is changed to 12mm thick tiles, and the size of the tile finish is constructed according to the requirements of the construction unit, and the actual construction, the specific decoration plan is declared by the construction team, and the construction is approved by the supervision and construction unit.

At the beginning of 2011, some wall tiles in Building 1 fell off, especially in the lobby, and some tiles in the front room of the floor were falling off, while no tiles were found in Building 2. According to the requirements of the property and Party A, the falling tiles are repaired and pasted with construction glue cement mortar. By the beginning of 2012, there were more wall tiles falling off in the winter stage, and from the perspective of tile falling off, the adhesive layer and the finishing layer on the back of the tile were peeling off.

There are radial cracks on the surface of some bonded mortars, and the cracks are mainly located in the center of the plate bonded mortar.

2.Cause analysis.

The construction stage of wall tiles is July to August, when the temperature is high, and winter.

The reason for this is mainly caused by some misconduct in the three periods before, during and after the paving. Improper handling of the tiles before paving is the cause. The tile needs to be soaked for a period of time before paving, so that the tile does not absorb the moisture of the mortar on the surface, and the adhesion is better.

If it is not soaked, it may fall off due to insufficient adhesion. For the process of soaking water, in fact, it should not be too much, because if there is a lot of water on the surface of the tile, the gap between the mortar and the tile itself will be hollowed due to the evaporation of water during the pasting.

This step of base plastering must be done well, because if it is not cleaned, the moisture will be absorbed by the sediments such as dust and dust of the base layer during paving, and the bonding quality will be affected, which will lead to hollowing or falling off. Firm adhesion is also very important, if the home is using a large piece of tile, this kind of tile due to the large area is mostly with a rubber hammer to hit the leveling is difficult to remove all the air of the tile adhesive bonding layer, so that it is easy to form a hollow drum, the bond is not firm.

There is also the last problem of grouting, because most of the white cement caulking is used, but because the stability of this substance is not good, and the continuous quality is short, so if you can, try some other material caulking, so that you can minimize the occurrence of subsequent falling off caused by the cracking of the tile gap.

The main reason for the hollowing of tiles falling off: the drum.

1. The base treatment of the wall and ground is not clean, or the watering is not moist enough; Mul.

2. The cushion cement mortar is too thick or adds more water; Mul.

3. The floating dust on the back of the tile is not removed or infiltrated with water is not enough, and the stain on the back of the tile is not cleaned up when paving, and there are too many water traces, resulting in unsolid bonding; Mul.

4. The water absorption rate of the national standard for porcelain bricks is E 0 5, and the national standard for ceramic bricks is 10, so the adhesive force is far weaker than that of ceramic bricks, the shrinkage and expansion rate of porcelain bricks is about 4 10 6, and the shrinkage rate of concrete is more than twice that of porcelain bricks.

Chuangrui assistant.

There are several main reasons for tile hollowing to fall off and crack.

1. The base treatment of the wall and ground is not clean, or the watering is not moist enough;

2. The cushion cement mortar is too thick or adds more water;

3. The floating dust on the back of the tile is not removed or infiltrated with water is not enough, and the stain on the back of the tile is not cleaned up when paving, and there are too many water traces, resulting in unsolid bonding;

4. The water absorption rate of the national standard for porcelain bricks is E 0 5, and the national standard for ceramic bricks is 10, so the adhesive force is far weaker than that of ceramic bricks, the shrinkage and expansion rate of porcelain bricks is about 4 10 6, and the shrinkage rate of concrete is more than twice that of porcelain bricks.

5. The water absorption rate of porcelain bricks is low, such as when it is not completely pasted with cement, it is subjected to large impact force (such as heavy object impact, trampling, etc.), which causes the separation of two different objects of brick and cement, and the hollowing of the bottom of the brick;

6. Due to the inconsistent density of the mortar, the mortar will settle after the completion of the initial setting period, resulting in hollowing and loosening;

7. The cement does not meet the requirements, etc.;

8. Different from the thermal expansion coefficient of cement, there is a temperature difference stress after the paving of large-size tiles, and the seasonal temperature difference oscillation will cause the bonding strength to decrease;

9. The back pattern of the product itself is unreasonable or there is a lot of brick base powder attached to it, and no corresponding measures are taken in the construction.

10. Between the tiles, especially the large-scale bricks, the joints are too small, and the thermal expansion and cold contraction of the tiles squeeze each other to cause warping and cracking.