Why do the tiles crack?

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Why do the tiles crack?
Generally, there are three main reasons for tile cracking: first, the quality of the tile itself, second, the problem of tile paving construction, and third, the reasons for the grass-roots level and external forces. We will introduce the specific reasons in detail below:
1. tile problem
Some bricks have high water absorption and insufficient compression resistance, resulting in cracking of tiles. The bricks did not burn through during the firing process, causing cracking during transportation, storage and use. The quality problem of the ceramic tile itself, the cracking texture is generally mesh, such as fine hair size, the cracking proportion is relatively high, and it is also possible that there are many cracks in one tile.. This situation generally occurs in relatively low-end products.
2. tiling problem
1. High-grade cement is used: ordinary No. 425 ordinary silicate cement is generally used for tile paving, and the mixing ratio of cement and sand is 1:3. If the cement grade is too high, when the cement mortar solidifies, the cement will absorb a large amount of water. At this time, the tile moisture is easily cracked if it is excessively absorbed. General performance of many tilesCracking, cracking texture direction is irregular.
2. The hollow drum of ceramic tile paving causes the ceramic tile to crack: the hollow drum and the non-hollow drum part, the expansion coefficient of cement mortar and ceramic tile are different, causing the ceramic tile to deform and crack. Generally, the distribution of cracked tiles is irregular, and the cracks are irregular. The cracks are linear and vary in length. The percussion was low and muffled.
3. No seam is left in the paving, the expansion and contraction of the ceramic tile and the base layer are inconsistent, and the ceramic tile cracks due to thermal expansion and contraction. The general performance is that the edges and corners of the ceramic tiles are cracked, the surface cracking texture is small, and the texture is relatively short.
4. Cracking of cut and processed tiles: dark cracks are formed during the cutting process. After a period of time, the tiles are cracked due to cement shrinkage and external forces.
3. grassroots and external causes
1, wall deformation, cracking because of its own geological problems will produce a certain degree of subsidence, resulting in wall deformation and cracking, but also caused the tile cracking. It is generally manifested as a coherent regular crack.
2, hit the wall, etc. caused by wall vibration and resulting in tile cracking
3. Too close to some heat sources, due to overcooling and overheating temperature changes, thermal expansion and contraction cause tiles to crack. This phenomenon generally occurs in kitchens, boiler rooms, etc.

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