The most common cracks in partition walls and ceiling panels are three types of cracks in the middle, cracks in the corners, and cracks in contact with the wall. From the characteristics of the material itself, there are several reasons for cracking:
First, the material is brittle, the tensile strength, the bending strength is low, and the ultimate stress is small;
Second, the material has a high hardness and a poor impact strength. When cracked, it is easy to cause overall cracking, and there is a durability problem;
Third, the material has a high rate of swelling, and the sheet will absorb moisture and swell, which may easily cause deformation of the wall. In severe cases, the entire wall may be cracked;
Fourth, the material has a high water absorption rate, which easily causes the joint to crack and the surface decorative layer to peel off.
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