石棉水泥瓦产生裂纹的原因主要有以下几方面: 一、原料1.石棉含砂石、粉尘多,吸附水泥的性能低,瓦硬化后结构松弛、变脆,故容易发生断裂。2.如用角闪石棉制瓦,由于角闪石棉靱性低、脆性大、不易松解,也会发生裂纹。3.用矿渣或页岩水泥制造石棉水泥瓦,含水较多,水分蒸发后易产生干缩,稍加碰击便产生裂纹。4.由于玻璃丝纖维很脆、表面光滑,如加入量过多(12%以上——占石棉百分数)、瓦 Asbestos cement tile cracks mainly due to the following aspects: First, the raw material 1. Asbestos contains sand, dust and more, the performance of the adsorption of cement is low, the tile after hardening structure is loose, brittle, it is prone to fracture. 2. If tiles are made of amphibolite, cracks may also occur because amphiboles are low malleability, brittle, and difficult to release. 3. The use of slag or shale cement to produce asbestos cement tiles, containing more water, moisture evaporation easily produce shrinkage, a little hit will produce cracks. 4. Due to the brittle and smooth surface of the glass fiber, such as excessive addition (12% - asbestos percentage), watts