一般建筑，尤其是住宅建筑，除卫生间、厨房等采用现浇硷楼板外，均采用预制楼板。若施工不当，就会沿板缝产生裂缝。预制钢筋硅楼板常出现有规律的顺板缝方向的通长裂缝。这种裂缝有时在工程竣工前就产生，一般是上下裂通，严重时会渗、漏水，影响使用。1产生裂缝的主要原因1. General buildings, especially residential buildings, use prefabricated floor slabs other than cast-in-place floor slabs for bathrooms and kitchens. If it is not properly constructed, it will crack along the board seams. Prefabricated reinforced-silicon sills often have regular cracks in the direction of the joints. This kind of crack sometimes occurs before the completion of the project. Generally, it cracks up and down. In severe cases, it will leak and leak, affecting the use. 1 The main reason for cracks