混凝土构件厂生产的预制楼板,由于种种原因,外观不可能完全一致,再加上安装楼板的误差,所以当楼板安完后,往往相邻楼板有5～10毫米的高差,有的甚至更大。因此,在做水泥砂浆地面时,一般要先做一层细石混凝土找平层,然后再做水泥砂浆面层。有的施工单位不用细石混凝土做找平层,而直接 The prefabricated floor slabs produced by the concrete component plant may not be exactly the same in appearance because of various reasons. In addition to the error in installing the floor slabs, when the floor slabs are installed, the adjacent floor slabs often have a height difference of 5 to 10 mm, and some are even more. Big. Therefore, when doing the cement mortar ground, it is generally necessary to do a layer of fine stone concrete leveling layer, and then do the cement mortar surface layer. Some construction units do not use fine-grained concrete as screed