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高分子防水卷材保护层主要有水泥砂浆保护层和细石混凝土保护层两种。工程实践中 ,用水泥砂浆做保护层时 ,按１ｍ左右分格 ,表面抹平压光 ,及时养护 ,保护层就不会出现裂缝 ;而用细石混凝土做保护层时 ,如分格面积为３６ｍ２,即按６ｍ左右分格 ,保护层往往出现不规则裂缝 ,严重
Polymer waterproofing membrane protective layer are mainly cement mortar protective layer and fine stone concrete protective layer two. Engineering practice, the protective layer made of cement mortar, according to about 1m sub-grid surface smooth pressure light, timely conservation, the protective layer will not be cracked; and made of fine stone concrete protective layer, such as the sub-grid area 36m2, that is about 6m grid, the protective layer often appear irregular cracks, serious