顶棚抹灰层脱落事故分析及处理.doc

  某6层商用综合楼，混凝土框架整体式楼（屋）盖结构。结构为C25商品混凝土，用多层胶合木模板成型，脱模剂采用乳化废机油。其二、三层为洗衣、净菜业务用房，结构构件处于潮湿大气环境。为防止冷凝结露带来的危害，现浇混凝土楼板顶棚面层为厚20mm 1:3水泥砂浆抹灰，涂料二度刷白。水泥砂浆采用42.5R普通硅酸盐水泥及当地优质河砂（中砂）。抹灰层施工时间在3月中旬，而后进行楼面面层水磨石施工。事故发生时已完成二～四层水磨石地面铺贴，但尚未进行门窗框安装。
6 floors of a commercial complex building, concrete frame integral F (Uk) cap structure. Structure of C25 concrete, forming multi-layer laminated wood template, waste oil emulsion release agent. Second, three for the laundry, clean vegetable business buildings, structural elements in a humid atmosphere. To prevent dew condensation harm, concrete slab roof surface layer of thick 20mm 1:3 cement mortar plastering, paint degrees pale. 42.5R ordinary portland cement mortar with cement and the local quality of river sand (the sand). Plaster layer construction time in mid-March, and then carry out the construction terrazzo floor surface. Have been completed when the accident occurred two to four terrazzo tiling, but not for the door window frame installation.