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请教垫层防水的做法步骤。还有，要用哪些材料？ - 工程施工 - 项目管理 - 氿上知道
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满意答案
卷材防水在施工时应首先做地下室底板的防水，然后把卷材沿地下室地坪连续粘贴到墙体外表面。地下室地面防水首先在基底浇筑C10混凝土垫层，厚度约为100mm。然后粘贴卷材，再在卷材上抹20 厚1:3水泥砂浆，最后浇筑钢筋混凝土底板。墙体外表面先抹20mm厚1:3水泥砂浆，冷底子油，然后粘贴卷材，卷材的粘贴应错缝，相邻卷材搭接宽度不小于100mm。卷材最上部应高出最高水位500mm左右，外侧砌半砖护墙。 4、 地下室的底板和墙体采用钢筋混凝土结构时，可采取何措施提高防水性能？ 一是骨料级配混凝土，是采用不同粒经的骨料进行级配并提高混凝土中水泥砂浆的含量，使砂浆充满于骨料之间，从而堵塞因骨料间不密实而出现的渗水通路，提高防水性能；二是外加混凝土，是在混凝土中加入加气剂或密实剂以提高抗渗性能。
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回答于：2014-02-20
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