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自粘胶膜防水卷材在地下室底板采用预铺反粘法有哪些技术要点?

   2024-09-25 2040

地下室底板采用自粘胶膜防水卷材预铺反粘法施工的做法是:在大面自粘卷材铺贴完毕后,可直接在自粘胶膜防水卷材面上绑扎钢筋(为避免扎破卷材防水层,可以在自粘卷材面上垫一些砖块再绑扎钢筋),然后进行浇筑结构自防水砼底板。这种方法有以下技术要点:

1.铺贴自粘胶膜防水卷材。采用空铺法,将待铺卷材剪好,立即展开铺于预定部位,沿着基准线向前粘贴,随后用压辊向两侧、向前滚压排气粘牢。

2.自粘胶膜防水卷材接缝粘贴。待自粘胶膜防水卷材表面清除干净,掀去搭接卷材边层粘结隔离纸,(如遇气温低时,应用加热器加热)立即粘合排气辊压粘牢,卷材搭接宽度为70mm。

3.自粘胶膜防水卷材收头处理。立面收头处理:自下而上将卷材粘贴于立面基层,辊压排气。端头、阴阳角处理:端头、阴阳角局部部位采用钉压处理。

4.检查验收。检查所有自粘胶膜防水卷材面有无撕裂、刺穿,发觉后应及时修补。


 
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