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传统的防水材料——沥青油毡,沥青和热施工方法,早已被人们熟知,一般采用二毡三油,根据建筑物档次的提高、防水层数还要增多。但是,漏水的问题,亦没有得到彻底解决。沥青在高温下易流淌、在低温下又易脆裂变硬,抗拉强度和断裂伸长率都很低,因此难以适应基层伸缩变形,采用油毡沥青的防水工程,使用年限期短、加上施工
The traditional waterproof material—asphalt linoleum, asphalt and thermal construction method has long been known. Generally, two felts and three oils are used. According to the improvement of building grades, the number of waterproof layers will increase. However, the problem of water leakage has not been completely resolved. Asphalt is easy to flow at high temperatures, brittle at low temperature and hard, low tensile strength and elongation at break, it is difficult to adapt to the deformation of the base layer, waterproofing project using asphalt felt, short service life, plus construction