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膨润土防水毯和HDPE土工膜的区别

   2024-07-24 2510

特别是HPDE膜很少用于房屋建筑工程,主要用于市政工程。高密度聚乙烯,简称“HDPE”,具有良好的耐腐蚀性、电气性能、防潮性、耐泄漏性和较高的拉伸强度,HDPE膜具有优异的耐冲击性,因此在常温或-40℃的低温下也是如此。无毒无味,熔点110℃~130℃左右,相对密度0.918~0.965。具有良好的耐热性和耐寒性。化学稳定性好,刚性和韧性高,机械强度好,耐环境应力开裂和撕裂强度好;耐酸、碱和有机溶剂。

膨润土防水毯(GCL)是一种土工合成材料。是由土工布和塑料编织布夹膨润土颗粒制成的毯状防水卷材。膨润土在水中膨胀,形成连续均匀的胶体体系。膨润土受到上下土工布的约束,从无序膨胀到有序,使其具有自密实性和防水性。GCL既有岩土工程特性,又有防水特性。

但是套管和桥墩穿越防水层细节处理不当,容易导致漏水,HPDE膜非常适合这种情况。

GCL膜和HPDE膜都适用于景观湖底部防渗,两者结合取长补短,防渗效果更好。因此,选用1.2毫米厚的HPDE膜和5.5公斤/平方米的膨润土复合防水毯(GCL)。

 
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