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Underground engineering waterproof layer Why not use paper fetal waterproofing membrane?

To the base of the base paper, the low-softening point of asphalt impregnation, and then to a high softening point of asphalt coated paper on both sides of the surface, the surface of the release agent release membrane, although can play a role in water, but there are low strength, Poor, ductility and other shortcomings. The main reason is the poor quality of the base paper manufacturing roll. China's base paper is made of straw pulp or reed pulp, rags and other organic fibers made of waste, of which more than 60% of straw pulp content, so that the base paper tightness increases, not enough porosity, water absorption, oil absorption rate, Bitumen difficult to soak. Made of water after the membrane is easy to swell, rot. Due to the underground engineering waterproof layer is long-term groundwater immersion, paper tires membrane strength is low, toughness is poor, when the underground works a slight settlement difference and structural deformation, temperature deformation, shrinkage deformation, paper tire membrane will be torn Seepage, and can not be replaced. Therefore, the waterproof layer of underground engineering are not allowed to use paper fetal waterproofing membrane.
In this case,
Underground engineering waterproof layer must use the use of polymer membrane, can also choose polyester felt, glass cloth modified asphalt waterproofing membrane, recycled rubber powder without waterproofing membrane.

 
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