建筑材料的选用

Waterproof membrane is mainly used for building walls, roof, and roads, tunnels, underground parking, etc., to achieve the protection against external rainwater, groundwater leakage can be rolled into a roll of flexible Waterproof products, waterproof membrane engineering foundation and the building between the non-leakage connection, waterproofing works in the entire project is the first barrier on the success or failure of the entire waterproofing project has an important significance. Waterproof membrane itself must have the following aspects of the basic performance:

 

   1, water resistance. Water resistance refers to the water under the action and the water remained basically unchanged after the infiltration, in the role of water under pressure with impermeability, generally multi-purpose impermeability, water absorption and other indicators to indicate.

 

   2, mechanical strength, extensibility and resistance to fracture. This refers to the waterproof membrane to withstand a certain load, stress or deformation under certain conditions do not break performance. General multi-purpose tension, tensile strength and elongation at break and other indicators to be expressed.

 

   3, the temperature stability. Temperature stability is not at high temperatures, bubble, no flow, no sliding, low temperature does not brittle crack performance, that is, under certain temperature changes to maintain the original performance capabilities. General multi-purpose heat resistance, heat resistance and other indicators to indicate.

 

   4, atmospheric stability. Atmospheric stability refers to the ability to resist erosion in the long term under combined effects of sunlight, heat, ozone and other chemical attack media. Commonly used anti-aging, heat aging and other indicators to maintain the index

 

   5, flexibility. Flexibility refers to the ability to maintain flexibility at low temperatures. Flexibility to ensure easy construction, not brittle crack is extremely important. General multi-purpose flexibility, low-temperature bending and other indicators to indicate.