PVC waterproof coil construction quality requirements
Information sources： | Release date：
2018-12-13
| Browse volume：115
Key word：PVC waterproof coil construction quality requirements
PVC waterproofing membrane is a thermoplastic PVC coil. The PVC waterproofing membrane is made of polyester fiber fabric as a reinforcing rib, and a polymer film formed by combining a double-sided polyvinyl chloride plastic layer and an intermediate polyester reinforcing rib by a special extrusion coating process. . The combination of a highly advanced PVC plastic layer and a woven polyester fabric gives the coil excellent dimensional stability and a low coefficient of thermal expansion. PVC waterproofing membrane is widely used in waterproof, anti-seepage and anti-corrosion projects in various fields such as civil construction, subway, tunnel, water conservancy, chemical industry and metallurgy.
At the same time, the PVC waterproof membrane has good weldability, and the seam is integrated with the base metal after hot air welding; the PVC waterproof membrane has good water vapor diffusion, the condensate is easily released, and the moisture and moisture remaining in the base layer are easily discharged. PVC waterproofing membrane is resistant to aging, UV radiation, chemical corrosion and root penetration; PVC waterproofing membrane has good flexibility at low temperature (-20 °C); PVC waterproofing membrane has long service life (over 25 years, underground) More than 50 years), and no environmental pollution; the surface of PVC waterproofing membrane is reflected by ultraviolet radiation, the surface of PVC waterproofing membrane absorbs less heat and the temperature is low; the PVC waterproofing membrane has excellent flexibility and stretchability, and has high tensile strength. Excellent dimensional stability, high mechanical strength, corrosion resistance, root penetration resistance, weather resistance and UV resistance, and hail resistance.
The construction steps of PVC waterproof membrane are: base surface cleaning - → positioning elastic line - → node part strengthening treatment - → large surface coating - → paving coil - → coil lap joint - → closing treatment - → organization acceptance .
The acceptance criteria for PVC waterproofing membranes are: laying waterproofing membranes according to the rolls, the overlapping width is not less than 100mm, the joints are closely attached, firm, without mouth opening, virtual stickers, empty drums, etc.; welding width meets the requirements of the specification, no leakage welding No false welding, no burnt coke melting marks; weld inflation check pressure is not less than 2 minutes, pressure is not less than 0.15Mpa, pressure drop is not more than 20%; hand weld gun weld inspection using visual inspection and mechanical inspection (ie Use a flat-blade screwdriver for inspection).
The base layer of the waterproof layer of the coil material should be firm, the surface is clean, the yin and yang angle treatment is curved, the base layer glue is evenly coated, and there is no leak coating; the paving method of the waterproof layer of the coil material and the lap joint and the end meet the construction specifications, and the coil material The paving is neatly and evenly connected; the short side overlap of the adjacent two webs should be staggered; the additional layer of the coil is set to have a width and the position is correct; the joint is firmly bonded, the sealing is tight, and there is no damage defect.
