pvc waterproofing membrane can be waterproof, and it is widely used, and can be applied to all kinds of roof waterproofing in industry and construction, basement, reservoir, dam, highway tunnel, railway tunnel, bomb shelter, grain depot, garbage factory, wastewater treatment and other building waterproofing projects. The waterproof reason of pvc waterproofing membrane is mainly due to its material characteristics and production mode. PVC waterproofing membrane is a thermoplastic PVC membrane, which is a polymer membrane formed by combining the double-sided PVC plastic layer and the middle polyester reinforcing rib with polyester fiber fabric as the reinforcing rib through a special extrusion coating process. The combination of PVC plastic layer with advanced formula and polyester fiber fabric with network structure makes the coil have excellent dimensional stability and low thermal expansion coefficient. Not only can it be waterproof, but also it can improve the performance of the coil directly exposed to the natural environment.
second, what kind of glue is used for laying pvc waterproofing membrane
The glue used for laying pvc waterproofing membrane is an adhesive with natural rubber, resin ester and solvent as the main raw materials. When laying in a large area, high-strength special pvc adhesive can be used, and the lap piece can be welded by hot air welder.
3. Construction method of pvc waterproofing membrane
1. Full adhesion method
(1) Before waterproofing membrane construction, the membrane should be laid on the surface of the base without bonding first. Pay attention to the fact that the membrane should be laid straight and flat, and the material should not be distorted. The longitudinal lap width of pvc waterproofing membrane is 5mm, which needs to be cut properly, and its transverse direction is usually butt-jointed, and 2-25mm is used above it.
(2) Fold the long sides of multiple sheets of waterproof coiled materials in half, and apply adhesive to the folds of the base and coiled materials surfaces respectively. When the adhesive is dry enough to not stick to hands, fold and stick the pre-laid waterproof coiled materials surfaces, and compact them with a press roller.
(3) Fold the parts that are not folded, continue to stick and compact with the above methods, and then weld the joints.
2. Empty paving method
(1) First, it is laid according to the paving method of full adhesion method, and then the whole waterproof project is fully adhered with coiled material, and the lap joint is welded.
(2) butt joint treatment is adopted in the transverse direction, and 2-25mm wide coiled material is used to cover the lap joint and weld.
3. Mechanical fixation method
(1) The first step of mechanical fixation method is the same as that of full-adhesion method. You can refer to the first step of full-adhesion method, and then the longitudinal lap width is 1mm, of which 5mm is used as a fastener. The fastener should pass through the insulation layer and then be fixed on the structural layer.
(2) firstly, punch holes with impact drill according to the designed spacing, the aperture should not be too large, and it should be smaller than the fixed outer diameter. After the fixing parts are in place, screw them with a screwdriver, and after the fixing parts are fixed, weld each lap joint. Also, use transverse butt joint treatment, and cover the lap joints with 2-25mm wide waterproof coiled material for welding.