The waterstop is made of polymer inorganic water-absorbing and swelling materials and rubber. It is a variety of underground construction projects, water conservancy projects, traffic tunnel projects, power plant cooling towers, municipal water supply and drainage and other concrete construction joints to prevent leakage. material.
Formwork bolt holes and construction joints of reinforced concrete outdoor walls are the main hidden parts of building leakage, and are often treated with BW waterstops. PN (BW) waterstop is a new building waterproof material with self-adhesive properties synthesized from polymer, inorganic water-absorbing swelling material, rubber and auxiliary agent. When the water absorbs water, it expands in volume and compacts the gap between the old and new concrete to form a watertight plastic colloid. The product passed the ministerial appraisal in Beijing in June 1988. It was awarded the 1991 Scientific and Technological Achievement Award and issued a certificate to become a nationally recognized qualified product. This product has created a new road to solve the leakage problem of concrete construction cracks, filling a gap in our country's waterproof. Product quality has reached the world's leading level.
PN (BW) waterstop is a newest and most ideal material for all kinds of underground building construction projects, water conservancy projects, traffic tunnel projects, power plant cooling towers, municipal water supply and drainage, etc. reinforced concrete construction joints. Solve the problem that rubber and steel waterstop belts are easy to generate undulation by friction.
Water swelling rubber surface should be clean and smooth, no scratches, bubbles and other impurities, neat edges. b. tensile strength (Mpa) ≥ 3.5c. elongation at break (%) ≥ 350 e. hardness (Shore A) (degree) 40 ± 3f. hydrostatic expansion rate% ≥ 200g.