Putty type water expansion sealing ring is made of polymer inorganic water absorption expansion material and rubber refining, a new waterproof engineering material. Treat water expansion o-ring seal general specifications for the outer diameter of 40 mm and 45 mm, thickness of a centimeter, inner diameter processed into inner diameter according to the steel size is 8 mm, 10 mm. 12 mm, 14 mm. 16 mm. 20 mm specification. Water expansion sealing ring water after water can absorb water expansion, expansion rate of 200%, by its own expansion of the concrete and the gap of the pull bolt, can completely play the role of water stop, in the actual construction, the operation is very flexible and convenient, and save labor and time and raw material costs. It is the replacement product of welding sealing plate (ring). At present, concrete formwork pair bolt sealing ring has been applied in various projects.
The putty type water expansion sealing ring is made of water expansion rubber, it can be a round sheet, the opening of the middle position should be based on the bolt or the different on the pull ring, respectively made of a round hole or cut a long seam through both sides (. The thickness of the sealing ring is 7~20mm, and the diameter or side length is 30~80mm. The commonly used specifications are PZ type, which is a rubber ring with outer dimension D=40mm, thickness H =10mm, and middle hole diameter 2mm smaller than the diameter of the pull bolt (adjust the external dimension according to the height of the water head, ring body thickness or the of rings used on each bolt). In use, as long as the water stop ring is tightly set on the middle of the pull bolt or the pull piece, and it is finally buried in the cast-in-place concrete. When the building is used, such as a side of the pressure water bolt gap (due to the dry shrinkage of the concrete itself, inevitable) into the middle of the rubber sealing ring, sealing ring water absorption expansion, the formation of impermeable plastic colloid, blocking its surrounding seepage access, play a role in sealing.
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