Rubber-made water-stopping material and water-stopping structure using the rubber-made water-stopping material

摘要

PROBLEM TO BE SOLVED: To effectively and continuously exert elastic repulsion by complementing the compressive stress of water-expandable rubber by its own expansion, and to achieve water-stop while achieving both high water pressure resistance and long-term durability. Provided is a molded water stop material made of rubber. SOLUTION: A molded water stopping material 1 made of rubber according to the present invention is shaped like a band, and is formed by integrating a high expansion portion 1A and a low expansion portion 1B respectively formed of two types of water expansion rubbers having different expansion coefficients. While forming the high expansion portion 1A on the low expansion portion 1B by laminating at least one of the left side portion 3 and the right side portion 4 in the cross-sectional shape in the direction orthogonal to the axis, the remaining portion is formed by the low expansion portion 1B. By having the formed configuration, the high expansion portion 1A and the low expansion portion 1B can work together to complement compressive stress, and the low expansion portion 1B suppresses overexpansion of the high expansion portion 1A. It can be done 【Selection figure】 Figure 1