HYGROSCOPIC SWELLING TYPE WATER BLOCKING MEMBER AND WATER BLOCKING METHOD USING SAME

摘要

PURPOSE:To enhance the workability by providing such an arrangement that a water blocking member rapidly swells as necessary so as to block water and exhibits a high strength and a swelling pressure in order to support the weight of a filler. CONSTITUTION:Mold members 12 made of a hygroscopic swelling type hard material having a low swelling speed are made into close contact with a mold member 10 made of a hygroscopic swelling type soft material having a high swelling speed, on opposite sides of the mold member 10 which is therefore clamped therebetween, thereby a hygroscopic swelling type water blocking member is provided. There may be suitably used sponge-like urethane resin having a hygroscopic ability with which it can swell by several minutes, and synthetic resin having a hygroscopic ability with which it can swell several to several ten hours, in combination.