COMPOSITION FOR WATERPROOFING END FACE OF CONCRETE STRUCTURE, METHOD FOR WATERPROOFING END FACE OF CONCRETE STRUCTURE BY USING THE COMPOSITION, AND WATERPROOF WATERTIGHT STRUCTURE OBTAINED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a composition for waterproofing the end face of a concrete structure capable of forming a waterproof watertight structure having excellent waterproof performance over a long term at a low cost, to provide a method for waterproofing the end face of a concrete structure by using the composition, and to provide a waterproof watertight structure obtained by the method.;SOLUTION: The composition for waterproofing the end face of a concrete or steel structure comprises a polyurethane-foam-forming mixture based on at least one polyol selected from the group consisting of polybutadiene polyol, polyether polyol, polyester polyol, and polycarbonate polyol and a diisocyanate and a blowing agent. The method for waterproofing the end face of a concrete or steel structure comprises applying the waterproofing composition to the end face of the structure and foaming the applied composition to cover the end face. The waterproof watertight structure is formed by injecting the waterproofing composition into the joint gap of a concrete bridge or into the joint gap between the bridge and the end of a road and foaming it in situ.;COPYRIGHT: (C)2007,JPO&INPIT