Method of sealing water leakage in concrete structures

Details Method of sealing water leakage in concrete structures Method of sealing water leakage in concrete structures

E - Fixed Constructions

02

D

403/32, 18/641

E02D 31/02 (2006.01) E02D 37/00 (2006.01)

Patent

CA 1277800

ABSTRACT OF THE DISCLOSURE A mixture consisting of (1) an organic polyisocyanate compound and/or a prepolymer having terminal isocyanate residues, which is derived from the reaction of an organic polyisocyanate with a polyhydroxyl compound, and (2) 2-pyrrolidone is injected as grouting into water-leaking cracks or openings in concrete structures, such as water tanks, subway constructions and tun- nels. The injected mixture diffuses into the cracks or openings and is cured in a short time by reacting with water at the leak- ing sites. The resultant polyurethane foam securely seals the water leaking sites.

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