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

1986-11-06

1988-05-17

Murtagh, John E.

Static structures (e.g., buildings)

Machine or implement

521697, 5216914, 523094, 405264, E02D 3102, E02D 3700

Patent

active

047441933

ABSTRACT:
A mixture consisting essentially 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 for grouting into water-leaking cracks or openings of concrete structures such as water tanks, subway constructions and tunnels. The injected mixture diffuses into the cracks or openings and is cured in short time by reacting with water at the leaking sites. The resultant polyurethane foam securely seals the water leaking sites.

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