Method for repairing and reinforcing existing concrete...

C - Chemistry – Metallurgy – 08 – L

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C08L 101/12 (2006.01) C08J 5/24 (2006.01) E04G 23/02 (2006.01)

Patent

CA 2333419

A method of repairing and reinforcing an existing concrete structure, such as a bridge pier and a building, comprising: pasting on the surface of such a concrete structure a reinforcing fiber sheet material of a resin content of not more than 15 wt.% while impregnating the same sheet material with a resin having a viscosity of 2.5-300 poise and curing time of 1-24 hr.; and curing the resin; the method enabling an existing concrete structure to be repaired and reinforced to have a high strength in a short period of time with ease substantially without being influenced by a temperature condition during the repairing and reinforcing work.

L'invention concerne un procédé pour réparer et renforcer une structure existante en béton telle qu'un pont, un quai ou un immeuble. Le procédé consiste à coller à la surface de la structure en béton un matériau fibreux de renforcement en forme de feuilles dont la teneur en résine est inférieure ou égale à 15 % en poids et à imprégner ledit matériau en feuilles avec une résine possédant une viscosité d'environ 2, 5-3000 poise et un temps de durcissement de 1 à 24 h; et à laisser durcir la résine. Le procédé permet de réparer une structure existante en béton et à la renforcer pour lui conférer une meilleure résistance assez rapidement et aisément sans subir d'influence notable des conditions de température lors des travaux de réparation et de renforcement.

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