Cutoff method and device for cracks in concrete structures

E - Fixed Constructions – 04 – F

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E04F 21/00 (2006.01) E04G 23/02 (2006.01)

Patent

CA 1319524

CUTOFF METHOD AND DEVICE FOR CRACKS IN CONCRETE STRUCTURES ABSTRACT OF THE DISCLOSURE A cutoff method for cracks in concrete structures, which comprises attaching many connected together cutoff agent-sealing members having a predetermined open area and volume necessary for covering a crack from the outside to the surface of a concrete structure along the crack line, introducing a cutoff agent composed of a blowing resin under pressure into the cutoff agent- sealing membranes, filling the cutoff agent, introduced under pressure, in the cutoff agent-sealing members to elevate the pressure within the cutoff agent-sealing members, and by the elevated pressure causing the cutoff agent to intrude deeply into the interior of the crack, whereby an inundation and leakage of water from the crack can be prevented. According to this method, since an inundation and leakage of water from a crack in a concrete structure can be prevented by fixing the cutoff agent-sealing member and casting the cutoff agent, the operation time can be drastically shortened. Furthermore, since the cutoff agent is caused to deeply intrude not only into a main crack but also into peripheral and branched cracks, a complete cutoff effect can be attained. Moreover, even if the main crack line is bent or curved, since the cutoff agent is cast in the planar form, a cutoff effect can be easily attained.

571741

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