| 摘要 |
PURPOSE:To repair a cracked concrete to a state free from recurrence of crack, by cutting the cracked part of concrete to be repaired in V-shape and filling the crack through the V-cut part with a one-pack type epoxy polymer composition having an elongation falling within a specific range after curing at room temperature. CONSTITUTION:In the repair of a cracked part of a concrete construction, the cracked part is cut in the form of V. A one-pack type epoxy polymer composition having an elongation of 20-300% after being cured at room temperature is filled into the crack through the V-cut part to complete the repair of the crack. A preferable concrete example of the one-pack type epoxy polymer composition is a composition containing an epoxy polymer (e.g. bisphenol-type epoxy polymer), a ketimine [e.g. 1,2-ethylenebis(isopentylideneimine)], a modified silicone polymer [e.g. poly(methyl dimethoxysilylethyl ether)], a catalyst (e.g. dibutyltin oxide) and a silane compound (e.g. aminopropyl-trimethoxysilane).
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