| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of repairing a crack in concrete by making the crack surely clogged. SOLUTION: A mixed powder 2, which is composed of a cement powder and a bentonite powder and stored in a powder tank 3, is mixed into compressed gas and sprayed into the crack 10, which is opened on the concrete surface of a dam body 50, in a dry state by using a sandblasting gun 1 as a blasting means, and fixed to the inside of the crack 10, so that the crack 10 can be clogged and repaired. COPYRIGHT: (C)2006,JPO&NCIPI
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