Study on the Behavior of Crack and Repression Effects on Crack Stretching of Repair Material for Agricultural Concrete Canal

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  • 農業用コンクリート開水路におけるひび割れの挙動と補修材料のひび割れ拘束効果の研究
  • ノウギョウヨウ コンクリートカイスイロ ニ オケル ヒビワレ ノ キョドウ ト ホシュウ ザイリョウ ノ ヒビワレ コウソク コウカ ノ ケンキュウ

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Abstract

It is necessary to select the appropriate repairing material and method for the purpose of accomplishing the efficient maintenance and management of agricultural canal. The surface covering method is one of the general repairing methods to the concrete structures. The variation amounts of crack width of reinforced and plane concrete canal were focused in this study. Restriction effect against the movement of crack of surface covering method using alkali resistant glass fiber net was verified experimentally. As a result, variation amounts of crack width were large difference between reinforced and plane concrete canal. Especially, the crack variation amounts of plane concrete canal was more than two times larger that of reinforced concrete in daily examination. In small scale canal which have no soil behind both sides and canal axis was extended from east to west, the crack variation amounts were almost same in spite of their “position” north side and south side, at the same concrete canal. Surface covering material showed restriction effect when using alkali resistant glass fiber net. For that reason, appeared crack width to the surface covering material was repressed within harmless amounts to the function of reinforced concrete canal.

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