INFLUENCE OF STEEL CORROSION PRODUCTS IN CONCRETE ON CRACK OPENING WEIGHT LOSS OF CORROSION

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  • コンクリート中の鉄筋の腐食生成物の違いがひび割れ発生腐食量に与える影響

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 Crack width is sometimes used for evaluation of deterioration grade of concrete structures. Therefore, for crack opening weight loss of corrosion or the relationship between weight loss and crack width, many studies have been carried out. However, various results were reported, and at this point these results have not been arranged systematically with several parameters such as cover thickness, bar diameter, or concrete strength yet. It would be because influence of corrosion products have not been investigated. About 20 kinds of steel corrosion products have been found, and each products have its own density and volumetric expansion ratio. Therefore, it can be thought that difference of corrosion products will have large influence on crack opening weight loss of corrosion. Then, in this paper, at first influence of environment on corrosion products was investigated, and next influence of difference of corrosion products on crack opening weight loss of corrosion was investigated.

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