抄録
Recently, to prevent the falling of the concrete flakes from viaducts and to keep the third person away from getting damaged by concrete flakes due to expansion of corroded steel bar, the concrete surface treatment works have been done widely. In the case that the chloride ion in concrete is less than critical value, corrosion of steel bar in concrete is governed by the progress of neutralization of concrete. In this paper, as one of the tools for the preventative maintenance works of RC-structures, the neutralization reaction model was constructed and calculated and time-dependant progressing patterns of cracking in cover concrete which caused by steel bar corrosion were analyzed. The results were compared with those of the foregone research and the efficacy of the model and problems were discussed.
