腐食鉄筋によるひび割れ発生前後の腐食挙動およびひび割れ進展

摘要

Accelerated corrosion tests were conducted on many specimens to improve the evaluation of corrosion levels during an accelerated corrosion test by measuring the corrosion loss several times before and after cracking. The variable factors are covering depth and accumulative current density. Test results indicated that a bi-linear interpolation having a break point at cracking improved an evaluated corrosion level during the corrosion test. Furthermore, a prediction model to evaluate a corrosion level of steel bars inside concrete from a corrosion crack width on concrete surface was proposed by considering the movements of corrosion products and the pore structures of concrete.%腐食ひび割れ発生前後の鉄筋腐食量を複数回実測することによって，腐食ひび割れ発生前後の腐食速度の相違を明らかにし，ひび割れ発生後のひび割れ進展挙動を腐食生成物の移動とコンクリートの細孔構造の観点から考察し，計測が容易なコンクリート表面の腐食ひび割れ幅から，内部鉄筋の腐食量を評価する手法を提案した。