Steel Bar Corrosion of RC Members Subjected to Combination Attack of Pre-existed Chloride and Concrete Carbonation
Taking into account the solo attack and combination attack of pre-existed chloride and concrete carbona tion, this paper carried out an experimental investigation on the corrosion state of steel bars embedded in concrete with different concrete cover thickness and containing different chloride amount.Comparisons of corrosion current density, corrosion area ratio and corrosion weigh loss of embedded steel bars were carried out and the effect of combination attack was systematically investigated.Test results indicated that under the combination attack, the corrosion current density measured soon after concrete carbonation test increased with concrete cover thickness; compared with the solo attack, the combination attack exhibited larger value of corrosion current density, corrosion area ratio and mass weight loss.Test results also showed that the mass loss ratio of embedded steel bars at the point of corrosion crack initiation was aboutl.29% for the specimens with 5 mm concrete cover, the corresponding value for the specimens with 10 mm concrete cover was 1.33%.
Xin Xue Yu Song Hiroshi Seki
School of Architecture and Civil Engineering, Xiamen University, Xiamen City, China Department of Civil and Environmental Engineering, Waseda University, Japan
国际会议
哈尔滨
英文
106-113
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）