氯离子含量对混凝土中钢筋锈蚀的影响  

Influence of Chloride Anion on the Corrosion of Steel Bar in Concrete

作　　者：施惠生[1,2] 郭晓潞[2] 张贺[2] 

机构地区：[1]上海同济大学先进土木工程材料教育部重点实验室,上海200092 [2]上海同济大学环境材料研究所,上海200092

出　　处：《水泥技术》2009年第5期21-25,共5页Cement Technology

摘　　要：混凝土中的钢筋锈蚀破坏是混凝土结构失稳破坏的最主要原因,而导致钢筋发生锈蚀的主要原因是氯离子的存在。本文主要研究了氯离子含量对混凝土中钢筋锈蚀的影响规律。研究表明:混凝土中氯离子含量越高,钢筋开始锈蚀的时间越早;钢筋开始锈蚀后以及进入稳定锈蚀阶段时氯离子含量越高,钢筋锈蚀速率发展的速率越快,钢筋锈蚀速率越大;混凝土一旦发生开裂后,钢筋锈蚀就进入加速锈蚀阶段。试验研究进一步讨论了氯离子加速钢筋锈蚀速率的机理和出现稳定锈蚀期的原因。The corrosion of steel bar, which is mainly due to the presence of chloride anion, is the main reason to lead the destruction of reinforced concrete structure. The influence of chloride anion content on the corrosion of steel bar in concrete was studied. The results showed that the higher chloride content, the earlier corrosion of steel bar happened. At the beginning of corrosion time and stable corrosion time, the more chloride anion content, the quicker corrosion rate and destruction rate was. Once the concrete cracked, the corrosion rate of steel bar will speed up. In addition, the mechanism of chloride anion on heavy corrosion and the reason for stable corrosion maintaining were further explored.

关 键 词：氯离子 混凝土 钢筋锈蚀 锈蚀速率 稳定锈蚀期 

分 类 号：TU528.0[建筑科学—建筑技术科学]