| 氯盐外侵和内掺引起的混凝土内钢筋锈蚀特征的比较研究 |
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| 引用本文： | 姬永生,张领雷,张婵,严星童,马钰.氯盐外侵和内掺引起的混凝土内钢筋锈蚀特征的比较研究[J].彭城职业大学学报,2013(3):47-52. |
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| 作者姓名： | 姬永生 张领雷 张婵 严星童 马钰 |
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| 作者单位： | [1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221008 [2]中国矿业大学徐海学院,江苏徐州221008 |
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| 基金项目： | 国家自然科学基金资助项目（51178455）;江苏省大学生科研训练项目（xhxysj1112）;江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 氯盐外侵和内掺氯盐是耐久性研究经常采用的两种加速试验方法．通过大量的构件破型发现：氯盐外侵试件中钢筋的锈蚀为靠近混凝土保护层一侧锈蚀比较严重，而背向一侧几乎没有发生；内掺氯盐试件中钢筋的锈蚀特征为钢筋四周均发生锈蚀，靠近混凝土保护层一侧的锈蚀较背向保护层的一侧严重．理论分析和试验研究结果表明混凝土内钢筋锈蚀特征取决于钢筋内外表面的活化状态及钢筋内外表面间宏观腐蚀电流Ig．
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| 关 键 词： | 氯盐外侵 内掺氯盐 钢筋锈蚀特征 腐蚀电流分布 |
Comparison Between the Corrosion Characteristics of Steel Bar in Concrete Induced by Chloride Contaminated and Mixed-into Chloride |
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| Institution: | JI Yong-sheng1 ,ZHANG Ling-lei1 ,ZHANG Chan2 ,YAN Xing-tong2 ,MA Jue2 (1. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, Xuzhou 221008, China; 2. Xuhai College, China University of Mining and Technology, Xuzhou 221008, China) |
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| Abstract: | The corrosion characteristics of steel bar in concrete is decided by the corrosion current dis-tribution along the circumference of the steel bar. The destruction of a large number of specimens indicated that the corrosion by chloride contaminated distributes on the surface of the steel bar facing the concrete cover, but the corrosion by mixed-into chloride distributes along the perimeter of the steel bar, and the corrosion level away from the concrete cover is lower than that of facing the concrete cover. The theoretical analysis and test results indicate that the corrosion characteristics of steel bar in concrete depends on active or passive state of the rehar surface facing the concrete cover and back to the concrete cover as well as mac rocell corrosion current Ig between the half surface of the steel bar facing the concrete cover and that back to the concrete cover. |
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| Keywords: | chloride contaminated mixed-into chloride i steel corrosion characteristics i corrosion cur-rent distribution |
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