| 复杂环境下钢筋锈蚀特征对混凝土强度影响 |
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| 引用本文： | 耿健,陈伟,孙家瑛,徐亦冬.复杂环境下钢筋锈蚀特征对混凝土强度影响[J].华中科技大学学报(自然科学版),2011(3):43-46. |
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| 作者姓名： | 耿健 陈伟 孙家瑛 徐亦冬 |
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| 作者单位： | 浙江大学宁波理工学院绿色建材与废弃物资源化研究中心; |
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| 基金项目： | 国家自然科学基金资助项目(50772084); 宁波市自然科学基金资助项目(2009A610156) |
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| 摘 要： | 采用外加直流电场和内掺氯化钠的方法模拟杂散电流和氯离子共存的腐蚀环境,研究了杂散电流与氯离子共存环境下钢筋锈蚀特征及其对混凝土强度的影响.结果表明:二者共存时对混凝土耐久性的危害远大于杂散电流单独作用;当二者共存时,钢筋锈蚀程度明显增加,钢筋由钝化状态到严重腐蚀状态时间大幅度缩短,且受腐蚀钢筋的电化学当量和腐蚀电流密度随着电流强度增大、氯离子浓度升高以及腐蚀时间延长而增大;同时,该条件下混凝土力学性能受损较为严重,其下降程度与钢筋锈蚀程度有关.
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| 关 键 词： | 钢筋锈蚀 耐久性 力学性能 混凝 杂散电流 氯离子土 |
Corrosion characteristics of rebar and its effects on concrete strength under multi-factors condition |
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| Geng Jian Chen Wei Sun Jiaying Xu Yidong.Corrosion characteristics of rebar and its effects on concrete strength under multi-factors condition[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(3):43-46. |
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| Authors: | Geng Jian Chen Wei Sun Jiaying Xu Yidong |
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| Institution: | Geng Jian Chen Wei Sun Jiaying Xu Yidong(Research Center of Green Building Materials and Waste Resources Reuse,Ningbo Institute of Technology of Zhejiang University,Ningbo 315100,Zhejiang China) |
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| Abstract: | Corrosion characteristics of rebar and its influence on concrete strength were investigated under stray current and chloride ion coexisted condition.Loading direct current electric field and inner-introduced sodium chloride were used to simulate the condition of stray current and chloride ion coexistence.The results indicate that the hazard brought by the coexistence of stray current and chloride ion to the concrete durability is much more serious than that brought by the stray current alone.When stray curr... |
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| Keywords: | rebar corrosion durability mechanical property concrete stray current chloride ion |
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