| 摘要: |
| 研究了碳化作用下内掺氯盐混凝土钢筋的腐蚀面积率和腐蚀等级，并与单一因素作用相比较，阐明了碳化和氯盐复合作用下的钢筋混凝土腐蚀特征.结果表明：碳化和氯盐复合作用下的混凝土钢筋腐蚀面积率和腐蚀等级均大于单一因素作用下的腐蚀面积率和腐蚀等级；随着n(NO-2)/n(Cl-)的增加，碳化与氯盐复合作用下的钢筋腐蚀面积率和腐蚀等级逐渐降低，当n(NO-2)/n(Cl-)为12时，钢筋腐蚀面积率由620%下降到18%. |
| 关键词: 钢筋混凝土 碳化 氯盐 复合作用 钢筋腐蚀 |
| DOI：103969/jissn1007 9629201502016 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51278255,51478227)；宁波市重大科技计划项目(2013C51006) |
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| Effect of Carbonation on Characteristics of Steel Corrosion for Reinforced Concrete Contained Chloride |
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LIU Junzhe, SUN Wu, HE Zhimin, BA Mingfang, CHEN Jianbin, YUAN Weijing
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Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China
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| Abstract: |
| Corrosion behaviour of rebars in concrete subjected to chloride ions and carbon dioxide rich atmospheres was investigated. In order to evaluate the corrosion characteristic, the corrosion behaviour of rebars in concrete in the presence of simultaneous contamination by chlorides and carbon dioxide were contrasted with that of the concrete contaminated with a single factor. Results indicate that compared with the concrete contaminated with single factor, the rebar corroded area and corrosion grade are higher in concrete exposed simultaneously to carbon dioxide and chlorides. However, with the increase of mole ratio of n(NO-2)/n(Cl-), the rebar corroded area and corrosion grade in concrete gradually decrease, and the rebar corroded area has dropped from 620% to 18% preserved in the experimental condition when n(NO-2)/n(Cl-) is 12. |
| Key words: reinforced concrete carbonation chloride salt simultaneous action steel corrosion |
