粉煤灰综合利用 2014N0.2 FLY ASH COMPREHENSIVE UTILIZATION 专题研究 干湿循环和暴露对混凝土氯离子结合能力相关性研究* Correlation Research of Concrete Chloride Ion Binding between Exposure and Wet-dry Cycle 张立明1,李长成,何忠茂3 (1.吉林交通职业技术学院,吉林长春130121;2甘肃土木工程科学研究院,甘肃兰州730020) 摘要:进行了盐湖现场暴露和干湿循环环境下钢筋混凝土梁腐蚀试验,分别测定了不同试验环境下钢筋混凝土梁 在不同深度的总氯离子浓度和自由氯离子浓度,运用回归分析干湿循环和盐湖现场暴露环境下混凝土氯离子结合能力 的相关性系数K与扩散深度、混凝土抗强度的关系.结果表明:随着氯离子扩散深度和混凝土的抗压强度的增加,氯离 子结合能力相关性系数呈指数函数形式递减,研究成果可用于利用干湿循环测定的氯离子结合能力来预测实体结构 不同深度内的氯离子结合能力. 关键词:干湿循环;现场暴露;钢筋混凝土;氯离子结合能力;相关性 中图分类号:TU528.0 文献标识码:A 文章编号:1005-8249(2014)02-0008-04 Zhang Liming? Li Changcheng' He-Zhongmao2 (1.JilinCommunicationsPolytechnic Changchun 130012;2.Engineeringtechnicof Gansu Lan zhou 730020) Abstract:Concrete corrosion tests under longterm immersion and field exposure enviroment were done.The concrete samples total and free chloride ion concentration were measured at different depth under different enviroment.With use of regression method the relationship between dif- fusion depths or concrete pressive strengths and chloride bind capacity correlation under immersion and exposure.The result shows that:Chloride bind capacity correlation decreased at a exponential function type with the increase of diff...