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工程科学与技术:2010,42(3):222-227
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暴露时间和扩散深度对混凝土氯离子结合能力的影响
(1.南京航空航天大学 航空宇航学院;2.温州市建筑设计研究院)
Effect of Exposure Time and Diffusion Depth on Chloride Ion Binding Capacity of Concrete
(1.College of Aerospace Eng.,Nanjing Univ. of Aeronautics and Astronautics;2.Wenzhou Architectural Design and Research Inst.)
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投稿时间:2009-06-04    修订日期:2009-11-19
中文摘要: 进行了现场海洋大气盐雾环境中混凝土的暴露试验,分别测定了混凝土试件不同深度的总氯离子浓度和自由氯离子浓度,深入研究了混凝土在海洋大气盐雾环境下氯离子扩散过程中的自由氯离子浓度和结合氯离子浓度的经时变化特征。同时考察了各个暴露时间和扩散深度时的氯离子结合能力,运用回归分析探讨了暴露时间和扩散深度对混凝土氯离子结合能力影响的规律性。结果表明,氯离子结合能力与暴露时间符合幂函数关系,与扩散深度满足三次多项式函数关系。数值拟合计算值与实测值吻合,证明了拟合函数的有效性。
Abstract:An exposure experiment of concrete was carried out in marine atmospheric environment,the total chloride ion and free chloride ion contents of concrete were determined.The characteristics of free chloride ion and bound chloride ion contents changing along with time were investigated in the process of chloride ion diffusion.Meanwhile,chloride ion binding capacity was calculated at each different exposure time and diffusion depth, and the effect of exposure time and diffusion depth on chloride ion binding capacity of concrete were discussed by regression analysis.The results showed that the chloride ion binding capacity is the power function of exposure time and meets cubic polynomial function with diffusion depth.The fitted values agree well with the measured values and it indicate that the functions are efficient.
文章编号:200900530     中图分类号:    文献标志码:
基金项目:国家973计划资助项目(2009CB623203);国家自然科学基金资助项目(50178044);中国博士后科学基金资助项目(20060400284);江苏省博士后科研计划资助项目(0602018B)
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吴庆令,余红发,梁丽敏.暴露时间和扩散深度对混凝土氯离子结合能力的影响[J].工程科学与技术,2010,42(3):222-227.
Wu Qingling,Yu Hongfa,Liang Limin.Effect of Exposure Time and Diffusion Depth on Chloride Ion Binding Capacity of Concrete[J].Advanced Engineering Sciences,2010,42(3):222-227.