| 预测氯离子在水泥基复合材料中有效扩散系数 |
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| 引用本文： | 孙国文,孙伟,张云升,刘志勇,王彩辉. 预测氯离子在水泥基复合材料中有效扩散系数[J]. 东南大学学报(自然科学版), 2011, 41(2): 376-381 |
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| 作者姓名： | 孙国文 孙伟 张云升 刘志勇 王彩辉 |
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| 作者单位： | 东南大学江苏省土木工程材料重点实验室,南京,211189 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目，国家高技术研究发展计划(863计划)资助项目 |
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| 摘 要： | 基于水泥基复合材料界面区水泥颗粒的分布特征,给出了界面区孔隙率分布函数和界面区的有效扩散系数;将水泥基复合材料视为骨料、基体、界面区以及其均匀化后的等效介质相四相复合球模型,采用n层球夹杂理论,逐尺度地预测了氯离子在水泥基复合材料中的有效扩散系数.结果表明:预测的氯离子扩散系数与实测结果基本吻合;n层球夹杂理论适合于预...
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| 关 键 词： | 水泥基复合材料 氯离子 扩散系数 界面过渡区 复合球模型 |
Predicting effective chloride ion diffusion coefficient in cement-based composite materials |
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| Sun Guowen Sun Wei Zhang Yunsheng Liu Zhiyong Wang Caihui. Predicting effective chloride ion diffusion coefficient in cement-based composite materials[J]. Journal of Southeast University(Natural Science Edition), 2011, 41(2): 376-381 |
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| Authors: | Sun Guowen Sun Wei Zhang Yunsheng Liu Zhiyong Wang Caihui |
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| Affiliation: | Sun Guowen Sun Wei Zhang Yunsheng Liu Zhiyong Wang Caihui (Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China) |
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| Abstract: | Based on the cement particle distribution characteristics of interfacial transition zones(ITZ) in cement-based composite materials,the porosity distribution functions and effective chloride diffusivities of ITZ are obtained.The cement-based composite materials are treated as a four-phase composite sphere model,consisting of cement continuous phase,aggregates dispersed phase,ITZ and homogenization effective medium phase.The multi-scale methods are used to predict the effective chloride diffusion coefficient ... |
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| Keywords: | cement-based composite material chloride ion diffusion coefficient interfacial transition zone composite sphere model |
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