| 海洋环境混凝土中氯离子浓度预测的多系数扩散方程 |
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| 引用本文： | 孟宪强,王显利,王凯英.海洋环境混凝土中氯离子浓度预测的多系数扩散方程[J].武汉大学学报(工学版),2007,40(3):57-60,92. |
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| 作者姓名： | 孟宪强 王显利 王凯英 |
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| 作者单位： | 北华大学交通建筑工程学院,吉林,吉林,132013 |
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| 摘 要： | 综合考虑了影响氯离子扩散系数的时间效应、混凝土的氯离子结合能力、温度、劣化效应、应力与开裂状态、环境条件等因素,对基于Fick第二定律的扩散方程进行修正,得到了预测混凝土中氯离子浓度分布的多系数扩散方程,给出了解析解.通过浸泡试验和暴露试验对预测模型进行验证,发现预测值与实测值吻合较好,证明了预测方程的有效性.
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| 关 键 词： | 扩散系数 混凝土 海洋环境 氯离子 |
| 文章编号： | 1671-8844（2007）03-0057-04 |
| 修稿时间： | 2006-12-20 |
A multi-coefficient diffusion equation for predicting chloride ions concentration of concrete in marine environment |
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| MENG Xianqiang,WANG Xianli,WANG Kaiying.A multi-coefficient diffusion equation for predicting chloride ions concentration of concrete in marine environment[J].Engineering Journal of Wuhan University,2007,40(3):57-60,92. |
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| Authors: | MENG Xianqiang WANG Xianli WANG Kaiying |
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| Affiliation: | College of Traffic Construction Engineering, Beihua University, Jilin 132013, China |
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| Abstract: | Based on Fick's second law of diffusion,a multicoefficient diffusion equation for predicting chloride ions concentration of concrete is deduced.The analytic solution of the equation is given.In this equation,the influences of chloride ion binding capacity of concrete,time-dependence of chloride diffusivity,temperature,deterioration of concrete,stress and crack conditions,and environmental condition are taken into consideration.The equation is verified with soak test and exposure test;and it reflects actual situation fairly well. |
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| Keywords: | diffusivity concrete marine environment chloride ion |
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