| 一个改进的混凝土氯离子扩散计算模型 |
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| 引用本文： | 刘均利,方志.一个改进的混凝土氯离子扩散计算模型[J].重庆建筑大学学报,2012,34(Z1):99-102. |
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| 作者姓名： | 刘均利 方志 |
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| 作者单位： | 湖南大学 土木工程学院，长沙 410082；桂林理工大学 广西建筑工程检测与试验重点实验室， 广西 桂林 541004;湖南大学 土木工程学院，长沙 410082 |
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| 基金项目： | 国家973计划项目(2012CB214903);土木工程省级示范专业经费资助项目;2011年安徽省建设行业科学技术计划项目(2011YF-04);2011年中国煤炭工业协会基金项目(MTK2011-450) |
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| 摘 要： | 通过对影响混凝土中氯离子扩散的因素分析，根据Fick第二定律导出的简化模型，建立综合考虑水灰比、混凝土掺合料、龄期、温度、湿度、混凝土与氯离子结合能力及冻融损伤影响的扩散模型，通过与现有解析模型和有限差分法模型的计算结果的对比，验证模型的正确性和有效性。与现有解析模型相比，该模型考虑的因素更广泛，综合考虑温度、湿度的季节变化及冻融损伤的时随效应对氯离子扩散的影响；与数值模型相比，该模型计算效率高，便于工程应用。
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| 关 键 词： | 混凝土 氯离子 侵蚀 扩散系数 |
A Modified Chloride Ion Diffusion Model in Concrete |
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| LIU Junli and FANG Zhi.A Modified Chloride Ion Diffusion Model in Concrete[J].Journal of Chongqing Jianzhu University,2012,34(Z1):99-102. |
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| Authors: | LIU Junli and FANG Zhi |
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| Affiliation: | School of Civil Engineering, Hunan University, Changsha 410082, China;GuangXi Key Laboratory of Constructional Engineering Test, Guilin University of Technology, Guilin 541004 Guangxi, China;School of Civil Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Based on the analysis of influencing factors chloride ion diffusion in concrete and the simplified model induced by Fick''s second law, a chloride ion diffusion model was established, in which , the influences of water-cement ratio, humidity, time, temperature, chloride ion binding capacity of concrete and freeze-thaw cycle are taken into consideration. The Validity of the new model is verified through the comparison of results between the proposed model and the existing analytic /numerical model. Compared with the analytic model, the proposed model can consider the seasonal change of humidity and temperature,and the time-variant effect of freeze-thaw cycle.Compared with the numerical model, the computational efficiency of the proposed model is higher. |
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| Keywords: | concrete chloride ion erosion diffusion coefficient |
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