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中文摘要：
在综合考虑混凝土初始暴露龄期和时变扩散系数的基础上研究氯离子侵入混凝土的时变扩散模型，并据此推导了氯离子二维扩散微分方程的封闭解，分析了混凝土初始暴露龄期、持续暴露时间、时变扩散系数等因素对混凝土中氯离子二维扩散和分布规律的影响。研究并比较了本文与其他文献中的氯离子二维扩散模型，并对这些计算模型的特点和适用性给出说明。
英文摘要：
Based on comprehensive consideration of the initial exposure age and time-varying diffusion coefficient of concrete, a time-varying diffusion model of chloride ion ingress in concrete is studied. The closed-form solution of the two-dimensional diffusion differential equation of chloride ion is derived. The influence of initial exposure age, exposure lasting time, time-varying diffusion coefficient and other factors of the two-dimensional diffusion and distribution of chloride ions in concrete are analyzed. The model presented in this paper is compared with those in the literature. The characteristics and suitability of these models are analyzed.
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