Modeling of chloride diffusion in concrete immersed in CaCl2 and NaCl solutions with account of multi-phase reactions and ionic interactions

Modeling of chloride diffusion in concrete immersed in CaCl2 and NaCl solutions with account of multi-phase reactions and ionic interactions
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考虑多相反应和离子相互作用,对浸泡在 CaCl2 和 NaCl 溶液中的混凝土中氯离子扩散进行建模

DOI:
10.1016/j.conbuildmat.2014.05.026
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发表时间:
2014-09
影响因子:
7.4
通讯作者:
You, Lushen
You, Lushen
中科院分区:
工程技术1区
文献类型:
--
作者:
Chu, Hongqiang;Xiong, Chuansheng;Liu, Rong;You, Lushen

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许多研究者发现,氯化钙和氯化钠溶液中氯离子在混凝土中的扩散行为有很大的不同。传统的菲克定律不适用于描述源组成对氯离子扩散行为的影响。本文提出了一个考虑多相反应和离子相互作用的新模型。采用泊松方程的变换来描述离子通量。对多相反应进行了分析,并引入了吸附机理来描述多相反应。通过试验研究了氯离子在两种不同源溶液中在混凝土中的扩散行为。新模型的仿真结果与实验结果拟合较好,验证了新模型的有效性。
It has been found by many researchers that the diffusion behavior of chloride ions in concrete immersed in CaCl2and NaCl solutions is very different. The conventional Fick’s law is not applicable to present the influence of source composition on the chloride diffusion behavior. In this paper, a new model considering the multi-phase reactions and the ionic interactions is proposed. A transformation of the Poisson equation is adopted to describe the ionic flux. The multi-phase reactions are analyzed and the absorption mechanism is introduced in the new model to describe the multi-phase reactions. Experimental test is carried out to reveal the chloride diffusion behaviors in concrete immersed in the two different source solutions. The simulation results of the new model are fitted well with the experimental results, which confirms the validity of the new model.
DOI: 10.1007/bf02473926
发表时间: 1971
期刊: Matériaux et Construction
影响因子: --
作者:
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