Estimation of Diffusion Coefficients for Chloride Ion Penetration into Structural Concrete
Estimation of Diffusion Coefficients for Chloride Ion Penetration into Structural Concrete
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DOI：
10.14359/12322
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发表时间：
2002-09
影响因子：
1.7
通讯作者：
A. K. Suryavanshi;R. N. Swamy;G. Cardew
中科院分区：
文献类型：
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作者：
A. K. Suryavanshi;R. N. Swamy;G. Cardew
本研究的目的是找出一种简单、可靠、合理的方法来评估土木工程应用中的氯离子扩散系数。为了使研究结论与现场混凝土结构相关，用于估计扩散系数的氯离子渗透数据是使用长期循环暴露于氯离子环境中的相当大的钢筋混凝土板生成的。为了使研究更加全面，还考虑了影响混凝土微观结构的参数，如水胶比、外加矿物掺合料等。在氯化物暴露期结束后，通过实验确定了氯化物在不同深度间隔的渗透量。由此获得的氯化物渗透数据随后被用于绘制氯化物剖面，并根据几种选定的方法估计扩散系数。
The aim of this study was to identify a simple, reliable, and rational method to evaluate chloride ion diffusion coefficients for civil engineering applications. To make the conclusions of the study relevant to field concrete structures, the chloride penetration data used to estimate the diffusion coefficients was generated using fairly large-sized reinforced concrete slabs subjected to long-term cyclic exposure to a chloride environment. To make the study comprehensive, the parameters influencing the microstructure of the concrete, such as water-to-binder ratio and supplementary mineral admixture, were included. On completion of the chloride exposure regime, the amount of chlorides penetrated at different depth intervals of the slabs was experimentally determined. The chloride penetration data thus obtained was then used to plot the chloride profiles, and also for estimating the diffusion coefficients based on a few selected methods.