Modeling the synergetic effect of various factors on chloride transport in nonsaturated concrete

Abstract

Diffusion has been systematically described as the main mechanism of chloride transport in reinforced concrete (RC) structure, especially when the concrete is in a saturated state. However, the single mechanism of diffusion is not able to describe the actual chloride ingress in the nonsaturated concrete. Instead, it is dominated by the interaction of diffusion and convection. With the synergetic effects of various factors taken into account, this study aimed to modify and develop an analytical convection- diffusion coupling model for chloride transport in nonsaturated concrete. The model was verified by simulation of laboratory tests and field measurement. The results of comparison study demonstrate that the analytical model developed in this study is efficient and accurate in predicting the chloride profiles in the nonsaturated concrete.

Keywords

RC structures / nonsaturated concrete / chloride transport / synergetic effect / analytical convection-diffusion model / influence factors

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