Modeling the Synergetic Effect of Various Factors on Chloride Transport in Nonsaturated Concrete

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 31; no. 6; pp. 1336 - 1346
• Main Authors: Zhang, Xiaogang, Lu, Zhaohui, Wang, Shuping, Zhou, Tianhai, Xing, Feng
• Format: Journal Article
• Language: English
• Published: Wuhan Wuhan University of Technology 01.12.2016; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Chlorides; Concretes; Coupling; Diffusion; Materials Science; Mathematical analysis; Mathematical models; Metallic Materials; Reinforced concrete; Transport; 实验室模拟; 氯离子侵蚀; 相互作用; 耦合模型; 输运扩散; 钢筋混凝土; 非饱和; 饱和状态; influence factors; RC structures; nonsaturated concrete; chloride transport; analytical convection-diffusion model; synergetic effect
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-016-1536-z

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.