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Accelerated simulation of chloride ingress into concrete under drying–wetting alternation condition chloride environment
Highlights We investigate the chloride ingress into concrete under various environments. Acceleration factor is defined to represent environmental effect on chloride ingress. We propose the chloride diffusion coefficient model coupled with environment factors. Environmental conditions and concrete properties affect the acceleration factor. Numerical simulations and tests of chloride ingress are conducted.
Abstract In this study, the chloride diffusion coefficient model coupled with environmental factors is proposed to describe chloride ingress into concrete. The S curve model is also presented to fit the error function. Simultaneously, field test and artificial simulated environment experiments are conducted. Moreover, some typical RC structures are used as examples to investigate the application of the aforementioned models in forecasting service life. The results show that the chloride diffusion in concrete can be described by an equivalent chloride diffusion coefficient model proposed in this study, and the measured data of chloride content in concrete correspond with the fitted profiles. Under natural and artificial simulated environments, the differences of chloride ingress into concrete are in terms of surface chloride content, convective zone depth, and diffusion coefficient. Numerical simulation indicates that the acceleration factor can be considered as a key parameter to determine the correlation of chloride ingress into concrete under various environments.
Accelerated simulation of chloride ingress into concrete under drying–wetting alternation condition chloride environment
Highlights We investigate the chloride ingress into concrete under various environments. Acceleration factor is defined to represent environmental effect on chloride ingress. We propose the chloride diffusion coefficient model coupled with environment factors. Environmental conditions and concrete properties affect the acceleration factor. Numerical simulations and tests of chloride ingress are conducted.
Abstract In this study, the chloride diffusion coefficient model coupled with environmental factors is proposed to describe chloride ingress into concrete. The S curve model is also presented to fit the error function. Simultaneously, field test and artificial simulated environment experiments are conducted. Moreover, some typical RC structures are used as examples to investigate the application of the aforementioned models in forecasting service life. The results show that the chloride diffusion in concrete can be described by an equivalent chloride diffusion coefficient model proposed in this study, and the measured data of chloride content in concrete correspond with the fitted profiles. Under natural and artificial simulated environments, the differences of chloride ingress into concrete are in terms of surface chloride content, convective zone depth, and diffusion coefficient. Numerical simulation indicates that the acceleration factor can be considered as a key parameter to determine the correlation of chloride ingress into concrete under various environments.
Accelerated simulation of chloride ingress into concrete under drying–wetting alternation condition chloride environment
Yu, Zhiwu (author) / Chen, Ying (author) / Liu, Peng (author) / Wang, Weilun (author)
Construction and Building Materials ; 93 ; 205-213
2015-05-11
9 pages
Article (Journal)
Electronic Resource
English
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