American Society of Civil Engineers


Numerical Model for Chloride Penetration into Saturated Concrete


by Qiang Yuan, (Lecturer, School of Civil Engineering and Architecture, Central South Univ., Hunan, China; and Dept. of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent, Belgium.), Caijun Shi, (Professor, College of Civil Engineering, Hunan Univ., Hunan, China.), Geert De Schutter, (Professor, Dept. of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent, Belgium.), Dehua Deng, (Professor, School of Civil Engineering and Architecture, Central South Univ., Hunan, China.), and Fuqiang He, Ph.D., (Student, School of Civil Engineering and Architecture, Central South Univ., Hunan, China.)

Journal of Materials in Civil Engineering, Vol. 23, No. 3, March 2011, pp. 305-311, (doi:  http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0000168)

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Document type: Journal Paper
Abstract: Chloride-induced corrosion is the most important durability issue in a reinforced-concrete structure. In this paper, the multispecies model was used to describe the chloride transport in saturated concrete. The model was solved by using the finite-difference method by inputting parameters such as porosity, density, chemical composition of pore solution, diffusion coefficient, and chloride-binding isotherm. A depth-dependent diffusion coefficient, instead of a fixed diffusion coefficient, was used in this model. The chloride-binding isotherm was directly obtained from the diffusion test. Finally, the numerical simulation results were validated with experimental results. It was found that the numerical simulation results were in good agreement with the experimental results.


ASCE Subject Headings:
Chloride
Corrosion
Concrete structures
Numerical models

Author Keywords:
Chloride
Penetration
Concrete
Model