Modeling the Diffusion of Chloride Ion in Concrete Using Cellular Automaton
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 6
Abstract
The diffusion of chloride ions is one of the main factors that arouses steel corrosion in concrete. In this paper, a two-dimension cellular automaton (CA) model was developed to simulate the diffusion process of chloride ions in concrete. The evolution rules of the proposed CA model were validated by comparing with the Fick’s second laws (FSL), and the distinctions between the CA model and the FSL were discussed pertaining to calculation methods and substantive characteristics of chloride ion penetration in concrete. Further, an improved CA model is proposed, called the JPCA model, which considers the jump probabilities of chloride ions varying with diffusion times and depths. The numerical simulations demonstrate that the computation results on the basis of the JPCA model are closer to the experimental data than those derived from the FSL. The JPCA model proposed in this paper provides a new way to study concrete suffering from chloride ion penetration.
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Acknowledgments
The authors would like to acknowledge the financial support of the Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period by the Ministry of Science and Technology of China with Grant No. 2006BAJ06B04 and the Western Communications Construction Scientific and Technological Project by the Research Institute of Highway Ministry of Transport of China with Grant No.2006 318 223 02-08.
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Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 6 • June 2012
Pages: 783 - 788
Copyright
© 2012. American Society of Civil Engineers.
History
Received: May 23, 2011
Accepted: Dec 2, 2011
Published online: Dec 4, 2011
Published in print: Jun 1, 2012
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