Nonlinear Coupling of Carbonation and Chloride Diffusion in Concrete
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 3
Abstract
External reinforced concrete elements exposed to chloride and/or will eventually have a lower pH, which in turn will depassivate the reinforcement and initiate corrosion, thus causing spalling. This paper seeks to address the complex multiphysics nature of concrete environmental damage, which is governed by coupled nonlinear partial differential equations. Heat, relative pore humidity, chloride, and carbonation are all implemented in a two-dimensional coupled nonlinear finite-difference code. Coupling between carbonation and chloride diffusion is explored in the context of both homogeneous and heterogeneous concrete models. Numerical simulations results are presented.
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Acknowledgments
The writers would like to thank Professors Xi and Saetta for their enthusiastic support throughout this research. The writers would also like to acknowledge the financial support of the Royal Thai Government Scholarship and the National Science Foundation through Grant No. CMS-0070051 (Dr. K. Chong).
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© 2005 ASCE.
History
Received: Apr 6, 2004
Accepted: Apr 6, 2004
Published online: Jun 1, 2005
Published in print: Jun 2005
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Note. Associate Editor: Yunping Xi
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