Chloride Penetration Prediction in Concrete through an Empirical Model Based on Constant Flux Diffusion
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 8
Abstract
An empirical model based on constant flux is presented for chloride transport through concrete in atmospherical exposure conditions. A continuous supply of chlorides is assumed as a constant mass flux at the exposed concrete surface. The model is applied to experimental chloride profiles obtained from a real marine structure, and results are compared with the classical error-function model. The proposed model shows some advantages. It yields a better predictive capacity than the classical error-function model. The previously observed chloride surface concentration increases are compatible with the proposed model. Nevertheless, the predictive capacity of the model can fail if the concrete microstructure changes with time. The model seems to be appropriate for well-maturated concretes exposed to a marine environment in atmospherical conditions.
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Acknowledgments
We dedicate this work to the memory of our late colleague and friend Dr. Estanislao (Tanis) Viqueira, who passed away a few days after the acceptance of this article for publication. The authors thank the Ministerio de Economía y Competitividad of Spain and Fondo Europeo de Desarrollo Regional (FEDER) for the funding received for this research through project BIA2010-20548. M. P. López is grateful for a fellowship with the Formación Personal Investigador (FPI) program (reference BES-2011-046401).
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 8 • August 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 29, 2014
Accepted: Aug 5, 2014
Published online: Oct 15, 2014
Discussion open until: Mar 15, 2015
Published in print: Aug 1, 2015
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