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Advances in Materials Science and Engineering
Volume 2015 (2015), Article ID 616980, 8 pages
http://dx.doi.org/10.1155/2015/616980
Research Article

Prediction of Chloride Penetration into Hardening Concrete

Department of Architectural Engineering, Kangwon National University, Chuncheon-si 200 701, Republic of Korea

Received 30 April 2015; Revised 29 June 2015; Accepted 1 July 2015

Academic Editor: Antônio G. B. de Lima

Copyright © 2015 Wei-Jie Fan and Xiao-Yong Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In marine and coastal environments, penetration of chloride ions is one of the main mechanisms causing concrete reinforcement corrosion. Currently, most of experimental investigations about submerged penetration of chloride ions are started after the four-week standard curing of concrete. The further hydration of cement and reduction of chloride diffusivity during submerged penetration period are ignored. To overcome this weak point, this paper presents a numerical procedure to analyze simultaneously cement hydration reaction and chloride ion penetration process. First, using a cement hydration model, degree of hydration and phase volume fractions of hardening concrete are determined. Second, the dependences of chloride diffusivity and chloride binding capacity on age of concrete are clarified. Third, chloride profiles in hardening concrete are calculated. The proposed numerical procedure is verified by using chloride submerged penetration test results of concrete with different mixing proportions.