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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 8212856, 7 pages
https://doi.org/10.1155/2017/8212856
Research Article

Chloride Transport in OPC Concrete Subjected to the Freeze and Thaw Damage

1Department of Civil and Environmental Engineering, Hanyang University, Ansan 15588, Republic of Korea
2School of Architecture, Chosun University, Gwangju 61452, Republic of Korea

Correspondence should be addressed to Ki Yong Ann

Received 7 October 2016; Revised 21 December 2016; Accepted 26 January 2017; Published 16 February 2017

Academic Editor: Rishi Gupta

Copyright © 2017 Ki Yong Ann et al. 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

To predict the durability of a concrete structure under the coupling degradation consisting of the frosting and chloride attack, microstructural analysis of the concrete pore structure should be accompanied. In this study, the correlation between the pore structure and chloride migration for OPC concrete was evaluated at the different cement content in the concrete mix accounting for 300, 350, and 400 kg/m3 at 0.45 of a free water cement ratio. The influence of frosting damage on the rate of chloride transport was assessed by testing with concrete specimens subjected to a rapid freezing and thawing cyclic environment. As a result, it was found that chloride transport was accelerated by frost damage, which was more influential at the lower cement content. The microscopic examination of the pore structure showed that the freezing environment increased the volume of the large capillary pore in the concrete matrix.