Table of Contents Author Guidelines Submit a Manuscript
Advances in Materials Science and Engineering
Volume 2016, Article ID 2042918, 11 pages
http://dx.doi.org/10.1155/2016/2042918
Research Article

Diffusion Decay Coefficient for Chloride Ions of Concrete Containing Mineral Admixtures

1Metropolitan Transit System Research Division, Korea Railroad Research Institute, Uiwang 16105, Republic of Korea
2Department of Civil and Environmental Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
3Department of Civil Engineering, Andong National University, Andong 36729, Republic of Korea
4Department of Preceding Research, Korea Conformity Laboratories, Seoul 08503, Republic of Korea
5Department of Civil and Environmental Engineering, Woosuk University, Jincheon 27841, Republic of Korea

Received 4 March 2016; Accepted 21 April 2016

Academic Editor: Yuyin Wang

Copyright © 2016 Jae-Im Park 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

The diffusion coefficient for chloride ions and the diffusion decay coefficient for chloride ions are essential variables for a service life evaluation of concrete structures. They are influenced by water-binder ratio, exposure condition, curing temperature, cement type, and the type and use of mineral admixture. Mineral admixtures such as ground granulated blast furnace slag, fly ash, and silica fume have been increasingly used to improve resistance against chloride ions penetration in concrete structures built in an offshore environment. However, there is not enough measured data to identify the statistical properties of diffusion decay coefficient for chloride ions in concrete using mineral admixtures. This paper is aimed at evaluating the diffusion decay coefficient for chloride ions of concrete using ordinary Portland cement or blended cement. NT BUILD 492 method, an electrophoresis experiment, was used to measure the diffusion coefficient for chloride ions with ages. It was revealed from the test results that the diffusion decay coefficient for chloride ions was significantly influenced by W/B and the replacement ratio of mineral admixtures.