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Modelling of chloride penetration in unsaturated concrete

Geng, J, Li, L and Wang, Y 2015, 'Modelling of chloride penetration in unsaturated concrete' , Advances in Cement Research, 28 (1) , pp. 51-61.

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In this paper, a new model is proposed to describe the coupled transport of ionic species and ionic solution in unsaturated concrete. The main difference between the present model and most existing models is the inclusion of osmotic effect due to small pore sizes and osmosis-flow due to electrochemical reactions taking place at two electrodes. Chemical- and electro-osmosis is a well-known phenomenon in soils and clays. Cement and concrete materials, whose microscopic properties are very similar to clays, are expected to have a similar behaviour. However, despite the large amount of work that has been published on the osmosis of soils and clays, there is very little work on the cement and concrete materials. The aim of this paper is to address this problem. The model proposed in the paper is applied to predict the chloride penetration in unsaturated concrete and the electrochemical chloride removal in chloride-contaminated concrete by applying an external current. Numerical examples are presented and results are validated using published experimental data.

Item Type: Article
Themes: Built and Human Environment
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Advances in Cement Research
Publisher: Institute of Civil Engineers
Refereed: Yes
ISSN: 0951-7197
Related URLs:
Funders: EU Research Council, National Natural Science Foundation of China (NSFC), Zhejiang University China
Depositing User: Y Wang
Date Deposited: 07 Jul 2015 16:44
Last Modified: 09 Feb 2016 13:54

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