A SIMPLE MODEL FOR THE CHLORIDE DIFFUSION COEFFICIENT OF STEEL FIBRE REINFORCED CONCRETE

The chloride diffusion coefficient is the most important parameter when describing the chloride ingress in concrete. This paper proposes a simple model to predict the chloride diffusion coefficient of steel fibre reinforced concrete (SFRC). The chloride diffusion coefficients of a cement paste and a...

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Bibliographic Details
Main Authors: Mwila Chitakwa, Qiannan Wang, Peng Yuxiang, Gao Zesu, Zhang Weibin, Yang Lixia, Gu Chunping
Format: Article
Language:English
Published: University of Chemistry and Technology, Prague 2021-03-01
Series:Ceramics-Silikáty
Subjects:
Online Access: http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1392
Description
Summary:The chloride diffusion coefficient is the most important parameter when describing the chloride ingress in concrete. This paper proposes a simple model to predict the chloride diffusion coefficient of steel fibre reinforced concrete (SFRC). The chloride diffusion coefficients of a cement paste and an interfacial transition zone (ITZ) were calculated with their porosities, respectively. The ITZ porosity was obtained with a w/b ratio based on a porosity model. The chloride diffusion coefficient of the matrix was then determined according to the general self-consistent scheme, and the influence of the steel fibre was simplified with its volume fraction. The calculated chloride diffusion coefficient of the SFRC was verified with the results from the bulk diffusion tests and the accuracy was acceptable.
ISSN:0862-5468
1804-5847