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

Mwila Chitakwa; Qiannan Wang; Peng Yuxiang; Gao Zesu; Zhang Weibin; Yang Lixia; Gu Chunping

doi:10.13168/cs.2021.0003

Ceramics-Silikáty (Mar 2021)

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

Mwila Chitakwa,
Qiannan Wang,
Peng Yuxiang,
Gao Zesu,
Zhang Weibin,
Yang Lixia,
Gu Chunping

Affiliations

Mwila Chitakwa: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Qiannan Wang: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Peng Yuxiang: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Gao Zesu: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Zhang Weibin: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Yang Lixia: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Gu Chunping

DOI: https://doi.org/10.13168/cs.2021.0003
Journal volume & issue: Vol. 65, no. 1
pp. 69 – 76

Abstract

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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.

Published in Ceramics-Silikáty

ISSN: 0862-5468 (Print); 1804-5847 (Online)
Publisher: University of Chemistry and Technology, Prague
Country of publisher: Czechia
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: http://www.ceramics-silikaty.cz/

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