ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 65, (1) 69 - 76 (2021)


A SIMPLE MODEL FOR THE CHLORIDE DIFFUSION COEFFICIENT OF STEEL FIBRE REINFORCED CONCRETE
 
Chitakwa Mwila 1, Wang Qiannan 1, Peng Yuxiang 1, Gao Zesu 1, Zhang Weibin 1, Yang Lixia 1, Gu Chunping 2 , 3
 
1 School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
2 College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China
3 Zhejiang Construction Investment Group, Hangzhou 310013, China

Keywords: Chloride, Porosity, Paste, Interfacial transition zone, General self-consistent scheme
 

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.


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doi: 10.13168/cs.2021.0003
 
 
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