Modelling the electrical resistivity of concrete with varied water and chloride contents

Xiang, N; Wang, Y; Oleiwi, HM; Chadwick, EA; Yao, G; Augusthus Nelson, L; Chen, X; Shabalin, I

Abstract

The electrical resistivity of concrete is an important property in the assessment of reinforcement corrosion in concrete and an essential parameter in the design and operation of cathodic protection for reinforced-concrete (RC) structures. Water and chloride contents in concrete are highly variable in RC structures in real-world hostile environments, meaning that characterisation of their coupled effects on concrete electrical resistivity is important. The currently available models are investigated in this paper. As all the current models are purely empirical, an improvement with a semi-empirical model is proposed. The improvement highlights the intrinsic linkage between concrete electrical resistivity and water content and the pore size distribution of concrete. The proposed model was tested using two sets of experimental data and was also compared with other two empirical models.

• Journal Article Type: Article
• Acceptance Date: Oct 18, 2018
• Online Publication Date: Feb 1, 2019
• Publication Date: Jun 1, 2020
• Deposit Date: Oct 23, 2018
• Publicly Available Date: Feb 1, 2020
• Journal: Magazine of Concrete Research
• Print ISSN: 0024-9831
• Electronic ISSN: 1751-763X
• Publisher: Thomas Telford
• Volume: 72
• Issue: 11
• Pages: 552-563
• DOI: https://doi.org/10.1680/jmacr.18.00198
• Publisher URL: https://doi.org/10.1680/jmacr.18.00198
• Related Public URLs: https://www.icevirtuallibrary.com/loi/jmacr
• Additional Information: Additional Information : Article originally titled, "Modelling concrete electrical resistivity at varied water and chloride contents".