Simple Technique for Tracking Chloride Penetration in Concrete Based on the Crack Shape and Width under Steady-State Conditions

Keun-Hyeok Yang, Jitendra Kumar Singh, Bang-Yeon Lee and Seung-Jun Kwon
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Keun-Hyeok Yang: Department of Plant Architectural Engineering, Kyonggi University, Suwon 16227, South Korea
Jitendra Kumar Singh: Innovative Durable Building and Infrastructure Research Center, Hanyang University, Ansan 15588, South Korea
Bang-Yeon Lee: School of Architecture Chonnam National University, Gwangju 61186, South Korea
Seung-Jun Kwon: Civil and Environmental Engineering, Hannam University, Daejeon 34430, South Korea

Sustainability, 2017, vol. 9, issue 2, 1-14

Abstract: Chloride attack is considered one of the most threatening deterioration mechanisms in concrete. Any cracks or other imperfections on the surface open up additional routes for chloride intrusion. This paper develops existing anisotropic (1-D) and isotropic (2-D) models for chloride diffusion in concrete with cracks by considering the crack shape and roughness. In order to verify the proposed model, concrete samples with crack widths from 0.0 to 0.4 mm were prepared and the chloride diffusion coefficients under steady-state conditions evaluated. The proposed model for a wedge-shaped model with roughness reduced chloride diffusion and provided more reasonable results than previous models based on rectangular shaped cracks with no roughness, which have tended to overestimate the effect. Our results revealed that including roughness in the model produced a 10%–20% reduction in chloride diffusion.

Keywords: crack; concrete; diffusion coefficient; roughness; wedge shape (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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