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Sustainability 2017, 9(2), 282; doi:10.3390/su9020282

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

1
Department of Plant Architectural Engineering, Kyonggi University, Suwon 16227, South Korea
2
Innovative Durable Building and Infrastructure Research Center, Hanyang University, Ansan 15588, South Korea
3
School of Architecture Chonnam National University, Gwangju 61186, South Korea
4
Civil and Environmental Engineering, Hannam University, Daejeon 34430, South Korea
*
Author to whom correspondence should be addressed.
Received: 3 November 2016 / Accepted: 7 February 2017 / Published: 15 February 2017
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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. View Full-Text
Keywords: crack; concrete; diffusion coefficient; roughness; wedge shape crack; concrete; diffusion coefficient; roughness; wedge shape
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Yang, K.-H.; Singh, J.K.; Lee, B.-Y.; Kwon, S.-J. Simple Technique for Tracking Chloride Penetration in Concrete Based on the Crack Shape and Width under Steady-State Conditions. Sustainability 2017, 9, 282.

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