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Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride

Concrete structures under cyclic exposure to chlorides entail a higher risk of embedded steel corrosion along with accelerated ionic ingress from the environment. This study proposes a coupled transport model considering moisture and chloride distribution in concrete to investigate the influence of...

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Autores principales: Lee, Jae-Min, Hong, Sung In, Yang, Hee Jun, Jung, Dong-Hyuk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457048/
https://www.ncbi.nlm.nih.gov/pubmed/36079345
http://dx.doi.org/10.3390/ma15175966
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author Lee, Jae-Min
Hong, Sung In
Yang, Hee Jun
Jung, Dong-Hyuk
author_facet Lee, Jae-Min
Hong, Sung In
Yang, Hee Jun
Jung, Dong-Hyuk
author_sort Lee, Jae-Min
collection PubMed
description Concrete structures under cyclic exposure to chlorides entail a higher risk of embedded steel corrosion along with accelerated ionic ingress from the environment. This study proposes a coupled transport model considering moisture and chloride distribution in concrete to investigate the influence of a cyclic exposure condition on chloride penetration. In this model, pore size distribution to quantify the effective pore space for moisture and chloride mobilizations was determined to establish the governing equation for chloride transport through non-saturated concrete. From the simulation results, the rate of chloride penetration increases with decreasing ambient humidity levels due to the enhanced chloride convection. Finally, the coupled transport model was verified by comparing in-situ data, showing reasonable correlations with 0.83 and 0.93 of determinant coefficients for 22 and 44 years of exposure, respectively, while those obtained from LIFE 365 were much lower.
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spelling pubmed-94570482022-09-09 Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride Lee, Jae-Min Hong, Sung In Yang, Hee Jun Jung, Dong-Hyuk Materials (Basel) Article Concrete structures under cyclic exposure to chlorides entail a higher risk of embedded steel corrosion along with accelerated ionic ingress from the environment. This study proposes a coupled transport model considering moisture and chloride distribution in concrete to investigate the influence of a cyclic exposure condition on chloride penetration. In this model, pore size distribution to quantify the effective pore space for moisture and chloride mobilizations was determined to establish the governing equation for chloride transport through non-saturated concrete. From the simulation results, the rate of chloride penetration increases with decreasing ambient humidity levels due to the enhanced chloride convection. Finally, the coupled transport model was verified by comparing in-situ data, showing reasonable correlations with 0.83 and 0.93 of determinant coefficients for 22 and 44 years of exposure, respectively, while those obtained from LIFE 365 were much lower. MDPI 2022-08-29 /pmc/articles/PMC9457048/ /pubmed/36079345 http://dx.doi.org/10.3390/ma15175966 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lee, Jae-Min
Hong, Sung In
Yang, Hee Jun
Jung, Dong-Hyuk
Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title_full Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title_fullStr Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title_full_unstemmed Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title_short Numerical Modeling of Chloride Transport in Concrete under Cyclic Exposure to Chloride
title_sort numerical modeling of chloride transport in concrete under cyclic exposure to chloride
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457048/
https://www.ncbi.nlm.nih.gov/pubmed/36079345
http://dx.doi.org/10.3390/ma15175966
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