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Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions

The transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride so...

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Detalles Bibliográficos
Autores principales: Qu, Fulai, Zhang, Jinkai, Liu, Guirong, Zhao, Shunbo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032500/
https://www.ncbi.nlm.nih.gov/pubmed/35454610
http://dx.doi.org/10.3390/ma15082917
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author Qu, Fulai
Zhang, Jinkai
Liu, Guirong
Zhao, Shunbo
author_facet Qu, Fulai
Zhang, Jinkai
Liu, Guirong
Zhao, Shunbo
author_sort Qu, Fulai
collection PubMed
description The transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride solution, long-term immersion in circulating sodium chloride solution and dry–wet cycles in circulating sodium chloride solution) were considered in chloride ion diffusion experiments. Experimental results indicated that the chloride ion content at a certain depth increased with erosion age. The chloride ions in static sodium chloride solution transported more rapidly than those under dry–wet cycle conditions. Moreover, the chloride ion content of concrete under dry–wet cycles of the circulating sodium chloride solution was slightly higher than that under long-term immersion in the circulating solution. Based on Fick’s second law, empirical equations for the chloride diffusion coefficient and chloride content at the surface of concrete were proposed by fitting experimental data, and the values of correlation coefficients of different exposure conditions were suggested. By comparison with the experiment results, it was verified that the calculation formula had better applicability. This method could be used to predict and analyze the chloride ion content under different exposure conditions.
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spelling pubmed-90325002022-04-23 Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions Qu, Fulai Zhang, Jinkai Liu, Guirong Zhao, Shunbo Materials (Basel) Article The transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride solution, long-term immersion in circulating sodium chloride solution and dry–wet cycles in circulating sodium chloride solution) were considered in chloride ion diffusion experiments. Experimental results indicated that the chloride ion content at a certain depth increased with erosion age. The chloride ions in static sodium chloride solution transported more rapidly than those under dry–wet cycle conditions. Moreover, the chloride ion content of concrete under dry–wet cycles of the circulating sodium chloride solution was slightly higher than that under long-term immersion in the circulating solution. Based on Fick’s second law, empirical equations for the chloride diffusion coefficient and chloride content at the surface of concrete were proposed by fitting experimental data, and the values of correlation coefficients of different exposure conditions were suggested. By comparison with the experiment results, it was verified that the calculation formula had better applicability. This method could be used to predict and analyze the chloride ion content under different exposure conditions. MDPI 2022-04-16 /pmc/articles/PMC9032500/ /pubmed/35454610 http://dx.doi.org/10.3390/ma15082917 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
Qu, Fulai
Zhang, Jinkai
Liu, Guirong
Zhao, Shunbo
Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title_full Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title_fullStr Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title_full_unstemmed Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title_short Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
title_sort experimental study on chloride ion diffusion in concrete affected by exposure conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032500/
https://www.ncbi.nlm.nih.gov/pubmed/35454610
http://dx.doi.org/10.3390/ma15082917
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