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Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures

Wave power marine concrete structures generate electrical energy using waves. They are exposed to a multi-deterioration environment because of air and hydrostatic pressure and chloride attack. In this study, the effect of air pressure repeatedly generated by water level change of wave power marine c...

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Autores principales: Lim, Changhyuck, Kim, Gyuyong, Kim, Gyeongtae, Lee, Bokyeong, Kim, Youngduck, Shin, Seungho, Nam, Jeongsoo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510354/
https://www.ncbi.nlm.nih.gov/pubmed/34640078
http://dx.doi.org/10.3390/ma14195675
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author Lim, Changhyuck
Kim, Gyuyong
Kim, Gyeongtae
Lee, Bokyeong
Kim, Youngduck
Shin, Seungho
Nam, Jeongsoo
author_facet Lim, Changhyuck
Kim, Gyuyong
Kim, Gyeongtae
Lee, Bokyeong
Kim, Youngduck
Shin, Seungho
Nam, Jeongsoo
author_sort Lim, Changhyuck
collection PubMed
description Wave power marine concrete structures generate electrical energy using waves. They are exposed to a multi-deterioration environment because of air and hydrostatic pressure and chloride attack. In this study, the effect of air pressure repeatedly generated by water level change of wave power marine concrete structures on the chloride-ion diffusion of marine concrete was analyzed. The chloride-ion diffusion of wave power marine concrete structures was evaluated. The results show that the air chamber and bypass room, which were subjected to repetitive air pressures caused by water level changes, showed a higher water-soluble chloride-ion content compared to the generator room and docking facility, which were subjected to atmospheric pressure. Field exposure tests and indoor chloride attack tests were performed using fabricated specimens to analyze the effect of pressure on chloride-ion penetration. It was confirmed that Portland blast furnace slag had a greater inhibitory effect on chloride-ion penetration than ordinary Portland cement. The concrete specimens subjected to pressure showed increased capillary pores and micro-cracks. We devised an equation for calculating the diffusion coefficient based on measured data and estimating the diffusion coefficient for the location receiving repeated air pressure by using the diffusion coefficient of the location receiving general atmospheric pressure.
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spelling pubmed-85103542021-10-13 Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures Lim, Changhyuck Kim, Gyuyong Kim, Gyeongtae Lee, Bokyeong Kim, Youngduck Shin, Seungho Nam, Jeongsoo Materials (Basel) Article Wave power marine concrete structures generate electrical energy using waves. They are exposed to a multi-deterioration environment because of air and hydrostatic pressure and chloride attack. In this study, the effect of air pressure repeatedly generated by water level change of wave power marine concrete structures on the chloride-ion diffusion of marine concrete was analyzed. The chloride-ion diffusion of wave power marine concrete structures was evaluated. The results show that the air chamber and bypass room, which were subjected to repetitive air pressures caused by water level changes, showed a higher water-soluble chloride-ion content compared to the generator room and docking facility, which were subjected to atmospheric pressure. Field exposure tests and indoor chloride attack tests were performed using fabricated specimens to analyze the effect of pressure on chloride-ion penetration. It was confirmed that Portland blast furnace slag had a greater inhibitory effect on chloride-ion penetration than ordinary Portland cement. The concrete specimens subjected to pressure showed increased capillary pores and micro-cracks. We devised an equation for calculating the diffusion coefficient based on measured data and estimating the diffusion coefficient for the location receiving repeated air pressure by using the diffusion coefficient of the location receiving general atmospheric pressure. MDPI 2021-09-29 /pmc/articles/PMC8510354/ /pubmed/34640078 http://dx.doi.org/10.3390/ma14195675 Text en © 2021 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
Lim, Changhyuck
Kim, Gyuyong
Kim, Gyeongtae
Lee, Bokyeong
Kim, Youngduck
Shin, Seungho
Nam, Jeongsoo
Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title_full Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title_fullStr Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title_full_unstemmed Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title_short Evaluation of Chloride-Ion Diffusion Characteristics of Wave Power Marine Concrete Structures
title_sort evaluation of chloride-ion diffusion characteristics of wave power marine concrete structures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510354/
https://www.ncbi.nlm.nih.gov/pubmed/34640078
http://dx.doi.org/10.3390/ma14195675
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