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Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete

To solve the problem of black ice, many studies are being carried out. The key in recent days is enhancing the thermal conductivity of concrete. In this study, to improve the thermal conductivity, silicon carbide was used to substitute 50% and 100% of the fine aggregate. In addition, steel fiber is...

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Autores principales: Woo, Byeong-Hun, Yoo, Dong-Ho, Kim, Seong-Soo, Lee, Jeong-Bae, Ryou, Jae-Suk, Kim, Hong-Gi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8347990/
https://www.ncbi.nlm.nih.gov/pubmed/34361257
http://dx.doi.org/10.3390/ma14154063
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author Woo, Byeong-Hun
Yoo, Dong-Ho
Kim, Seong-Soo
Lee, Jeong-Bae
Ryou, Jae-Suk
Kim, Hong-Gi
author_facet Woo, Byeong-Hun
Yoo, Dong-Ho
Kim, Seong-Soo
Lee, Jeong-Bae
Ryou, Jae-Suk
Kim, Hong-Gi
author_sort Woo, Byeong-Hun
collection PubMed
description To solve the problem of black ice, many studies are being carried out. The key in recent days is enhancing the thermal conductivity of concrete. In this study, to improve the thermal conductivity, silicon carbide was used to substitute 50% and 100% of the fine aggregate. In addition, steel fiber is not only for enhancing the mechanical properties but could enhance thermal conductive material. Hence, the arched-type steel fiber was used up to a 1% volume fraction in this study. Furthermore, graphite was used for 5% of the volume fraction for enhancing the thermal conductivity. However, thermal damage would occur due to the difference in thermal conductivity between materials. Therefore, the thermal durability must be verified first. The target application of the concrete in this study was its use as road paving material. To evaluate the thermal durability, freeze–thaw and rapid cyclic thermal attacks were performed. The thermal conductivity of the specimens was increased with the increase in thermal conductive materials. Graphite has already been reported to have a negative effect on mechanical properties, and the results showed that this was the case. However, the steel fiber compensated for the negative effect of graphite, and the silicon carbide provided a filler effect. Graphite also had a negative effect on the freeze–thaw and rapid cyclic thermal attack, but the steel fiber compensated for the reduction in thermal durability. The silicon carbide also helped to improve the thermal durability in the same way as steel fiber. Comprehensively, the steel fiber enhanced all of the properties of the tests. Using 100% silicon carbide was considered the acceptable range, but 50% of silicon carbide was the best. Graphite decreased all the properties except for the thermal conductivity. Therefore, the content of graphite or using other conductive materials used should be carefully considered in further studies.
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spelling pubmed-83479902021-08-08 Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete Woo, Byeong-Hun Yoo, Dong-Ho Kim, Seong-Soo Lee, Jeong-Bae Ryou, Jae-Suk Kim, Hong-Gi Materials (Basel) Article To solve the problem of black ice, many studies are being carried out. The key in recent days is enhancing the thermal conductivity of concrete. In this study, to improve the thermal conductivity, silicon carbide was used to substitute 50% and 100% of the fine aggregate. In addition, steel fiber is not only for enhancing the mechanical properties but could enhance thermal conductive material. Hence, the arched-type steel fiber was used up to a 1% volume fraction in this study. Furthermore, graphite was used for 5% of the volume fraction for enhancing the thermal conductivity. However, thermal damage would occur due to the difference in thermal conductivity between materials. Therefore, the thermal durability must be verified first. The target application of the concrete in this study was its use as road paving material. To evaluate the thermal durability, freeze–thaw and rapid cyclic thermal attacks were performed. The thermal conductivity of the specimens was increased with the increase in thermal conductive materials. Graphite has already been reported to have a negative effect on mechanical properties, and the results showed that this was the case. However, the steel fiber compensated for the negative effect of graphite, and the silicon carbide provided a filler effect. Graphite also had a negative effect on the freeze–thaw and rapid cyclic thermal attack, but the steel fiber compensated for the reduction in thermal durability. The silicon carbide also helped to improve the thermal durability in the same way as steel fiber. Comprehensively, the steel fiber enhanced all of the properties of the tests. Using 100% silicon carbide was considered the acceptable range, but 50% of silicon carbide was the best. Graphite decreased all the properties except for the thermal conductivity. Therefore, the content of graphite or using other conductive materials used should be carefully considered in further studies. MDPI 2021-07-21 /pmc/articles/PMC8347990/ /pubmed/34361257 http://dx.doi.org/10.3390/ma14154063 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
Woo, Byeong-Hun
Yoo, Dong-Ho
Kim, Seong-Soo
Lee, Jeong-Bae
Ryou, Jae-Suk
Kim, Hong-Gi
Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title_full Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title_fullStr Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title_full_unstemmed Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title_short Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete
title_sort effects of thermal conductive materials on the freeze-thaw resistance of concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8347990/
https://www.ncbi.nlm.nih.gov/pubmed/34361257
http://dx.doi.org/10.3390/ma14154063
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