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Article

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

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Civil and Environmental Engineering Department, Hanyang University, Jaesung Civil Engineering Building, 222 Wangsimni-ro, Seongdong-Gu, Seoul 04763, Korea
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Department of Civil Engineering, Daejin University, 1007 Hoguk-ro, Pocheon-si 11159, Korea
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GFC R&D Co., Ltd., 155 Hoguk-ro, Pocheon-si 11158, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Jonathan Oti and Francesco Fabbrocino
Materials 2021, 14(15), 4063; https://doi.org/10.3390/ma14154063
Received: 11 June 2021 / Revised: 9 July 2021 / Accepted: 20 July 2021 / Published: 21 July 2021
(This article belongs to the Special Issue Functional Cement-Based Composites for Civil Engineering)
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. View Full-Text
Keywords: freeze–thaw; silicon carbide; graphite; steel fiber; thermal conductive material freeze–thaw; silicon carbide; graphite; steel fiber; thermal conductive material
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MDPI and ACS Style

Woo, B.-H.; Yoo, D.-H.; Kim, S.-S.; Lee, J.-B.; Ryou, J.-S.; Kim, H.-G. Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete. Materials 2021, 14, 4063. https://doi.org/10.3390/ma14154063

AMA Style

Woo B-H, Yoo D-H, Kim S-S, Lee J-B, Ryou J-S, Kim H-G. Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete. Materials. 2021; 14(15):4063. https://doi.org/10.3390/ma14154063

Chicago/Turabian Style

Woo, Byeong-Hun, Dong-Ho Yoo, Seong-Soo Kim, Jeong-Bae Lee, Jae-Suk Ryou, and Hong-Gi Kim. 2021. "Effects of Thermal Conductive Materials on the Freeze-Thaw Resistance of Concrete" Materials 14, no. 15: 4063. https://doi.org/10.3390/ma14154063

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