Enhanced Thermal Insulation of Steel Slag Based on Ultrathin Friction Course with Ceramic Fiber
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 10
Abstract
Rutting distress and urban heat island effects correlated to high temperatures negatively affect asphalt pavement, so reducing pavement temperature and heat absorption is necessary. This study developed a thermal insulation friction course (TIFC) made of steel slag (SS), limestone, and ceramic fiber (CF). Stone matrix asphalt (SMA)-5 asphalt mixtures with various CF contents and aggregate types were used as the TIFC. Pavement performance and thermal constants were tested. Cooling and heat insulation performance in the laboratory and outdoors were conducted through infrared temperature image characterization, respectively. Corresponding heat absorption was then calculated. Results showed that SS and lower CF result in lower volume performance. SS can enhance TIFC’s higher skid resistance. The highest moisture resistance and interlayer shear strength appeared when SS and 2% CF were employed. SS and CF reduced the asphalt mixture’s temperature and heat absorption. TIFC with SS and 2% CF showed the lowest heat conductivity, diffusivity, and maximum interlayer shear strength. TIFC with SS and 2% CF also showed maximum cooling effects. TIFC will help to address rutting and urban heat island effects, which is beneficial for road engineering and environmental sustainability.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors are grateful for the financial support from the Technological Innovation Major Project of Hubei Province (2019AEE023), the Key R&D Program of Hubei Province (2020BCB064), the National Natural Science Foundation of China (52108414), and the Scientific Research Starting Foundation of Wuhan Institute of Technology (No. K202021).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 10 • October 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Nov 13, 2022
Accepted: Mar 23, 2023
Published online: Jul 31, 2023
Published in print: Oct 1, 2023
Discussion open until: Dec 31, 2023
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