Effect of Carbon-Fiber Properties on Volumetrics and Ohmic Heating of Electrically Conductive Asphalt Concrete
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 9
Abstract
This experimental study examines the influence of different sources and lengths of carbon fiber (CF) on the volumetric properties, volume resistivity, and heat-generation efficiency of electrically conductive asphalt concrete (ECAC). This type of concrete has applications to pavement anti-icing and deicing in critical areas such as airfields where having surfaces free of ice and snow is of paramount importance. This study revealed that increasing CF length decreased the ECAC air void, voids in the mineral aggregate, and increased voids filled with asphalt. The source of CF influenced the electrical conductivity and heat-generation capability of ECAC and decreasing the CF length resulted in volume resistivity reduction and enhancement of heat-generation efficiency. The analyses results obtained from volume resistivity and heat-generation characterizations performed on ECAC cylindrical specimens were used for fabricating ECAC slabs. It was demonstrated that ECAC slab can melt a dense layer of ice under harsh winter conditions simulated in the laboratory environment.
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Acknowledgments
This paper was prepared from a study conducted at Iowa State University under the Federal Aviation Administration (FAA) Air Transportation Center of Excellence Cooperative Agreement 12-C-GA-ISU for the Partnership to Enhance General Aviation Safety, Accessibility and Sustainability (PEGASAS). The authors would like to thank the current project Technical Monitor, Mr. Benjamin J. Mahaffay, and the former project Technical Monitors, Mr. Jeffrey S. Gagnon (interim), Mr. Donald Barbagallo, and Dr. Charles A. Ishee, for their invaluable guidance on this study. The authors also would like to thank the PEGASAS Industry Advisory Board members for their valuable support and feedback. The assistance and efforts of Mr. Robert F. Steffes and Mr. Theodore Huisman, ISU CCEE lab managers, with the lab investigations are greatly appreciated. The authors would like to express their sincere gratitude to Mr. Paul Kremer, ISU CCEE Program Manager, for his significant assistance with lab accessibility. The help received from Ayoub Kazemiyan Zadeh, an ISU undergraduate student, for helping in specimen preparation process is greatly appreciated. The authors would like to thank Jebro Inc. for kindly donating the asphalt binder used in this study. Although the FAA sponsored this project, it neither endorses nor rejects the findings of this research. The presentation of this information is in the interest of invoking comments by the technical community on the results and conclusions of the research.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Dec 3, 2018
Accepted: Apr 17, 2019
Published online: Jun 25, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 25, 2019
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