Laboratory Investigation into Electrically Conductive HMA Mixtures
An asphalt mixture generally behaves as an insulator. The addition of electrically conductive additives may produce conductive asphalt mixtures. Traditional technology of applying carbon-based additives compromises the mechanical properties of hot-mix asphalt (HMA) mixtures and prevents the wide applications of electrically conductive asphalt. The present study investigated into various options of producing electrically conductive HMA mixtures. Electrical conductivity was evaluated for asphalt mixtures containing micron-scale steel fiber, aluminum chips, and graphite as conductive fillers. Further investigation was conducted relating the electrical conductivity to other engineering properties of HMA mixtures. The results from this study indicated that the micron-scale steel fiber provided the most efficient way to increase the electrical conductivity of HMA mixtures. The percolation point for the micron-scale steel fiber was 0.2% (by volume of asphalt binder); whereas, those points for graphite and aluminum powder were much higher. A strong relationship was discovered between the electrical resistivity and mechanical properties for asphalt mixture specimens under indirect tensile strength and beam fatigue testing. Further studies are recommended to explore the many applications related to the electrical conductivity of HMA mixtures.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
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Supplemental Notes:
- This paper is only available on the CD-ROM located in the back of the hardcopy volume.
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Authors:
- Huang, Baoshan
- Cao, Jingyao
- Chen, Xingwei
- Shu, Xiang
- He, Wenbin
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Conference:
- 2006 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
- Location: Savannah Georgia, United States
- Date: 2006-3-27 to 2006-3-29
- Publication Date: 2006
Language
- English
Media Info
- Media Type: CD-ROM
- Features: Figures; References; Tables;
- Pagination: pp 1235-1253
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Serial:
- Journal of the Association of Asphalt Paving Technologists
- Volume: 75
- Publisher: Association of Asphalt Paving Technologists (AAPT)
- ISSN: 0270-2932
- Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109
Subject/Index Terms
- TRT Terms: Aluminum; Asphalt mixtures; Bituminous binders; Electrical conductivity; Electrical resistivity; Fatigue tests; Fillers (Materials); Graphite; Hot mix asphalt; Laboratory studies; Mechanical properties; Percolation; Properties of materials; Steel fibers
- Uncontrolled Terms: Indirect tensile strength
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 01041456
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 30 2007 1:29PM