Effects of Electrically Conductive Additives on Laboratory-Measured Properties of Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 10
Abstract
An asphalt mixture generally behaves as an insulator. The addition of electrically conductive additives may produce conductive asphalt mixtures. The present study investigated the effectiveness of several commonly used conductive additives to produce electrically conductive hot-mix asphalt (HMA). The effects of three conductive additives, a micron-scale steel fiber, a carbon fiber, and graphite, on some laboratory-measured properties of HMA mixtures were investigated through mixture performance testing. The results from this study indicated that the micron-scale steel fiber was the most effective additive to produce conductive HMA. The inclusion of steel and carbon fibers improved permanent deformation properties, maintained the indirect tensile cracking resistance, and slightly reduced the dynamic modulus of the conductive HMA. The inclusion of graphite as an electrically conductive additive significantly improved the rut resistance, increased the dynamic modulus, and significantly reduced the indirect tensile cracking resistance of the conductive HMA mixtures.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 21 • Issue 10 • October 2009
Pages: 612 - 617
Copyright
© 2009 ASCE.
History
Received: Jun 12, 2008
Accepted: Apr 24, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
Notes
Note. Associate Editor: Gordon D. Airey
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