Laboratory Evaluation of Warm-Mix Open Graded Friction Course Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 3
Abstract
The objective of this study was to evaluate the feasibility of using warm mix asphalt (WMA) technologies to produce quality open graded friction course (OGFC) mixtures. This evaluation was based on the comparison of Evotherm WMA and foamed WMA mixes with traditional hot mix asphalt (HMA) OGFC using three primary criteria: draindown, permeability, and abrasion resistance. The results of the study indicated that fibers could be removed from OGFC mixtures when using the WMA technologies included in this study. This conclusion was based on the performance evaluation of the mixtures, which showed that when the fibers were removed, the permeability of the mix almost doubled. Additionally, the WMA mixtures without fibers met typical aged abrasion loss requirements and the foamed WMA mixtures without fibers performed similarly with regard to aged abrasion resistance to the HMA mixture with fibers, whereas the HMA mix without fibers showed lower resistance to abrasion than the WMA mixtures. The enhanced performance of the mixtures can be attributed to the increased binder film thickness of the WMA mixtures compared to the HMA mixtures without fibers.
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Acknowledgments
The authors wish to acknowledge MeadWestvaco Corp. and the South Carolina Department of Transportation for their financial and technical support of this project.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 3 • March 2013
Pages: 403 - 410
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 11, 2012
Accepted: Jun 7, 2012
Published online: Aug 28, 2012
Published in print: Mar 1, 2013
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