Mechanical Property Characterization of Warm-Mix Asphalt Prepared with Chemical Additives
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 2
Abstract
This study experimentally characterized the mechanical properties of warm-mix asphalt (WMA) prepared with two chemical additives: Evotherm 3G and Rediset LQ-1106, using laboratory-mixed and laboratory-compacted (LMLC) specimens. A conventional stone matrix asphalt (SMA), widely used in expressway overlay projects in the Chicago area, was selected as the control mixture. Two warm SMA mixtures were prepared by adding 0.5% Evotherm 3G and 0.5% Rediset LQ-1106 by weight of binder, respectively. The performances of the control SMA, Evotherm SMA, and Rediset SMA were evaluated and compared through extensive laboratory testing, including complex modulus, loading wheel track, indirect tension, and semi-circular beam at various curing time periods after compaction. This study concluded that both warm SMA mixtures provided slightly lower tensile strengths and complex moduli than the control SMA. However, the rutting and fracture resistance potentials of the two warm SMA mixtures were relatively similar to that of the control SMA. The curing time effect on the performance of the two warm SMA mixtures varied depending on the material property measured as well as the additive type. A strong correlation between strength gaining and curing time for the two warm SMA mixtures could not be concluded.
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Acknowledgments
This study is based on the mix designs and test procedures used in the Illinois Tollway Project, Short-Term Performance of Modified Stone Matrix Asphalt (SMA) Mixes Produced with Warm Mix Additives. This project was conducted in cooperation with the Illinois Center for Transportation, the Illinois Tollway, and Akzo Nobel Surface Chemistry, LLC. The contents of this study reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Illinois Center for Transportation, the Illinois Tollway, and/or Akzo Nobel Surface Chemistry, LLC. Trademark or manufacturers’ names appear in this paper only because they are considered essential to the study.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 2 • February 2014
Pages: 304 - 311
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 24, 2012
Accepted: Mar 4, 2013
Published online: Mar 6, 2013
Discussion open until: Aug 6, 2013
Published in print: Feb 1, 2014
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