Evaluation of Polymer-Modified Hot-Mix Asphalt: Laboratory Characterization
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 4
Abstract
This paper presents a comprehensive study to evaluate the characteristics of polymer-modified asphalt binders and mixes using both the conventional and SuperPave tests. The polymers investigated included styrene–butadiene–styrene, styrene–butadiene–rubber, and complex polymers (or C-polymer). It is shown that the characteristics of polymer-modified asphalt binders and mixes may vary with the polymer type, polymer dosage, asphalt source, aggregate type, and mix type. As the polymer dosage increases, the high- and low-temperature characteristics of the asphalt binder become better, the creep stiffness decreases, the -value may increase, and the aging characteristics improve. The use of a polymer can enhance the dynamic stability of asphalt mix and the use of the rut depth can better measure the rut resistance. The presence of a polymer can also enhance the bending behavior of the asphalt mix at low temperatures. It is concluded that the AC-13 mix may generate better pavement performance than the AC-16 mix. The C-polymer has shown promising results in improving the characteristics of hot-mix asphalt.
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References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 21 • Issue 4 • April 2009
Pages: 163 - 170
Copyright
© 2009 ASCE.
History
Received: Jun 12, 2006
Accepted: Mar 1, 2007
Published online: Apr 1, 2009
Published in print: Apr 2009
Notes
Note. Associate Editor: Chiu Liu
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