Tran-SET 2020
Evaluation of Compatibility of Asphalt Binders and Aggregates
Publication: Tran-SET 2020
ABSTRACT
Stripping or moisture-induced pavement distress has been recognized as one of the major problems to most state Departments of Transportation (DOTs) and highway agencies. It is believed that the poor compatibility between asphalt binder and aggregates is one of the prominent reasons behind stripping. This study aims to analyze the compatibility of selected asphalt binders and aggregates used in Arkansas. Asphalt binders used in this study include two performance grade (PG) binders (PG 64-22) from two different sources along with their modified counterparts. Additionally, the Arkansas Department of Transportation (ARDOT) approved four different types of aggregates (sandstone, limestone, gravel, and dolomite) from four different sources to be evaluated in the laboratory. The surface free energy (SFE) measurements of these binders and aggregates are being estimated by using an optical contact angle (OCA) analyzer. The SFE data are then used to determine the compatibility between the asphalt binders and aggregates. The findings of this study are expected to help pavement researchers and highway professionals to find suitable asphalt binder-aggregate combinations in constructing the durable pavements.
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ACKNOWLEDGMENTS
The authors gratefully acknowledge the financial support of Transportation Consortium of South Central States (TranSET) to conduct this study. The authors are also thankful to Ergon Asphalt & Emulsions, Inc., Marathon Petroleum and other suppliers for providing test materials and technical support for this study.
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Information
Published In
Tran-SET 2020
Pages: 195 - 204
Editors: Craig Newtson, Ph.D., New Mexico State University, Susan Bogus Halter, Ph.D., University of New Mexico, and Marwa Hassan, Ph.D., Louisiana State University
ISBN (Online): 978-0-7844-8330-5
Copyright
© 2021 American Society of Civil Engineers.
History
Published online: Jan 12, 2021
Published in print: Jan 12, 2021
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