Chemical, Morphological, and Fundamental Properties of Rejuvenated Asphalt Binders
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 2
Abstract
This study investigates the chemical characteristics of rejuvenators and the effect of different rejuvenators on the morphology and fundamental behavior of rejuvenated asphalt binders. Gas chromatography-mass spectroscopy (GC-MS) and atomic force microscopy (AFM) were conducted to determine the chemical composition of rejuvenators and asphalt surfaces’ morphology. Also, surface free energy (SFE) measurements were performed to quantify the cohesive bond energy of rejuvenated binders. The thin film oven test (TFOT)-aged performance graded (PG) 58-28 binder was rejuvenated with waste cooking oil (UT), chemically modified waste cooking oil (TR), and Hydrolene H90T (HL) at concentrations of 3%, 6%, and 9% by weight of the total binder. To understand the compatibility, styrene-butadiene-styrene (SBS) was also blended with rejuvenated binders. The experimental study found the variability of free fatty acid compositions in rejuvenators, which is hypothesized to affect pavement performance. Results showed that rejuvenation alters the surface microstructure of binders, which provides insights into the overall performance of the binder. Also, rejuvenation improves the moisture damage resistance of binders significantly. This experimental study found a good correlation between the chemical, morphological, and fundamental behavior of the rejuvenated binders, which is expected to help quantify the performance of rejuvenated asphalt mixes.
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Data Availability Statement
All data and models generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the Leslie Harris Centre of Regional Policy and Developments and Multi-Material Stewardship Board of the Government of Newfoundland and Labrador. The authors wish to thank Eco Oil Limited, NJs Kitchen Restaurant, HollyFrontier Corporation, and Yellowline Asphalt Products Ltd. for providing the materials necessary to perform this research.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 2 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Apr 24, 2020
Accepted: Jul 20, 2020
Published online: Nov 30, 2020
Published in print: Feb 1, 2021
Discussion open until: Apr 30, 2021
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