Effect of Laboratory Aging Levels on Asphalt Binder Chemical/Rheological Properties and Fracture Resistance of Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 3
Abstract
This study aimed to evaluate the effect of laboratory aging levels on chemical and rheological properties of asphalt binder as well as fracture performance of asphalt mixture. Compacted asphalt mixtures were laboratory aged at 85°C for 0, 2, 5, 7, and 10 days and then subjected to the semicircular bending (SCB) test. Asphalt binders were extracted from the aged samples for further chemical and rheological characterization. Chemical characterization included Fourier transform spectroscopy (FTIR) and gel permeation chromatography (GPC). Rheological tests included bending beam rheometer (BBR) and linear amplitude sweep (LAS) tests. Asphalt binder rheological characterization showed that the cracking resistance of asphalt binders decreased with an increase of aging level. Statistical analysis of SCB test results indicated that there is no significant drop in the critical strain energy release rate, , between 2- and 5-day aging, but 10-day aging resulted in a significant decrease in . It was observed that the aging susceptibility of asphalt mixtures in terms of SCB results was consistent with FTIR and LAS test results.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study was a part of Louisiana DOTD project 19-4B, implementation of semicircular bend test for quality control (QC)/quality assurance(QA) of asphalt mixtures. The authors would like to express their gratitude to the Louisiana Transportation Research Center for their support.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 3 • March 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Apr 27, 2021
Accepted: Jul 22, 2021
Published online: Dec 29, 2021
Published in print: Mar 1, 2022
Discussion open until: May 29, 2022
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