Improvement of RAP Binder Mobilization and Blending Efficiency Using Microwave Induction
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 10
Abstract
The mobilization of aged asphalt and the blending of aged and virgin asphalt are the keys to realize the high value of reclaimed asphalt pavement (RAP) in recycled asphalt mixtures, and the high performance of recycled asphalt mixtures. Microwave induction technology is used in this study to improve the mobilization aged asphalt and the blending efficiency of aged and virgin asphalt. A migration test, Fourier transform infrared spectroscopy (FTIR), and surface free energy (SFE) test were used as assessment tools. The results indicated that microwave induction can enhance the mobilization of RAP binder and the blending efficiency of aged and virgin binders. Microwave induction also overcomes the problem of low efficiency due to the outside-in energy transmission mode and secondary aging caused by the traditional heating method. This study reveals that the utilization of microwave heating in producing RAP asphalt mixtures can improve the RAP content and technical performance of a recycled asphalt mixture, and comprehensively promote the recycling of asphalt.
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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 work was financially supported by the Natural Science Foundation of Shandong Province under Grant Nos. ZR2021QE250 and ZR2021ME004.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 10 • October 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 22, 2022
Accepted: Mar 15, 2023
Published online: Jul 25, 2023
Published in print: Oct 1, 2023
Discussion open until: Dec 25, 2023
ASCE Technical Topics:
- Asphalt pavements
- Binders (material)
- Continuum mechanics
- Dynamics (solid mechanics)
- Electric power
- Energy engineering
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Fourier analysis
- Infrastructure
- Material tests
- Materials characterization
- Materials engineering
- Methodology (by type)
- Microwaves
- Mixtures
- Pavements
- Power transmission
- Recycling
- Solid mechanics
- Tests (by type)
- Transportation engineering
- Waves (mechanics)
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