The Effects of Lignin Additive on the Rheological Properties of Asphalt Binders
Faculty Mentor
Dr. Junan Shen
Location
Poster 192
Session Format
Poster Presentation
Academic Unit
Department of Civil Engineering
Keywords
Allen E. Paulson College of Engineering and Computing Student Research Symposium, Rolling Thin Film Oven, RTFO
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Presentation Type and Release Option
Presentation (File Not Available for Download)
Start Date
2022 12:00 AM
January 2022
The Effects of Lignin Additive on the Rheological Properties of Asphalt Binders
Poster 192
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Additives to asphalt are typically used to improve the properties such as increase its resistance to aging.
✓ Common additives: crumb rubber, polymers, and SBS.
✓ Can increase the polymerization of molecules in the asphalt binder resulting in a stronger structure that is more resistant to shear than the plain asphalt binder alone
✓ Other additives can reduce syneresis, resulting in a lower percentage weight loss over time in the asphalt binder.
- Lignin polymerizes into larger structures, resulting in a more rigid structure, which can increase the asphalt binders resistance to shear
✓ Currently used in cosmetics for its resistance to UV radiation, a common mode of ageing for asphalt.
- In 1998, John Warner and Paul Asantas developed the 12 principles of Green Chemistry. One of them is that renewable feedstocks. Since Lignin is a byproduct of the paper making process, it could serve as a renewable feedstock when looking at additives to asphalt. This is a benefit that is not prevalent in other commonly used additives for asphalt binder, with SBS and crumb rubber being a petroleum products.
