Abstract
The presentation began by discussing the need for alternative binders as a result of increasing asphalt demand, prices, and coking technology. The motivation for alternative binders is to: • enhance binder properties; • reduce dependence on crude oil; • improve the use of underutilized resources to supplement petroleum-based asphalt; • produce more environmentally friendly binders (reduced VOC); and • produce colored asphalt. A review of the research that has been conducted within the past ten years on alternative binders (bio-binders) indicates the following. • The physio-chemical properties of the bio-binders can vary significantly based on the feedstock and processing methods. • Bio-binders derived from lignocellulosic bio-mass have higher viscosity range than biobinders derived from bio-mass with high lipid content. • Bio-binders show significantly lower temperature susceptibility than petroleum-based binders, regardless of feedstock source. • The temperature range for viscous behavior is usually lower for bio-binders than petroleum-based (bitumen) binders. • The high temperature performance grade for bio-binders is typically close to those of bitumen binders. • The low temperature performance grade could vary significantly from bituminous binders depending on the feedstock type and processing method. • Susceptibility of bio-binder to U.V. and oxidative aging varies based on their feedstock source and processing methods. The storage stability of bio-binders could be improved if lighter compounds (aldehydes and ketones) are removed. The presentation concluded with questions yet to be addressed with bio-binders.
Original language | English (US) |
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Pages (from-to) | 655-659 |
Number of pages | 5 |
Journal | Asphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions |
Volume | 2013-January |
State | Published - Jan 1 2013 |
Externally published | Yes |
Event | Association of Asphalt Paving Technologists Annual Meeting, AAPT 2013 - Denver, United States Duration: Apr 7 2013 → Apr 10 2013 |
ASJC Scopus subject areas
- Civil and Structural Engineering