AAPT symposium: Alternative binders for the production of bituminous materials

Research output: Contribution to journalConference article

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 languageEnglish (US)
Pages (from-to)655-659
Number of pages5
JournalAsphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions
Volume2013-January
StatePublished - Jan 1 2013
Externally publishedYes
EventAssociation of Asphalt Paving Technologists Annual Meeting, AAPT 2013 - Denver, United States
Duration: Apr 7 2013Apr 10 2013

ASJC Scopus subject areas

  • Civil and Structural Engineering

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