Investigating the aging susceptibility of bio-modified asphalts

Ellie H. Fini, Daniel Oldham, Felix Smith Buabeng, Shahrzad Hossein Nezhad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

Asphalt binder supplies are shrinking, while the demand for it is increasing rapidly; this in turn has led to an increase in the price of asphalt. As the price of asphalt binder increases, the demand for alternative and renewable binder resources increases. Therefore, this paper investigates the effects of introduction of four different bio-binders (made from Corn Stover, Miscanthus Pellet, Swine Manure, and Wood Pellet) on the aging susceptibility of asphalt as measured by the change in rheological and chemical properties of a selected asphalt binder (PG64-22) as a result of oxidative aging. The results of Rotational Viscometer (RV) and Dynamic Shear Rheometer (DSR) were used to evaluate the rheological behavior of the various bio-modified asphalt binders. Overall, the rheological characterization showed that bio-binder from Wood Pellets had the most desirable properties in unaged status among all bio-modified specimens. However, this trend was reversed after aging, indicating Pellets bio-binder has thehighest susceptibility to oxidative aging. In order to quantitatively measure and compare the extent of aging, the chemical composition of each sample was obtained using the FTIR spectra. Oxidative aging was demonstrated through tracking the formation of carbonyl and sulfoxide groups due to aging. The results showed that aging susceptibilities varied significantly depending on the source of the biomass. The experimental results indicates that bio-binder from Swine Manure was least susceptible to aging, followed by bio-binder made from Corn Stover, Miscanthus Pellets, and Wood Pellets.

Original languageEnglish (US)
Title of host publicationAirfield and Highway Pavements 2015
Subtitle of host publicationInnovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference
EditorsJohn T. Harvey, Katie F. Chou
PublisherAmerican Society of Civil Engineers (ASCE)
Pages62-73
Number of pages12
ISBN (Electronic)9780784479216
DOIs
StatePublished - Jan 1 2015
Externally publishedYes
Event2015 International Airfield and Highway Pavements Conference: Innovative and Cost-Effective Pavements for a Sustainable Future - Miami, United States
Duration: Jun 7 2015Jun 10 2015

Publication series

NameAirfield and Highway Pavements 2015: Innovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference

Conference

Conference2015 International Airfield and Highway Pavements Conference: Innovative and Cost-Effective Pavements for a Sustainable Future
CountryUnited States
CityMiami
Period6/7/156/10/15

Keywords

  • Alternative binder
  • Asphalt
  • Bio-binder
  • Bio-oils
  • Pavement performance
  • Rheology

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Investigating the aging susceptibility of bio-modified asphalts'. Together they form a unique fingerprint.

  • Cite this

    Fini, E. H., Oldham, D., Buabeng, F. S., & Nezhad, S. H. (2015). Investigating the aging susceptibility of bio-modified asphalts. In J. T. Harvey, & K. F. Chou (Eds.), Airfield and Highway Pavements 2015: Innovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference (pp. 62-73). (Airfield and Highway Pavements 2015: Innovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784479216.007