Investigating effect of amine based additives on asphalt rubber rheological properties

Amadou Bocoum, Shahrzad Hosseinnezhad, Elham H. Fini

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

14 Scopus citations

Abstract

This paper investigates merits of introducing bio-binder and liquid Warm Mix Asphalt (WMA) additives to asphalt rubber to enhance its rheological properties. It is hypothesized that amine-based liquid additives can facilitate rubber devulcanization and speed up the release of rubber polymer into the asphalt matrix. This in turn can enhance asphalt rubber rheological properties including high temperature properties. This paper specifically focuses on high temperature properties and temperature susceptibility of the asphalt rubber modified by amine-based additives. High temperature properties were investigated by quantifying the effect of warm mix asphalt additives (Rediset and Evotherm) and bio-binder on the shear susceptibility and temperature susceptibility of asphalt rubber. Ambient crumb rubber with 10% and 15% concentrations by the weight of asphalt binder was used in this study. The rotational viscometer was used to evaluate the effect of additives on the asphalt rubber high temperature properties and pumpability. FT-IR analysis was studied to determine presence of devulcanized rubber polymer inside the asphalt matrix. It was found that all three additives reduced the viscosity and improved the pumpability significantly. In addition, the effect of additives found to be more significant when higher percentages of rubber were used. Additives with higher perecentages of amine compunds found to be more effective in devulcanizing rubber.

Original languageEnglish (US)
Title of host publicationAsphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014
PublisherTaylor and Francis - Balkema
Pages921-931
Number of pages11
ISBN (Print)9781138027121
DOIs
StatePublished - 2014
Event12th International Conference on Asphalt Pavements, ISAP 2014 - Raleigh, NC, United States
Duration: Jun 1 2014Jun 5 2014

Publication series

NameAsphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014
Volume1

Other

Other12th International Conference on Asphalt Pavements, ISAP 2014
CountryUnited States
CityRaleigh, NC
Period6/1/146/5/14

Keywords

  • Asphalt binder
  • Bio-binder
  • Crumb rubber
  • Devulcanization
  • Warm mix additive

ASJC Scopus subject areas

  • Building and Construction
  • Architecture

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  • Cite this

    Bocoum, A., Hosseinnezhad, S., & Fini, E. H. (2014). Investigating effect of amine based additives on asphalt rubber rheological properties. In Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014 (pp. 921-931). (Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014; Vol. 1). Taylor and Francis - Balkema. https://doi.org/10.1201/b17219-113