The Aging Susceptibility of Rejuvenated Asphalt Binders: Determining the Effectiveness of Asphalt Rejuvenators and Additives in a Simulated RAP Binder

There is strong interest the use of recycled materials in asphalt pavements for cost and environmental reasons. Rejuvenating or recycling oils can be used to bring aged asphalt binder back to its original viscosity, but questions remain as to whether the restored binder ages at the same rate as a virgin binder of the same viscosity. If the rejuvenated binders age more quickly, this could limit the working life of the resulting mixtures. Selected rejuvenating oils and additives were evaluated by measuring both their efficiency at restoring aged binder viscosity, and also the aging characteristics of the restored binders. First, an aged asphalt binder was prepared by extended oxidation in the Rolling Thin Film Oven (RTFO). After treatment with a rejuvenator/additive, the binder was subjected to a second aging step. The softening efficiency and aged penetration retention were calculated from the penetration before and after the aging steps. Differences in perfomance between the oils and fatty amine additives and oil/additive combinations were found. Generally speaking, the rejuvenating binders aged more quickly than the original binders, but both the choice of rejuvenating oil and additive is important. These results may suggest more sustainable strategies for asphalt rejuvenation going forward.

• Corporate Authors:

  Canadian Technical Asphalt Association

  ,   United States 
• Authors:
  • GORSUCH, C
  • Franklin, R
  • Louis, K
• Conference:
  • Proceedings of the Fifty-Ninth Annual Conference of the Canadian Technical Asphalt Association (CTAA): Winnipeg, Manitoba
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Print
• Pagination: pp. 143-156.
• Monograph Title: Proceedings of the Fifty-Ninth Annual Conference of the Canadian Technical Asphalt Association (CTAA): Winnipeg, Manitoba

Subject/Index Terms

• TRT Terms: Admixtures; Aging (Materials); Binders; Bituminous materials; Conferences; Recycling; Viscosity
• Geographic Terms: Canada
• ITRD Terms: 4736: Admixture; 5292: Ageing; 4948: Binder; 4955: Bituminous materials; 8018: Canada; 8525: Conference; 4573: Recycling (mater); 5936: Viscosity
• Subject Areas: Data and Information Technology; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01591542
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TAC
• Created Date: Feb 26 2016 10:40AM