Laboratory Study on the Effect of Asphalt Binder Rejuvenators on the Cracking Resistance of Hot Mix Asphalt

Asphalt binder rejuvenator use in Hot Mix Asphalt (HMA) has been gaining momentum not only to delay aging of the asphalt binder, but also to permit higher levels of binder replacement from recycled materials. In this study, an HMA mixture was designed with approximately 35 percent binder replacement from Reclaimed Asphalt Pavement (RAP). Per specifications, a binder grade adjustment from PG 64-22 to PG 58-28 was required. The control mixture contained a neat PG 58-28 binder. Three experimental binders contained asphalt binder that were a blend of PG 64-22 plus rejuvenator materials to produce a PG 58—28 binder. HMA mixtures containing all four asphalt were tested for cracking and rutting resistance. The laboratory study indicated that the control and experimental mixes had no difference I rutting resistance. Under short-term aging, all three experimental mixtures with rejuvenators had improved cracking resistance as measured by the Illinois Flexibility Index Test (IFIT). Under long-term aging conditions, no significant difference was observed among the control and the three experimental mixtures according to the Disc-Shaped Compact Tension (DCT) test. However, IFIT testing of long-term aged specimens showed improved cracking resistance for two of the three experimental mixtures compared to the control.

• Corporate Authors:

  Canadian Technical Asphalt Association

  ,   United States 
• Authors:
  • WIELINSKI, JC
  • Magill.L
  • Campbell, C
  • HUBER, GA
• Conference:
  • Proceedings of the Sixth-Second Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia
• Publication Date: 2017

Language

• English

Media Info

• Media Type: Print
• Pagination: pp. 309-329.
• Monograph Title: Proceedings of the Sixth-Second Annual Conference of the Canadian Technical Asphalt Association (CTAA): Halifax, Nova Scotia

Subject/Index Terms

• TRT Terms: Admixtures; Aging (Materials); Binders; Bituminous materials; Bituminous mixtures; Conferences; Cracking; Hot coated materials; Recycled materials; Rutting; Strength of materials
• Geographic Terms: Canada
• ITRD Terms: 4736: Admixture; 5292: Ageing; 4948: Binder; 4955: Bituminous materials; 4967: Bituminous mixture; 8018: Canada; 8525: Conference; 5211: Cracking; 4997: Hot coated material; 4966: Reclaimed asphalt; 5291: Rejuvenation; 3081: Rutting (wheel); 5544: Strength (mater)
• Subject Areas: Data and Information Technology; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01668513
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TAC
• Created Date: May 3 2018 3:19PM