Development of a New Asphalt Mixture Containing Reacted and Activated Rubber and Reclaimed Asphalt Pavement via Superpave Mix Design and Marshall Mix Design

Reacted and Activated Rubber (RAR) is one of the pre-treated crumb rubber technologies. It has been developed as a new approach to produce crumb rubber modified asphalt mixture in the field. However, most of the previous studies are limited to the Marshall design method to obtain the optimum asphalt content. Further, none of these studies tried to add reclaimed asphalt pavement (RAP) to the RAR modified asphalt mixtures. The objective of this study was to conduct a Superpave mix design for determining the optimum asphalt content of asphalt mixture with RAR and RAP, and analyze the performance of RAR modified binder and mixture through a series of laboratory tests. Performance Grade (PG) 58-28 binder was used for this study. Both the Superpave mix design method and the Marshall mix design method selected the optimum asphalt binder content as 11.0% by weight of the mixture, where the virgin binder content was 6.6% and the RAR content was 4.4%. In general, the test results were favorable in rutting resistance performance and moisture resistance. The designed RAR modified mixtures will be used to construct trial sections in early August 2018 in Kalamazoo, Michigan.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK30 Standing Committee on Non-Binder Components of Asphalt Mixtures.
• Corporate Authors:

  Transportation Research Board

  ,    
• Authors:
  • Chen, Siyu
  • Gong, Fangyuan
  • You, Zhanping
  • Sousa, Jorge B
  • Ge, Dongdong
• Conference:
  • Transportation Research Board 98th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2019-1-13 to 2019-1-17
• Date: 2019

Language

• English

Media Info

• Media Type: Digital/other
• Features: References; Tables;
• Pagination: 5p

Subject/Index Terms

• TRT Terms: Asphalt content; Asphalt mixtures; Crumb rubber; Reclaimed asphalt pavements; Rutting; Superpave
• Uncontrolled Terms: Marshall mix design; Moisture susceptibility; Reacted and activated rubber
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01698391
• Record Type: Publication
• Report/Paper Numbers: 19-03022
• Files: TRIS, TRB, ATRI
• Created Date: Mar 2 2019 3:41PM