Design and Performance of Mixes for Use as an Ultrathin Overlay

Friction loss is one of the most critical issues faced by agencies responsible for preserving a pavement structure. There are various methods used for surface treatments including seal coats, slurry seals, and ultra thin asphalt concrete overlays. Ultra thin overlays have increased in popularity due to their lack of noise and improved ride quality, as well as their reduced overall cost owing to the reduced layer thickness. This study had two major objectives: (i) determine the best mix type for use as an ultra thin overlay and (ii) evaluate the volumetric-based criterion that is currently used to determine the optimum binder content for mixes used in ultra thin overlays. The performance evaluation was conducted using laboratory techniques including the Hamburg Wheel Tracking Device and the Three Wheel Polishing Device. Out of the six potential gradations or aggregate structures that could be used as an ultra thin overlay, three were found to be suitable based on the performance tests. It was also observed that the optimum binder content, as defined by the volumetric criterion, was also generally the optimum based on performance tests conducted in the laboratory.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK40 Standing Committee on Surface Requirements of Asphalt Mixtures. Alternate title: Design and Performance of Mixes for Use as an Ultra Thin Overlay.
• Authors:
  • Hajj, Ramez
  • 0000-0003-0579-5618
  • Filonzi, Angelo
  • Smit, Andre
  • Bhasin, Amit
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 6p

Subject/Index Terms

• TRT Terms: Aggregate gradation; Binder content; Laboratory tests; Mix design; Performance tests
• Uncontrolled Terms: Ultrathin asphalt concrete overlays; Volumetric mix design
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01662960
• Record Type: Publication
• Report/Paper Numbers: 18-03417
• Files: TRIS, TRB, ATRI
• Created Date: Mar 19 2018 10:35PM