Evaluation of SMA Mixtures Produced with Asphalt-Rubber Binder in a LCPC Wheel Tester

SMA is a gap-graded asphalt mixture with a large proportion of high quality coarse aggregate and a high content of mastic (binder and filler). The larger proportion of coarse aggregate provides a greater stone-to-stone contact, which intends to provide mixtures more resistant to permanent deformation than the conventional Hot Mix Asphalt (HMA). The asphalt content is higher than the content typically used for a conventional HMA, which increases the film thickness. Fibers are used to prevent the drainage of the asphalt binder during the production and placement, and polymer-modified asphalt cements are usually used. In this paper, the behavior of SMA mixtures produced with different binders (conventional AC-20, polymer-modified, and asphalt-rubber), in terms of permanent deformation, is evaluated in a laboratory accelerated rut tester (LCPC Wheel Tester) and compared to the behavior of a conventional dense-graded HMA. The results show that SMA mixtures are better than HMA mixtures and SMA mixtures produced with asphalt-rubber are much closer to SMA mixtures produced with polymer-modified binder than to SMA mixtures produced with conventional asphalt.

• Corporate Authors:

  International Society for Asphalt Pavements

  4711 Clark Avenue, Suite G
  White Bear Lake, MN  United States  55110
• Authors:
  • FERNANDES JR, J L
  • NEVES, CLD
  • BERNUCCI, F
  • Bernucci, LLB
• Conference:
  • 10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS - AUGUST 12 TO 17, 2006, QUEBEC CITY, CANADA
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Pagination: p. vol1,635-44
• Monograph Title: 10th International Conference on Asphalt Pavements - August 12 to 17, 2006, Quebec City, Canada

Subject/Index Terms

• TRT Terms: Conferences; Mastic asphalt; Polymers; Rubber; Rutting; Strength of materials
• Geographic Terms: Canada
• Subject Areas: Design; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01084409
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: TAC
• Created Date: Jan 16 2008 8:56AM