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.
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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:
- 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