Experimental placement of stone matrix asphalt : project STP-8724 (00) X South Portland.

Details

• Creators:
  Soucie, Timothy
• Corporate Creators:
  Maine. Dept. of Transportation. Transportation Research Division
• Subject/TRT Terms:
  • Stone matrix asphalt
  • Pavements
  • Rutting
  • Superpave
  • Binders
  • Mix design
  • Aggregates
• Publication/ Report Number:
  42806
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maine
• Corporate Publisher:
  Maine. Dept. of Transportation
• Abstract:
  In September 2003 the Maine Department of Transportation used stone matrix asphalt and Superpave to ; renovate two intersections in South Portland, Maine. The experimental placement of stone matrix asphalt ; (SMA) and Superpave with modified binder was a part of pavement project STP-8724(00) X. The ; primary focus of this experiment is to look at the rutting resistance of SMA versus Superpave with ; modified binder. ; SMA mixtures consist of a large coarse aggregate content, fine aggregate, high filler content, asphalt ; cement with or without a modifier and usually a cellulose or mineral fiber. These mixtures contain a large ; coarse aggregate content (approximately 70 percent) and enough fine aggregate to help fill the voids in ; the coarse aggregate. The strength of this mix is gained from stone on stone contact. This mix is designed ; to have 3-4 percent air voids, and it has a relatively high asphalt content due to the high amount of voids ; in the mineral aggregate. The mix contains a high filler content (approximately 10 percent passing the No. ; 200 sieve), and it typically contains a polymer in the asphalt cement or fiber (cellulose or mineral) in the ; mixture to prevent drainage of the asphalt cement. This mixture has a surface appearance similar to that of ; an open graded friction course, however it has low in-place air voids similar to that of a dense graded ; HMA. The high asphalt content produces a mixture that is easily compacted and that should be durable. ; If the asphalt content is excessive it will tend to push the aggregate apart and prevent stone on stone ; contact. An asphalt content that produces 3-4 percent air voids in laboratory compacted samples is ; desirable. ; The intersections are at the junction of Route 1 and Turnpike Spur (703) and the junction of Route 1 and ; Westbrook Street. The pre-existing pavement conditions had moderate rutting and cracking. The goal of ; the experiment is to compare how the SMA and Superpave perform relative to each other.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28469/dot_28469_DS1.pdf
• File Type:
  [PDF - 905.11 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dfe9fb9fd60479bfd5794e7eaeaabe973f6ae4b85e98ffa71d8ad62581e210d4