Optimizing the Use of Local Aggregates in Stone-matrix Asphalt (SMA)

Developed in Europe, stone-matrix asphalt (SMA) is a mix design for exceptionally durable wearing courses. SMA is a hot-mix asphalt with gap-graded aggregate, high asphalt binder content, and large coarse-aggregate fraction. This design provides a stable stone-to-stone skeleton, which is held together by a rich mixture of asphalt cement, filler, and stabilizing agents such as fibers or asphalt modifiers. SMA has been used in the United States since 1991. The main purpose of this research project is to determine the applicability of relatively soft aggregate (e.g., limestone, dolomite, or gravel) for SMA by providing sufficient surface stability and durability for interstate highways.


    • English


    • Status: Active
    • Funding: $700000
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      Bureau of Materials and Physical Research
      126 East Ash Street
      Springfield, IL  United States  62704-4766
    • Managing Organizations:

      University of Illinois, Urbana-Champaign

      Illinois Center for Transportation
      1611 Titan Drive
      Rantoul, IL  United States  61866
    • Principal Investigators:

      Al-Qadi, Imad

    • Start Date: 20200816
    • Expected Completion Date: 20241231
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01747753
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-216
    • Files: RIP, STATEDOT
    • Created Date: Aug 14 2020 10:44AM