Implementation of Balance Mixture Design in Missouri Test Sections with Modifiers

MoDOT has identified a demonstration project which is a 6-mile stretch (approximately) of I-155 located in Pemiscot County. Nine separate modified mix designs were constructed during this project. The modifications include ground tire rubber (GTR), post-consumer recycled plastics (PCR-P), styrene-butadiene-styrene (SBS), and polyphosphoric acid (PPA). The experimental sections include both dense-graded and Stone Matrix Asphalt (SMA) mixture types. MoDOT also implemented new balanced mix design (BMD) test thresholds for different mix types according to the JSP for this project. The dense-graded mixtures have a minimum CT- Index threshold of 45 and the elevated BMD requirement is 80 for CT-Index. For SMA mixtures, the CT-Index requirement is 160. Maximum rut depth requirement for all mixes is 12.5 mm at 15,000 passes.


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    • Status: Active
    • Funding: $249998
    • Contract Numbers:


    • Sponsor Organizations:

      Missouri Department of Transportation

      1617 Missouri Boulevard
      P.O. Box 270
      Jefferson City, MO  United States  65102
    • Project Managers:

      Breeding, Scott

    • Performing Organizations:

      Missouri Center for Transportation Innovation

      Lafferre Hall
      416 S 6th St.
      Columbia, Missouri  United States  65201

      University of Missouri, Columbia

      Department of Civil Engineering
      Columbia, MO  United States  65211
    • Principal Investigators:

      Buttlar, William

    • Start Date: 20230510
    • Expected Completion Date: 20250131
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01913736
    • Record Type: Research project
    • Source Agency: Missouri Department of Transportation
    • Contract Numbers: TR202418
    • Files: RIP, STATEDOT
    • Created Date: Apr 4 2024 11:08AM