Compaction of Soils and Base Materials using Superpave Gyratory Compactors

Texas Department of Transportation (TxDOT) utilizes impact hammer compaction in test procedures Tex-11343: Laboratory Compaction Characteristics and Moisture-Density Relationship of Base Materials and Tex-11443 Laboratory Compaction Characteristics and Moisture Density Relationship of Subgrade, Embankment Soils, and Backfill Material to develop moisture-density relationships and fabricate specimens for strength testing. Although recent modifications to the test procedure enabled improvements in the precision of specimen molded moisture content and density, the precision of compressive strength remains a problem. This poor precision of compressive strength results in conflicting test results regarding whether a material meets specification requirements. The conflicting test results cause project delays and increase the dollar value of a material source. The research team will use the Superpave Gyratory Compactor (SGC) to analyze whether SGC compaction enables improved precision of compressive strength tests for unbound materials; this project will examine use of the SGC in generation of moisture-density curves. Successful use of the SGC for soils and base materials will better represent field compaction in the lab, achieve more uniform compaction of test specimens, and reduce the variability of strength results.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Adams, Joe

  • Performing Organizations:

    Texas A&M Transportation Institute, College Station

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Sebesta, Stephen

  • Start Date: 20150901
  • Expected Completion Date: 20170831
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01619658
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6883
  • Files: RiP, STATEDOT
  • Created Date: Dec 21 2016 4:17PM