Synthesis of Information Related to Highway Practices. Topic 50-14. Practices for Fabrication Asphalt Specimens for Testing in Laboratories

Performance testing of asphalt mixtures is becoming more widespread for a variety of reasons and with a variety testing devices. The tests results are sensitive to the preparation of the specimens. Guidelines exist for conducting the tests, however they do not all provide uniform or comprehensive direction for fabricating test specimens. Detailed ruggedness studies identifying critical sources of variability have rarely been conducted in this area. Therefore, individual laboratories follow their own procedures where the standards are not specific. The objective of this synthesis is to document state departments of transportation (DOTs) procedures with respect to laboratory fabrication of asphalt performance test specimens. For the purpose of this synthesis fabrication begins with a mixture and results in a prepared test specimen. Information about specimen fabrication to be gathered includes (but is not limited to): (1) Purpose of the testing (e.g., mix design, quality assurance, research); (2) Methodologies used by DOTs and targeted non-DOT asphalt testing labs; (3) Tests performed and standards or procedures used (AASHTO, ASTM, in-house, etc.); (4) Equipment used (splitting, charging mold, compaction, coring, cutting, etc.); (5) Short and long-term aging procedures; (6) Lab testing sequencing and time limitations (maximum shelf life, operational disruptions, etc.); and (7) Common issues encountered and solution developed. Information will be gathered through literature review, survey of state DOTs and targeted non-DOT entities, and interviews with selected entities for the preparation of case examples. The DOT survey should be directed to the voting member of the AASHTO Committee on Materials and Pavements (COMP). Knowledge gaps and suggestions for research that could address those gaps will be identified.


  • English


  • Funding: $45000
  • Contract Numbers:

    Project 20-05, Topic 50-14

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Gause, Jo

  • Performing Organizations:

    University of New Hampshire, Durham

    Department of Civil Engineering
    Durham, NH  United States  03824
  • Principal Investigators:

    Daniel, Jo Sias

  • Start Date: 20180501
  • Expected Completion Date: 20181030
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01669003
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-05, Topic 50-14
  • Files: TRB, RiP
  • Created Date: May 14 2018 3:04PM