Synthesis of Information Related to Highway Practices. Topic 50-14. Practices for the Fabrication of Hot Mix Asphalt Samples for Testing in Laboratories

Performance testing of asphalt concrete mixtures is becoming more widespread with the development and deployment of the Asphalt Mixture Performance Tester and similar purpose-built testing devices. It is also becoming more important with the development of tools and technologies that use these test results in engineering practice. The tests are sensitive to the setup of the test specimens and strict guidelines exist in the form of AASHTO and ASTM standard specifications for conducting the tests. While some standards provide directions for fabricating test specimens, detailed ruggedness studies and guidelines have not generally been established in this area. Individual laboratories follow their own procedures where the standards are not specific. The objective of this synthesis is to document state transportation agency procedures with respect to laboratory fabrication of asphalt concrete mixtures. The synthesis is intended to help state DOTs identify alternative and successful practices from other agencies. The synthesis will document the procedures used at DOT laboratories for the fabrication of asphalt samples. The study will examine procedures starting with when component materials are received and ending with the performance testing of the specimens. This would include the procedures and equipment used in sieving, batching, heating (asphalt, aggregate, and recycled components), blending (timing and mechanisms used), aging (short-term), compacting, and coring and cutting (if applicable). The synthesis will include a summary of the literature on the impact of procedures not specifically detailed in the relevant AASHTO standards. Information will be gathered through literature review, survey of state DOTs, and interviews with selected agencies for the preparation of case examples. Knowledge gaps and suggestions for research that could address those gaps will be identified.


  • English


  • Status: Proposed
  • 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

  • Start Date: 20180820
  • Expected Completion Date: 0
  • 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