Verifying Quantities of Materials Used in Asphalt Mixtures at Production Facilities

Generally, asphalt mixtures contain asphalt binder, aggregate, and additives such as latex, ground tire rubber, warm mix additives, anti-strip additives, fibers, and mineral fillers. However, because of their environmental and economic benefits, reclaimed asphalt pavement (RAP) and reclaimed asphalt shingles (RAS) may also be used in asphalt mixtures; state departments of transportation (DOTs) have verified the percentages of RAP and RAS used in asphalt mixtures using different approaches such as stockpile measurements and plant recordation. However, additives are often introduced using equipment and control systems that do not provide good means to verify the added quantities. There is no widely acceptable procedures or guidelines for verifying quantities of materials used in asphalt mixtures at production facilities. There is a need to identify the procedures currently available for verifying quantities of materials used in asphalt mixtures at production facilities, develop procedures that better address the different applications and related issues, and prepare guidelines for the application of these procedures. These procedures and accompanying guidelines should help construction and materials engineers in enhancing quality assurance programs and ensuring compliance with contractual requirements.  The objectives of this research are to (1) recommend procedures for verifying quantities of materials used in asphalt mixtures at production facilities and (2) prepare guidelines for their application.


  • English


  • Status: Active
  • Funding: $350000
  • Contract Numbers:

    Project 09-69

  • Sponsor Organizations:

    National Cooperative Highway Research Program

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

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Khaleghi, Bijan

  • Performing Organizations:

    University of Nevada, Reno

    1664 N. Virginia Street
    Reno, Nevada  United States  89557
  • Principal Investigators:

    Hand, Adam

  • Start Date: 20220628
  • Expected Completion Date: 20241028
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01773377
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 09-69
  • Files: TRB, RIP
  • Created Date: May 27 2021 4:40PM