AN EVALUATION OF LOWER MIXING TEMPERATURES FOR BITUMINOUS PAVING MIXES. FINAL REPORT

The primary objective of this project was to investigate the economic potential and the engineering properties of hot plant-mixed bituminous mixes produced at lower than normal mixing temperatures. This was accomplished by monitoring plant and field operations of a hot bituminous paving project which approximately 52 percent of the base and binder courses were mixed at 225 degrees F (+25 degrees F) instead of the normal 300 degree F (+25 degree F). Also, cores were taken approximately 3.5 years after construction; and the bitumen properties were analyzed. No significant differences were noted in the engineering properties of the different mixing temperatures. Production and roadway operations went smoothly. While no monetary savings were achieved on this project, the potential for savings is very good since the energy consumption for production of the lower temperature mixes was 20.6 percent less than for the normal temperature. Bitumen properties after 3.5 years of service indicate the lower temperature mixes to be equal to or superior to the normal temperature mixes. A recommendation is made to remove the lower mixing temperature limit for bituminous mixes. (Author)

  • Corporate Authors:

    Mississippi State Highway Department

    Research and Development Division, P.O. Box 1850
    Jackson, MI  United States  39215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Crawley, A B
  • Publication Date: 1985-3

Media Info

  • Features: References; Tables;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00395667
  • Record Type: Publication
  • Report/Paper Numbers: MSHD-RD-85-069
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Feb 28 1986 12:00AM