LOWER TEMPERATURE MIXES ARE BEING PLACED SUCCESSFULLY IN MARYLAND

The performance of low temperature (i.e. produced in the ranges of 230, 260 and 275 degrees (F) instead of the usual 290 to 310 degree (F) range) bituminous concrete mixes that were produced and placed in Maryland between 1975 and 1978 indicates that the lower temperatures can be used with potential savings in production, energy, and placement costs while maintaining specification quality. The mixes met all criteria for mininum moisture content, stability, flow voids filled, voids, unit weight, density, texture, appearance and uniformity at all temperatures. At the same time, costs were reduced since production was increased (more material could be processed through production was increased (more material could be processed through the dryer), less fuel oil was needed to heat and dry the aggregate (Nearly .45 of a gallon were saved per ton of mix.), and operating time was reduced (The mix could be rolled as soon as it was placed). The material is workable with average hauls, mat thickness, and straight paving. Good planning can eliminate other problems. Furthermore, longer pavement life can be expected since the initial asphalt in the mix starts with less oxidation.

  • Supplemental Notes:
    • This paper was prepared by the Editor from the presentation made at the 17th Asphalt Paving Conference (University of Maryland, February 1979) by D.K. Sharretts and O.E. Briscoe.
  • Corporate Authors:

    Maryland Asphalt Association, Incorporated

    Baltimore Life Building, 901 North Howard Street
    Baltimore, MD  United States  21201
  • Publication Date: 1979-6

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Filing Info

  • Accession Number: 00196427
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM