A one-mile section of Interstate 15, involving the two southbound lanes, became part of an experimental project in asphalt pavement recycling. Approximately 3,800 feet of the travel lane was excavated down to the gravel base and replaced with recycled mix. Another 1,480-foot section of the travel lane was excavated down to the gravel base and replaced with coventional hot-mix. Finally, a 1.5-inch over the entire mile section of the passing lane. Comparison tests were to be conducted on the three sections. The process of recycling involved hauling the broken-up roadway to the plant site and crushing it to pass a one-inch minus sieve. The crashed material was then carried by conveyor to the Thermo-Matic unit where it was tumbled and heated to a temperature of approximately 285 degrees F. At the lower end of the heater drum new lizuid asphalt, plus a softening agent for the old asphalt, was added to the crushed aggregate and the mixture was run through a conventional pugmill and discharged into trucks. After hauling out to the job, the recycled mix was put down and rolled with conventional equipment as a regular hot-mix. On the 3,800 feet of recycled roadway approximately 30 tons of liquid AR-8000 asphalt was used, while on the 1-480 feet of conventional hot-mix approximately 92 tons of AR-8000 liquid asphalt were used.

  • Corporate Authors:

    National Asphalt Pavement Association (NAPA)

    5100 Forbes Boulevard
    Lanham, Maryland  United States  20706
  • Publication Date: 1974-12

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Filing Info

  • Accession Number: 00080474
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM