AN INVESTIGATION OF RECYCLING BITUMINOUS PAVEMENTS

Interest in cold-mixed in-place recycling of asphalt pavements is becoming more widespread. This final report summarized the findings of four major studies conducted over a period of 5 years. Guidelines were developed that would enable the paving engineer to determine if an existing pavement was a candidate for certain recycling methods and to assist the construction engineer in implementing the recycling method previously identified. The effects of amount and type of added binder (AE-150, AE-90, MC-3000 and AC2.5), amount of added moisture, added virgin aggregate, the compactive effort and curing time on the behavior of cold-recycled asphalt mixtures were studied. A creep test was used to evaluate the long range behavior of recycled mixes. Different softening agents were used--AE-150, AE-300, AC2.5, Reclamite and Mobilsol. It was determined that indices obtained from the gyratory compactor could be used to determine the optimum binder content of a recycled mix and that most of the rejuvenating action took place during the compaction process. A short term investigation was conducted to determine the effect of gradation on the behavior of recycled mixtures, 3 different gradations, two binder types (EA and Foamed Asphalt) and two levels of binder content (0.5% and 1.0%). Some differences in behavior were observed. These differences were primarily due to the difference in surface area. (FHWA)

  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284

    Indiana Department of Highways

    Indianapolis, IN  United States 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Tia, M
    • IIDA, A
    • MCKINNEY, J
    • WOOD, L
  • Publication Date: 1983-3

Media Info

  • Pagination: 59 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00387776
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-IN-83-4 Final Rpt.
  • Contract Numbers: 1(20) Part 11
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Sep 28 1985 12:00AM