Cold recycle pavement using urea urethane dispersion agent and rubber : final report.
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Cold recycle pavement using urea urethane dispersion agent and rubber : final report.

Filetype[PDF-750.25 KB]


English
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  • Creators:
  • Corporate Contributors:
    Oregon. Dept. of Transportation. Research Unit
  • Subject/TRT Terms:
  • Publication/ Report Number:
    OR-RD-95-12
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Oregon
  • Corporate Publisher:
    Oregon. Dept. of Transportation. Research Unit
  • Abstract:
    This research study was a joint venture of the Oregon Department of Transportation (ODOT), Evans, Loosely, Inc., and Roseburg Paving Company, to evaluate the use of Urea Urethane Dispersion (UUD) agent, with finely ground tire rubber, high float emulsion, and recycled asphalt pavement (RAP). The combination of materials was reported to increase the pavement life of Cold Recycled Emulsified Asphalt Pavements (CREAP). A second benefit would be an additional opportunity to dispose of ground used tire rubber. A conventional mix design procedure was not acceptable for the control and test mixes due to the variables associated with the fine, dense RAP gradation, and the compatibility of the high float emulsion with the UUD and rubber. The mixture blend that was used for a control section included RAP with 2% HFE-150 plus 0.5% added mixing water. The test section included RAP with 1.5% HFE-150 plus 0.5% UUD, 1.8% fine ground tire rubber plus 1% added water. Approximately 280 tons of control mix and 280 tons of test mix were placed as an overlay. Several hours after being layed, the mixtures could not be compacted without hairline cracking. The mixtures were blanket rolled, dusted with #10-0 material and opened to traffic. After two days under traffic, it was determined that the control section was only partially successful and the test section had not set up. Shortly thereafter, the entire pavement overlay was removed.
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