Evaluating Effective Asphalt Content in CIR Mixtures

Details

• Creators:
  Wegman, Daniel E. ; Sabouri, Mohammadreza
• Corporate Creators:
  Braun Intertec
• Corporate Contributors:
  Minnesota. Department of Transportation. Local Road Research Board
• Subject/TRT Terms:
  • Asphalt content
  • Asphalt emulsions
  • Cold in-place recycling
  • Compaction
  • Laboratory tests
  • Mix design
  • Reclaimed asphalt pavements
  • Temperature
  • Emulsions
  • Performance tests
• Publication/ Report Number:
  MN/RC 2019-43
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final report
• Corporate Publisher:
  Minnesota. Department of Transportation
• Abstract:
  In this study, to evaluate the effect of emulsion reduction during the cold in-place recycling (CIR) process in the field, three laboratory CIR mix designs were performed using the same reclaimed asphalt pavement (RAP) material and emulsion at three different mixing temperatures. The mix design results showed that as the mixing temperature increased, the optimum emulsion content decreased significantly. Also, increasing the mixing temperature improved the mixture compaction. Both the dry and retained stabilities were also higher for the high-temperature mixtures. The critical low temperatures of high-temperature mixtures were higher than the room-temperature mixture (indicative of a worse performance) but still lower than -20°C. From the results of this study, it appears that reducing the emulsion content of the CIR mixtures during the heat of the day, does not necessarily deteriorate the mixture properties. This could result in substantial savings for agencies that use this process without sacrificing long-term performance.
• Format:
  PDF
• Funding:
  (c)1032115
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/53981/dot_53981_DS1.pdf
• File Type:
  [PDF - 2.66 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b92e7e5057eb463129f836f5cc765bedc90fb1f1df0207a3bd8fbca50da3ed6c