Development of Quality Standards for Inclusion of High Recycled Asphalt Pavement Content in Asphalt Mixtures – Phase Ⅳ [Tech Brief]

Details

• Creators:
  Lee, Hosin David ; Williams, Chris
• Corporate Creators:
  University of Iowa. Iowa Technology Institute
• Corporate Contributors:
  Iowa Highway Research Board ; Iowa. Department of Transportation
• Subject/TRT Terms:
  Asphalt Mixtures Asphalt Pavements Mix Design Quality Control Recycled Materials Rejuvenators Standards Warm Mix Paving Mixtures
• Publication/ Report Number:
  TR 770
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Edition:
  Tech Brief
• Corporate Publisher:
  Iowa Department of Transportation
• Abstract:
  Public highway agencies encourage the use of recycled asphalt materials (RAM) in constructing pavements to the maximum extent possible with an equal performance. Low temperature cracking potential is a primary concern with high RAM mixtures, which is caused by the aging of asphalt through the oxidation. To minimize a low temperature cracking, various rejuvenators have been utilized in the past instead of bumping down a PG grade of the specified virgin asphalt for high RAM mixes. Although the current Iowa DOT’s specification allows RAP materials up to 30% with softer binder, limited construction projects have been performed, which utilized more than 20% RAP materials.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:1cccc3f4fbdd28c2c3294bd13b8f0d27d85869f759230203a3a6df11c026d675988a54ebd5ba5b3027a5168ff845496d872ef84288500eda947849b112e5d722
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/79644/dot_79644_DS1.pdf
• File Type:
  [PDF - 282.48 KB ]