Interlayer Mixture Design

Details

• Creators:
  Christensen, Donald W.
• Corporate Creators:
  Advanced Asphalt Technologies, LLC
• Corporate Contributors:
  Wisconsin Department of Transportation. Research and Library Unit ; Wisconsin Highway Research Program ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Asphalt Pavements CT Index Double Edge Notched Tension (DENT) Fatigue (Mechanics) Flexural Strength Interlayer Mixture Design Mix Design Modified Binders Modulus Pavement Interlayers Pavement Performance Specifications Testing

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• Publication/ Report Number:
  WHRP 0092-21-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wisconsin ; United States
• Edition:
  Final Report
• Corporate Publisher:
  Wisconsin. Dept. of Transportation. Research and Library Unit ; Wisconsin Highway Research Program
• Abstract:
  The purpose of this research was to develop a simple alternative to flexural fatigue testing for ensuring the fatigue performance of Interlayer Mixture Designs (IMOs) in Wisconsin. The research approach involved producing 15 different mixtures and characterizing these mixtures using the CT index as determined from the ideal CT test, and characterizing the binders used in the mixtures with a variety hosts related to fatigue performance. Using the data produced with these tests, statistical analyses were performed to develop an accurate and simple model that could serve as a basis for a revised, simpler IMO fatigue specification. The final proposed IMO fatigue specification requires a minimum CT index of 140 at 20°C, a maximum binder low temperature grade of -34°C, and a minimum elastic recovery that depends on the non-recoverable creep compliance as determined in AASHTO M 332. The proposed IMO fatigue specification requires no new binder tests and replaces flexural fatigue testing with the much simpler and less expensive IDEAL-CT. There should be no major barriers to implementation.
• Format:
  PDF
• Funding:
  WHRP 0092-21-04
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b980fe3a03b4a652d36cfbd6a7269371cf8337b80bdbee574f97c1b9b4ccde78
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/73326/dot_73326_DS1.pdf
• File Type:
  [PDF - 1.23 MB ]