CTDOT Specification Requirements for Minimum Asphalt Requirements

Details

• Creators:
  Zinke, Scott ; Mahoney, James
• Corporate Creators:
  University of Connecticut. Connecticut Transportation Institute ; Connecticut Advanced Pavement Laboratory
• Corporate Contributors:
  Connecticut. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Aggregate gradation
  • Asphalt content
  • Asphalt mixtures
  • Asphalt pavements
  • Asphalt tests
  • Pavement performance
  • Performance based specifications
  • Performance tests
• Publication/ Report Number:
  CT-2286-F-18-5
• Resource Type:
  Tech Report
• Geographical Coverage:
  Connecticut ; United States
• Edition:
  Final Report, January 24, 2014 – June 30, 2015
• Corporate Publisher:
  Connecticut. Department of Transportation
• Abstract:
  CTDOT minimum asphalt requirements have resulted in roadway mixes being produced with finer aggregate gradations in recent years than they have in the past. This research was conducted to investigate the possibility of lowering the minimum asphalt content requirements in an effort to drive the mix gradations coarser without compromising the performance quality of the mix. CTDOT Superpave mixes were collected from multiple HMA production facilities during production. Constituent aggregates for each of the mixes were also collected. Rutting susceptibility testing, moisture susceptibility testing along with fatigue and reflective cracking damage susceptibility testing w ere performed on the collected mixes. The aggregates were then recombined at lowered asphalt contents to produce specimens that were subjected to the same performance tests as the original mix for comparison. Performance test results indicate that the current CTDOT minimum asphalt content requirements are optimized and there are no recommendations to change the specifications as a result of this research.
• Format:
  PDF
• Funding:
  SPR-2286
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/59898/dot_59898_DS1.pdf
• File Type:
  [PDF - 10.21 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a47d903a2b2f8727a2d12b8069ae81aad59f59da672a67006e6596554aeaacc8