Performance Studies and Future Directions for Mixes Containing RAP/RAS: Technical Report

Details

• Creators:
  Im, Soohyok ; Hu, Sheng ; Zhou, Fujie
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Reclaimed asphalt pavements
  • Recycled materials
  • Shingles
  • Hot mix asphalt
  • Mix design
  • Performance measurement
  • Field strength Recycled Asphalt
  • Shingles
  • Asphalt Mix Design
  • Field Performance
• Publication/ Report Number:
  0-6738
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Texas
• Edition:
  Technical Report
• Corporate Publisher:
  Texas A&M Transportation Institute
• Abstract:
  In the last several years reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) have been widely used in asphalt mixes in Texas. The use of RAP/RAS can significantly reduce the initial cost of asphalt mixtures, conserve energy, and protect the environment. There are always two main concerns: variability of RAP/RAS and durability (or cracking) of RAP/RAS mixes. Past studies in Texas have clearly indicated that both RAP and RAS have acceptable variability following the best practices for handling RAP/RAS. This study focused on the durability problems of RAP/RAS asphalt mixes. First, extensive laboratory tests were performed to investigate the impacts of RAP/RAS on the durability of RAP/RAS blended binders and asphalt mixes. Second, a field survey on test sections with RAP/RAS mixes was conducted to identify how significant RAP/RAS are and which approach to improve the durability problems of mixes. Third, a pavement life cycling cost analysis on RAP/RAS mixes was conducted to investigate the financial benefits of them. Finally, the findings, conclusions, and recommendations for RAP/RAS mixes are made.
• Format:
  PDF
• Funding:
  FHWA/TX-15/0-6738-2;0-6738-2
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/39811/dot_39811_DS1.pdf
• File Type:
  [PDF - 4.76 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d6bcdb8a833fe3ce3e62cb123f1c9b6b8df9c1f082da00472701d43992c6fbc00e083c640deb025e6cba1620d50fb2cfd1fcc8b433decd2dbefb58eed6e3d097