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

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.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 124p

Subject/Index Terms

Filing Info

  • Accession Number: 01594073
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-15/0-6738-2, 0-6738-2
  • Contract Numbers: 0-6738
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Mar 8 2016 12:09PM