Recycled Asphalt Shingles (RAS) as a Full Depth Reclamation (FDR) Mechanical Stabilizer

Details

• Creators:
  Dave, Eshan V. ; Sias, Jo E. ; Bisanti, Fausto ; Tebaldi, Gabriele
• Corporate Creators:
  University of New Hampshire. Dept. of Civil Engineering
• Corporate Contributors:
  Vermont Agency of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Recycled materials
  • Asphalt based materials
  • Full-depth reclamation
  • Mechanical stability
  • Pavement performance
  • Life cycle costing
  • Life cycle analysis
  • Laboratory tests
  • Service life
  • Environmental impacts
  More +
• Publication/ Report Number:
  2026-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report: 2023-2026
• Corporate Publisher:
  University of New Hampshire. Department of Civil and Environmental Engineering
• Description:
  This research investigated the use of recycled asphalt shingles (RAS) as a mechanical stabilizer in full depth reclamation (FDR)pavement rehabilitation. The study aimed to determine whether processed and minimally processed RAS could serve as sustainable alternatives to conventional stabilizers while diverting roofing waste from landfills. Laboratory testing was conducted on FDR materials from two reference projects (Marshfield-Danville and Cambridge-Johnson), blended with 5% and 10% RAS. Mechanical evaluations included indirect tensile strength, triaxial resilient modulus, and triaxial shear strength, while pavement performance was predicted using MnPAVE modeling. Results showed that the incorporation of 5% RAS, particularly minimally processed, maintained acceptable mechanical properties and service life, whereas higher contents reduced strength and stiffness. Processed RAS led to higher air voids, negatively affecting mixture performance, while minimally processed RAS improved cohesion and internal friction. Economic and environmental assessments, including life-cycle cost analysis (LCCA) and life-cycle assessment (LCA), indicated that 5% RAS is feasible when transport distances are similar to conventional aggregates and service life is not compromised. Field implementation and long-term monitoring are recommended to validate laboratory findings and optimize RAS use in practice.
• Format:
  PDF
• Funding:
  GR1850
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/94031/dot_94031_DS1.pdf
• File Type:
  [PDF - 14.56 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a320704804cc93454fbc41a7907a99350706ec178ba1626cb71dc6f61d3e95f1eccae7dbeef169c03b0bfcb97cf6eed934a60b4cf0deca1de29a1a327e208074