Beneficial Reuse of Reclaimed Asphalt Pavement in Geotechnical Infrastructure

Details

• Creators:
  Hubler, Jonathan ; Sample-Lord, Kristin ; Dager, Catherine
• Corporate Creators:
  Villanova University
• Corporate Contributors:
  Pennsylvania. Department of Transportation. Bureau of Planning and Research ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Aggregate Mixtures Creep Fills Geotechnical Engineering Reclaimed Asphalt Pavements
• Publication/ Report Number:
  FHWA-PA-2023-001-VU WO 002
• Resource Type:
  Tech Report
• Geographical Coverage:
  Pennsylvania ; United States
• Edition:
  Final Report (5/3/21 – 1/3/23)
• Corporate Publisher:
  Pennsylvania. Department of Transportation. Bureau of Planning and Research
• Abstract:
  Reclaimed Asphalt Pavement (RAP) has been extensively studied for potential use as a recycled material in infrastructure construction. There is consensus that utilization of RAP provides environmental and economic benefits for most projects. However, impacts to engineering performance are less known, due to the highly variable nature of RAP sources with different asphalt pavement mixtures and milling processes, which has limited the adoption of RAP as fill material in geotechnical infrastructure. This study conducted a comprehensive review of geotechnical properties reported for RAP in the experimental literature. Additionally, experimental testing was conducted on six sources of RAP from Pennsylvania’s District 6 to determine the geotechnical properties and to identify potential reuse opportunities. The gradation, specific gravity, density, moisture content, hydraulic conductivity, leaching, shear strength, and creep properties of different RAP sources from literature and District 6 were summarized and compared. These geotechnical properties, as well as recent investigations into the effects of temperature and aggregate mixing, were used to identify the potential reuse of RAP in highway transportation applications beyond just asphalt mixture design, such as embankments or fill, shoulder backfill, pipe bedding, and reinforced fill for MSE walls. Additionally, a correlation between the coefficient of uniformity and the geotechnical properties of maximum dry density and saturated hydraulic conductivity was identified.
• Format:
  PDF
• Funding:
  4400022549/512001
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a2530b9dfdc54a3b926774cf0f431ca0a267df41c844ae45df21fcc5f7ecc4c3
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/68715/dot_68715_DS1.pdf
• File Type:
  [PDF - 6.67 MB ]