Minimum virgin binder limits in recycled superpave mixes in Kansas : final report.

Details

• Creators:
  Tavakol, Masoumeh ; Hossain, Mustaque
• Corporate Creators:
  Kansas State University. Transportation Center ; Kansas State University. Department of Civil Engineering
• Corporate Contributors:
  Kansas. Dept. of Transportation. Bureau of Research
• Subject/TRT Terms:
  • Binder content
  • Cracking
  • Hot mix asphalt
  • Mix design
  • Moisture content
  • Pavement performance
  • Recycled materials
  • Rutting
  • Shingles
  • Superpave
  More +
• Publication/ Report Number:
  K-TRAN: KSU-13-5
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Kansas
• Edition:
  Final Report, July 2012-June 2016
• Corporate Publisher:
  Kansas. Dept. of Transportation
• Abstract:
  Use of recycled materials in asphalt pavement has become widespread recently due to rising costs of virgin ; binder and increased attention to sustainability. Historically, recycled asphalt pavement (RAP) has been the most ; commonly used recycled material for hot-mix asphalt (HMA). However, recycled asphalt shingle (RAS), another ; recycled material, has recently become popular. Although there are some guidelines regarding use of RAP and RAS in ; HMA, their effects on mixture performance, especially on mixtures containing RAS, are not thoroughly understood. ; In this research, three recycled Superpave (SR) mixture designs from the Kansas Department of Transportation ; (KDOT) with 9.5-mm (SR-9.5A) and 19-mm (SR-19A) nominal maximum aggregate size (NMAS) were selected as ; control mixtures. Mixtures containing higher percentages of recycled materials (RAP and RAS) were developed using ; KDOT blending charts. A total of nine mixtures with varying virgin binder contents were designed and assessed for ; moisture susceptibility, rutting resistance, and fatigue cracking propensity using modified Lottman, Hamburg Wheel ; Tracking Device, flow number, Dynamic Modulus, and S-VECD direct tension fatigue tests. ; Results confirmed the effect of NMAS and material source on mixture performance. For SR-9.5A, the ; mixtures showed increased susceptibility to moisture and rutting damage below virgin binder content of 75%. For SR- ; 19A, mixtures with virgin binder content of 70% showed satisfactory performance properties. Mixtures with virgin ; binder contents lower than 60% definitely showed inferior performance.
  More +
• Format:
  PDF
• Funding:
  C1937
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30910/dot_30910_DS1.pdf
• File Type:
  [PDF - 3.43 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:d50208e1b1d29583c0314bb386a4b1f438fe9a9e93ffef749974b2fbadd6ea57