Performance of Recycled Asphalt Shingles in Hot Mix Asphalt

State highway agencies are increasingly intersted in using recycled asphalt shingles (RAS) in hot mix asphalt (HMA) applications, yet many agencies share common questions about the effect of RAS on the performance of HMA. Previous research has allowed for only limited laboratory testing and field surveys. The complexity of RAS materials and lack of past experiences led to the creation of Transportation Pooled Fund (TPF) Program TPF-5(213). The primary goal of this study is to address research needs of state department of transportation (DOT) and environmental officials to determine the best practices for the use of recycled asphalt shingles in HMA applications. Agencies participating in the study include Missouri (lead state), California, Colorado, Illinois, Indiana, Iowa, Minnesota, Wisconsin, and the Federal Highway Administration. The agencies conducted demonstration projects that focused on evaluating different aspects (factors) of RAS that include RAS grind size, RAS percentage, RAS source (post-consumer versus post-manufactured), RAS in combination with warm mix asphalt (WMA) technology, RAS as a fiber replacement for stone matrix asphalt (SMA), and RAS in combination with ground tire rubber (GTR). Field mixes from each demonstration project were sampled for conducting the following tests: dynamic modulus, flow number, four-point beam fatigue, semi-circular bending, and binder extraction and recovery with subsequent binder characterization. Pavement condition surveys were then conducted for each project after completion. The demonstration projects showed that pavements using RAS alone or in combination with other cost saving technologies (e.g., WMA, RAP, GTR, SMA) can be successfully produced and meet state agency quality assurance requirements. The RAS mixes have very promising prospects since laboratory test results indicate good rutting and fatigue cracking resistance with low temperature cracking resistance similar to the mixes without RAS. The pavement condition of the mixes in the field after two years corroborated the laboratory test results. No signs of rutting, wheel path fatigue cracking, or thermal cracking were exhibited in the pavements. However, transverse reflective cracking from the underlying jointed concrete pavement was measured in the Missouri, Colorado, Iowa, Indiana, and Minnesota projects.

• Record URL:
  http://www.intrans.iastate.edu/research/documents/research-reports/ras_pooled_fund_w_cvr.pdf
• Record URL:
  https://spexternal.modot.mo.gov/sites/cm/CORDT/TPF5213_FinalReport.pdf
• 
• Corporate Authors:

  Iowa State University, Ames

  Institute for Transportation
  Ames, IA  United States  50010-8664

  Iowa Department of Transportation

  800 Lincoln Way
  Ames, IA  United States  50010

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Williams, R Christopher
  • Cascione, Andrew
  • Yu, Jianhua
  • Haugen, Debra
  • Marasteanu, Mihai
  • McGraw, Jim
• Publication Date: 2013-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 227p

Subject/Index Terms

• TRT Terms: Demonstration projects; Fatigue cracking; Hot mix asphalt; Laboratory tests; Pavement performance; Recycled materials; Reflection cracking; Rutting; Shingles; State departments of transportation; Transverse cracking
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01492444
• Record Type: Publication
• Report/Paper Numbers: TPF-5(213)
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Sep 9 2013 1:23PM