Use of Recycled Asphalt Shingles in HMA

In the last several years, both reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) have been widely used in paving Texas highways. Compared to RAP, RAS has two features: 1) much higher asphalt binder content, and 2) super stiff asphalt binder. Thus, the use of RAS can not only reduce the cost of asphalt mix paving significantly, but it also conserves energy and protects the environment. However, the super high stiffness of RAS binder causes strong concern on durability (or cracking performance) of asphalt mixes containing RAS. Another concern was the variability of processed RAS due to different RAS sources varying from manufacture waste shingles to a wide variety of tear-off shingles. To address these two major concerns (variability and durability), in 2010, the Texas Department of Transportation (TxDOT) initiated this research study at the Texas A&M Transportation Institute with objectives to: (1) Define variability of processed RAS. (2) Develop best practices for RAS processing and stockpile management. (3) Evaluate methods of improving cracking performance of RAS mixes in the laboratory. (4) Construct field test sections to validate laboratory test results.

• Record URL:
  http://tti.tamu.edu/documents/0-6614-S.pdf
• Summary URL:
  http://tti.tamu.edu/publications/catalog/record/?id=36160
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/40547
• Corporate Authors:

  Texas A&M Transportation Institute

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Zhou, Fujie
  • Li, Hongsheng
  • Im, Soohyok
  • Hu, Sheng
  • Button, Joe
  • Epps, Jon
  • Scullion, Tom
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Project Summary
• Features: Figures;
• Pagination: 2p

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Best practices; Durability; Field tests; Hot mix asphalt; Laboratory tests; Mix design; Pavement cracking; Recycled materials; Shingles
• Geographic Terms: Texas
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01526360
• Record Type: Publication
• Report/Paper Numbers: 0-6614
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: May 28 2014 3:26PM