Development of non-petroleum-based binders for use in flexible pavements - phase II.

Details

• Creators:
  Williams, R. Christopher ; Peralta, Joana ; Puga, Ka Lai Ng
• Corporate Creators:
  Iowa State University. Institute for Transportation
• Corporate Contributors:
  Iowa. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt pavements
  • Flexible pavements
  • Bituminous binders
  • Binder content
  • Evaluation
  • Laboratory tests
  • Rubber
  • Performance tests
  • Cracking
  • Rutting
  More +
• Publication/ Report Number:
  IHRB Project TR-650 ; InTrans Project 12-447
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Institute for Transportation
• Abstract:
  Bio-binders can be utilized as asphalt modifiers, extenders, and replacements for conventional asphalt in bituminous binders. ; From the rheology results of Phase I of this project, it was found that the bio-binders tested had good performance, similar to ; conventional asphalt, except at low temperatures. Phase II of this project addresses this shortcoming and evaluates the Superpave ; performance of laboratory mixes produced with the enhanced bio-binders. ; The main objective of this research was to develop a bio-binder capable of replacing conventional asphalt in flexible pavements ; by incorporating ground tire rubber (GTR) into bio-oil derived from fast pyrolysis of agriculture and forestry residues. The ; chemical compatibility of the new bio-binder with GTR was assessed, and the low-temperature performance of the bio-binders ; was enhanced by the use of GTR. ; The newly developed binder, which consisted of 80 percent conventional binder and 20 percent rubber-modified bio-oil (85 ; percent bio-oil with 15 percent GTR), was used to produce mixes at two different air void contents, 4 and 7 percent. The ; laboratory performance test results showed that the performance of the newly developed bio-binder mixes is as good as or better ; than conventional asphalt mixes for fatigue cracking, rutting resistance, moisture sensitivity, and low-temperature cracking. ; These results need to be validated in field projects in order to demonstrate adequate performance for this innovative and ; sustainable technology for flexible pavements.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29595/dot_29595_DS1.pdf
• File Type:
  [PDF - 2.48 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:42ae0e5c2f9bf91df49048e8caa4795ba3184badbdce6ed2d0386547572be2f6