Asphalt Binder Extraction Protocol for Determining Amount & PG Characteristics of Binders

This research project evaluated test procedures to quantify the amount of binder in asphalt mixtures. Although there are different well established American Association of State Highway and Transportation Officials (AASHTO) procedures to determine the asphalt content of an asphalt mix, the accuracy of these test procedures may be sensitive to local materials. In addition, as the use of high recycled binder content mixes increases, there is a need to evaluate the within-lab and between-lab variability. A second goal for this project was to evaluate the variability of the Performance Grade (PG) properties of the extracted binder after recovery. The experimental plan included the evaluation of AASHTO T 164 Method A (centrifuge extraction) and Method B (reflux extraction), asphalt analyzer and AASHTO T 308 - ignition test. To accomplish this, several laboratories from Wisconsin along with the National Center for Asphalt Technology (NCAT) lab participated in the study. A total of eight mixes that included virgin mixes and mixes with various contents of recycled binder were evaluated to quantify the variability in the determination of their asphalt content. Two sources of recycled asphalt pavement (RAP) and one source of recycled asphalt shingles (RAS) were also evaluated. Within-lab and between-lab variability for each test procedure were developed for Wisconsin materials and compared to the current AASHTO standards. Recommendations were provided to revise and adjust current Wisconsin Department of Transportation (WisDOT) job mix formula (JMF) tolerance for asphalt content specification when these test procedures are used. In addition, PG characteristics of the recovered asphalt binders were also assessed.

• Record URL:
  http://wisconsindot.gov/documents2/research/0092-16-02-final-report.pdf
• 
• Summary URL:
  http://wisconsindot.gov/documents2/research/0092-16-02-research-brief.pdf
• Corporate Authors:

  National Center for Asphalt Technology

  Auburn University, 277 Technology Parkway
  Auburn, AL  United States  36830

  Wisconsin Department of Transportation

  Division of Business Management, Research and Library Unit
  4802 Sheboygan Avenue
  Madison, WI  United States  53707

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Rodezno, Carolina
  • Julian, Grant
• Publication Date: 2018-1

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 85p

Subject/Index Terms

• TRT Terms: Asphalt content; Asphalt mixtures; Bituminous binders; Reclaimed asphalt pavements; Shingles; Specifications; Test procedures
• Identifier Terms: AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing; AASHTO T 164; AASHTO T 308
• Uncontrolled Terms: Asphalt extraction; Ignition test; Performance grade; Testing variability
• Geographic Terms: Wisconsin
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01670512
• Record Type: Publication
• Report/Paper Numbers: WHRP 0092-16-02
• Contract Numbers: WHRP 0092-16-02
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: May 29 2018 11:05AM