Evaluation Of New Binders Using Newly Developed Fracture Energy Test

This study evaluated a total of seven asphalt binders with various additives using the newly developed binder fracture energy test. The researchers prepared and tested PAV-aged and RTFO-plus-PAV-aged specimens. This study confirmed previous research findings that fracture energy is unaffected by loading rates. This research outlines the characteristics of true stress-true strain curves for asphalt binders with various additives. The results indicate that SBS polymer-modified asphalt binder exhibits a true stress-true strain curve with a distinct second stress peak at all loading rates, and has high fracture energy. Four binders exhibited comparable fracture energy with and without RTFO testing, while the fracture energy of other three increased significantly after RTFO testing. Limited information is available regarding the additives in the tested binders and their relative contents; however, the BFE test appears to clearly identify the presence of SBS polymer modifier and rank the cracking resistance of tested binders in terms of fracture energy. The BFE test successfully identified three binders which failed to meet the Superpave PG 76-22 grading requirements and clearly distinguished between the remaining four qualified binders.

Language

  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 47p

Subject/Index Terms

Filing Info

  • Accession Number: 01491458
  • Record Type: Publication
  • Report/Paper Numbers: UF Project No.: 00106022
  • Contract Numbers: BDK75 977-75
  • Files: TRIS, ATRI, STATEDOT
  • Created Date: Aug 21 2013 3:24PM