FIT-B: Binder Fatigue Test
(Fatigue at Intermediate Temperature for Binder)

  • Determines cracking resistance of asphalt binder
  • Conducted using Temperature Sweep and Pulse Load
  • Provides two parameters at the same time: Intermediate Temperature (IT) and fatigue index (FI)
  • Can determine effects of REOB, PPA, and Polymers
  • Provides reliable estimates of Elastic Recovery (ER)
  • ALF Extracted binder correlated to Passes to Failure
  • Determines effect of REOB (see above graph)
  • Determines effect of modification on performance
  • Differentiates type of modification (SBS vs. PPA)
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