FIT-C: Composite Mastic Fatigue
(Fatigue at Intermediate Temperature for Composite Binder)
- Determines cracking resistance of asphalt mixture
- 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 RAP, RAS, REOB, PPA, and Polymers
- Automated testing process, which takes less than 30 minutes
Applications
- correlates with the ALF Passes to Failure (above)
- correlates with Mixture Fatigue (below graph)
- CB could be tested for fatigue in place of testing mixture
- Provides estimate of allowable traffic before cracking
Reference:
Azari, H., & Mohseni, A., 2019, “Unified Fatigue Tests for Asphalt Materials using incremental Repeated-Load Permanent Deformation (iRLPD) Methodology,” ASCE International Airfield and Highway Pavements Conference