iRLPD Fatigue For Mixture
(incremental Repeated Load Permanent Deformation)

  • Test provides fatigue index, which is the measure of resistance of the mixture to cracking at intermediate temperature
  • Test is performed at sweeps of stresses and temperatures
  • The duration of the test is 30 min. /temperature
  • Fatigue index of ALF mixtures are well correlated with number of passes to first crack in ALF lanes.


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

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