Investigation of the Effects of Long-Term Aging and Testing Temperature Sensitivity on the Flexibility Index (FI) Parameter Obtained from the Illinois Flexibility Index Test (I-FIT)

Fatigue cracking, occurring at intermediate temperature, is the most prevalent mode of cracking in asphalt pavements. Due to recent significant progress in laboratory characterization of asphalt mixtures, testing notched specimens such as the one required by Illinois Flexibility Index Test (I-FIT) have shown promising to characterize intermediate cracking resistance of asphalt mixtures. I-FIT as per AASHTO TP124 standard was developed to assist …