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I-FIT : Illinois-Flexibility Index Tester

The Troxler I-FIT (Illinois - Flexibility Index Tester) machine to evaluate the cracking potential of asphalt mixtures. 
In this study, two cracking indices were compared: the flexibility index (FI) and the cracking resistance index (CRI), both derived from the load-displacement curve. The applicability of quality assurance (QA) tests of laboratory-compacted and field-compacted samples also was explored to evaluate cracking potential, and I-FIT was investigated for its applicability as a performance-related quality control (QC)/QA test.


Standard: AASHTO TP105