FlexMAT Rutting v2.1.1

FlexMAT™ for Rutting is an Excel-based analysis tool for characterizing rutting of asphalt pavement mixtures from AMPT test results. This includes analyzing the AMPT stress sweep rutting (SSR) test results (AASHTO TP134) to provide shift permanent deformation model coefficients to FlexPAVE™ rutting evaluation. The analysis also supports balanced mix design and production evaluation by calculating the Rutting Strain Index (RSI) parameter from the test data.

Additional information will be available in the TechBrief, Rutting Strain Index (RSI) Parameter for Asphalt Balanced Mixture Design. (FHWA-HRT-21-044).