Mechanistic performance evaluation of pavement sections containing RAP and WMA additives in Manitoba

Over recent decades, the utilization of reclaimed asphalt pavement (RAP) and warm mix asphalt (WMA) in mixtures has increased dramatically due to the environmental and economic advantages of these materials. This paper presents the fatigue and rutting characterization of mixtures that contain RAP and/or WMA obtained from Manitoba in Canada. In addition to mechanical testing, numerical simulations of the fatigue cracking and rutting performance of the pavement sections were performed, and the results were compared to field observations. The results obtained from the Layered Viscoelastic pavement analysis for Critical Distresses (LVECD) program and from the field measurements show good agreement, thereby indicating that the LVECD program is able to predict reasonable pavement performance for the RAP and WMA mixtures. The field performance and the predicted performance were used to evaluate the effects of RAP and/or WMA additives on the fatigue cracking and rutting performance of the mixtures.