Rutting performance of rubberized porous asphalt using Finite Element Method (FEM)

• Finite Element Method was employed to estimate rut depth of rubberized porous asphalt using static and repeated loading.
• Parameters of creep power law were determined using dynamic creep test.
• From 10% to 20%, crumb rubber reduced the rut depth regarding both loading simulation.
• Static loading resulted in slightly greater rut depth.

The aim of this study is to investigate impact of crumb rubber on rut depth reduction. Dynamic creep and indirect resilient modulus tests were performed on control porous mix as well as rubberized mixtures containing modified binder content at concentrations of 10%, 15%, and 20%. Results of dynamic creep test were used to calibrate parameters of creep power law and resilient modulus (MR) was assigned to pavement layers. By conducting static and repeated loading in ABAQUS, it is found that static loading results in slightly greater rut depth than repeated one. Moreover, results show that 10%, 15%, and 20% rubber content causes rut depth reduction of 41%, 56%, and 61% with regard to static loading and 40%, 55%, and 60% regarding repeated loading, respectively.