Evaluation of Fatigue Potential for Crumb Rubber Modified Bitumen in Stone Mastic Asphalt Mixes

SMA is a gap graded mix composed of high concentration coarse aggregate that held together in thick asphalt film by matrix mineral filler and stabilizers. Since natural aggregates have become expensive, hence Reclaimed Asphalt Pavement (RAP) can be reused pavement construction to reduce the environmental hazardous due disposal problems. RAP contains used aggregates, it highly prone fatigue, thermal reflective cracking effect. Rheological chemical properties aged bitumen enhanced use untreated waste oils such as engine oil rejuvenators. This research presents study on fatigue performance with materials without rejuvenators results were compared conventional mix. The first characterized common laboratory tests. Then three mixes are tested using several test procedures: Marshall Stability, indirect tensile strength, moisture susceptibility, tension test. optimum proportions highest stability selected from strength show replaced showed higher ratio resistance damage when replacement was conducted for at different temperature stresses. lower stresses, rejuvenator offered better than those At temperatures, similar lifecycle However, lifecycle. Increase failure stresses resulted decrease number cycles increased initial strain Thus, substantial cost achieved compromising characteristic