Performance Evaluation of Crumb Rubber Modified Bitumen on Binder Course of Stone Mastic Asphalt Mix

Utilization of crumb rubber modified bitumen for wearing course in stone mastic asphalt mix pavement has been widely researched by many researchers due to its enormous benefits. This present paper focuses on the performance of binder course in stone mastic asphalt mixes using Crumb Rubber Modified Bitumen (CRMB) as a binder at five different levels, namely 5.7%, 6%, 6.3%, 6.6% and 6.9% respectively by weight of bituminous mixes. The optimal of crumb rubber modified bitumen was identified by carrying out Marshall stability test, Indirect tensile strength, fatigue and Rutting test. Based on the results obtained, it was observed 6.3% of crumb rubber modified bitumen improves the performance of binder course in stone mastic asphalt mix.