COMPARATIVE ANALYSIS OF COVENTIONAL AND NITRILE BUTADIENE RUBBER MODIFIED BITUMINIOUS MIX

High vehicular traffic and various climatic conditions brings damage to bituminous pavements design with conventional bituminous materials. To tackle the adverse deterioration of pavement, best coherent method is alteration of bitumen by including various polymers to enhance its properties to withstand or overcome various climatic situations and resistance against vehicular traffic . various waste polymers from different sources comes with different set of modification properties. Modification with using polymer waste also have an positive effect in maintaining environmental balance. Various bitumen and bituminous mix test determines properties of modified bitumen which enables us to know more about bitumen deportment under various thermal and mechanical state. Here Nitrile butadiene rubber (waste of sole of shoes) in powdered from is being used to modify bitumen and compared to properties of bitumen of viscosity grade 40, also test on bituminous mix with conventional and modified form were conducted. Results show that NBR waste influences bitumen properties with decrease in penetration and increase in softening point as compared to conventional bitumen used as VG40. Also mechanical resistance of NBR was better than conventional bitumen with better Marshall stability and flow value .