EFFECT OF THE USE OF CRUMB RUBBER IN CONVENTIONAL BITUMEN ON THE MARSHALL STABILITY VALUE

In today’s era, solid waste management is the thrus t area. Out of this various waste materials, plasti c waste, tyre waste and municipal solid waste are of great concern. On the other side , the road traffic is increasing. The traffic intensity isalso increasing. The load bearing capacities of the road are to be increased. Our present work is helping to take care of both t hese aspects.Plastic waste, consisting of carry bags, cups, thermocoles, etc. c an be used as a coating over aggregate and this coa ted stone can be used for road construction. Secondly the waste tires are powdered and the powder is blended with bitumen and this bl end is used along with plastic coated aggregate. The mix polymer coated aggregate and tyre modified bitumen have shown higher strengt h. Use of this mix for road construction helps to use both plastics waste and twaste.Stone aggregate is coated with the molten waste plastics. The coating of plastics reduces the porosity, absorption of moistu re and improves soundness.The polymer coated aggreg ate bitumen mix forms better material for flexible pavement construction as the mix shows higher Marshall Stability value and suita ble Marshall Coefficient. Moreover the polymer coated aggregate helps to use Crumb rubber modified bitumen resulting in better r esult. Moreover the polymer coated aggregate helps to use Crumb rubber modified bitumen resulting in better result.Crumb Rubber Mo dified Bitumen (CRMB) is hydrocarbon binder obtained through physical and ch emical interaction of crumb rubber (produced by rec ycling of used tires) with bitumen and some specific additives. The Flextal ra nge of CRMB offers binders which are stable and eas y to handle with enhanced performances.( www.total.co.in)[1]