Experimental Investigation of Crumb Rubber in Bituminous Mix

The growth rate of vehicles is the backbone of economic development of any country. India is the second fast growing automobile industry in the world. In today’s era solid waste management is the thrust area. It is estimated that 60% waste tyre are disposed in different routes in the urban as well as rural area. Waste tyre are categorized as solid or hazardous waste this leads to create various problems on human beings as well as aquatic life. Due to its burning and dumping the tyre in sea shore. On the other side, the traffic intensity is also increasing. As a result amount of waste tyre is also increasing. The increase in consumption of waste tyre has generated many problems such as increase in landfill space, environmental pollution and causing health hazards. Parallel to this is the increasing of roads construction as a result of heavy traffic on road. This study reviews to use the crumb rubber (waste tyres in powder form) in bitumen. The study focuses on the crumb rubber as a replacement to the total weight of bitumen. The design or life span for all highways and urban roads is 10-20 years. Unfortunately, damages distresses on pavements are still occurring before reaching the maximum period of the design serviceability. Among the major influencing factor that is contributing to the distress is the repeated heavy traffic loading on the road surfaces. Moreover, the use of waste crumb rubber in road construction as a pavement surface as a better skid resistance, fatigue crack resistance and increases rut resistance. The review includes physical test that are used to determine the physical properties of bitumen and modified crumb rubber mix. The physical tests involves penetration test, ductility test, softening point test, specific gravity. The expectations from the study are to develop bitumen with waste crumb rubber that would minimize the cost as well waste rubber up to some extent. And providing better physical properties compare to the convention bitumen based on the tests that was conducted.