24-10-2014, 12:13 PM
Abstracts: The generation of waste plastics is increasing day by day. The major polymers namely polyethylene, polypropylene, polystyrene show adhesion property in their molten state. Stone aggregate is coated with the molten waste plastics. The coating of plastics reduces the porosity, absorption of moisture and improves soundness. The polymer coated aggregate bitumen mix forms better material for flexible pavement construction as the mix shows higher Marshall Stability value and suitable Marshall Coefficient. Hence the use of waste plastics for flexible pavement is one of the best methods for easy disposal of waste plastics. The use of polymer coated aggregate is better than the use of polymer modified bitumen in many respects. Moreover the polymer coated aggregate helps to use Crumb rubber modified bitumen resulting in better result. In India more than 3.3 million km of road is available. If they are constructed as plastic tar road, there will be less waste plastic available on the road. The process is eco friendly.