July 21, 2008 - ...plastics, which causes a large environmental concern, a study conducted by KRL officials said.The study revealed that up to 3 per cent of waste plastics could be added to the bitumen and beyond this level, the waste plastics tend to separate. Experiments at KR also revealed that separation of plastics takes place on re-heating the waste plastic bitumen blends prior to laying, hence KR had suggested ‘onsite’ mixing of waste plastics along with the...