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Evaluation of Engineering Properties of Plastic Modified Bitumen
Objectives: To make an efficient utilization of waste plastics for pavement construction stronger, economical and ecofriendly. Methods/Statistical Analysis: Comparative experimentations are carried out on three sets of samples: pure bitumen&modified bitumen, conventional mix& modified bituminous mix and uncoated aggregates&plastic coated aggregates. Modified bitumen is prepared by mixing powder ground plastic (10% by weight of bitumen) in pure bitumen. Dry mix process is employed to prepare plastic coated aggregates and modified bituminous mix. Findings: The experimentations result showed that the modification of conventional bitumen with waste plastic shows positive margin in all the tests carried out except ductility test. The conventional roads are constructed using bitumen, which is not only expensive but also have some pre and post constructional problems like rutting, potholes, stripping out of aggregates, etc. This work justified the utilisation of waste plastic as a partial substitute of bitumen in which the extent of replacement of bitumen with waste plastic is 10% by weight of bitumen. Waste plastic not only reduces the cost but also improves constructional features such as reduced rutting as it increases the softening point and reduces cracking and pothole as loss on heating of modified bitumen is less. Application/Improvements: In binding and surface courses of pavement bitumen can be successfully replaced with 10% of waste plastic to impart greater strength and durability to the pavement.
Bitumen, Conventional Mix, Modified Mix, Pavement, Waste Plastic.
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