Plastic coated aggregate Research Papers (original) (raw)

Generation of plastic waste and rubber waste is increasing day by day and the necessity to dispose of this waste in a proper way is arising. Nowadays pavements are subjected to various kinds of loading which affects the pavement performance condition that causes various distresses. Use of plastic and rubber in pavement design as an innovative technology not only strengthened the road construction but also increase the road life. In this study, different tests were conducted on aggregates, bitumen, and bituminous mixes. The effect of the addition of waste polyethylene in the form of locally available carry bags had been checked on aggregates as well as on bitumen. As per visual inspection, 5%, 7.5% and 10% plastic coating was made on aggregates and sample were checked for crushing, impact and abrasion values. Effect of addition of waste plastic and crumb rubber on bitumen had been studied by varying concentrations of polyethylene from 0% to 15% i.e. 0%, 5%, 7.5%, 10%, 12.5% and 15% in bitumen. Various tests such as penetration, ductility, softening point, flash and fire point, viscosity and loss on heating were performed on the samples. The optimum percentage was taken from these tests which had shown satisfactory results for all the tests performed. Later, that optimum percentage value was used for preparing bituminous mixes for testing pavement properties such as Marshall Stability, compressive strength, and indirect tensile strength. As per the test results, about 10% plastic waste with crumb rubber replacement in bitumen shows better results than conventional bitumen as well as 10% plastic coating to aggregates also improve the load-bearing capacity. The strength is found to be increased by 62% as compared to conventional mixes. By using plastic waste in flexible pavement design, the problem of plastic and waste rubber disposal gets solved as well as the performance of roads gets improved. Investigations can also be made on using other grades of bitumen and other substituents. Generation of plastic waste and rubber waste is increasing day by day and the necessity to dispose of this waste in a proper way is arising. Nowadays pavements are subjected to various kinds of loading which affects the pavement performance condition that causes various distresses. Use of plastic and rubber in pavement design as an innovative technology not only strengthened the road construction but also increase the road life. In this study, different tests were conducted on aggregates, bitumen, and bituminous mixes. The effect of the addition of waste polyethylene in the form of locally available carry bags had been checked on aggregates as well as on bitumen. As per visual inspection, 5%, 7.5% and 10% plastic coating was made on aggregates and sample were checked for crushing, impact and abrasion values. Effect of addition of waste plastic and crumb rubber on bitumen had been studied by varying concentrations of polyethylene from 0% to 15% i.e. 0%, 5%, 7.5%, 10%, 12.5% and 15% in bitumen. Various tests such as penetration, ductility, softening point, flash and fire point, viscosity and loss on heating were performed on the samples. The optimum percentage was taken from these tests which had shown satisfactory results for all the tests performed. Later, that optimum percentage value was used for preparing bituminous mixes for testing pavement properties such as Marshall Stability, compressive strength, and indirect tensile strength. As per the test results, about 10% plastic waste with crumb rubber replacement in bitumen shows better results than conventional bitumen as well as 10% plastic coating to aggregates also improve the load-bearing capacity. The strength is found to be increased by 62% as compared to conventional mixes. By using plastic waste in flexible pavement design, the problem of plastic and waste rubber disposal gets solved as well as the performance of roads gets improved. Investigations can also be made on using other grades of bitumen and other substituents.