Composition Based Physicochemical Analysis of Modified Bitumen by High-density polyethylene (HDPE) and Low-density polyethylene (LDPE)

The innovative use of polythene for bitumen modification to enhance the quality of bitumen is at the peak of research area of scientists working in the field of environmental sustainability. On the one hand, this method utilizes a large amount of non-biodegradable waste in an eco-friendly way and is an integral component of plastic waste management while on the other hand, it enhances the properties of bitumen. In our research we have used low density polythene (LDPE) and high density polythene (HDPE) in the form of pellets for modification of VG-30 bitumen. Different compositions of LDPE and HDPE modified bitumen (1%, 3%, 5% and 7% by weight of bitumen) were synthesized. Various physical, mechanical and structural properties of modified bitumen were studied and compared with that of neat bitumen using penetration test, softening point test, ductility test, separation tests, FTIR analysis, SEM etc. The results of research proved that there is enhancement in properties of bitumen after modification with LDPE and HDPE. Modified bitumen has reduced thermal susceptibility, more resistance towards permanent deformation and better storage stability. The best improvements were obtained at the 5% composition in case of LDPE and 3% in case of HDPE.