Use of waste polyethylene for modification of bituminous paving mixes containing recycled concrete aggregates

摘要

Recycling or waste utilisation in transportation construction industry is important for sustainability. Keeping this in mind, an attempt has been made in this study to explore the use of waste materials such as recycled concrete aggregates (RCA) and waste milk packaging polyethylene in bituminous paving mixes. In this study, dense bituminous macadam mixes were prepared with RCA as coarse aggregates and two different types of filler, i.e. cement and stone dust. For the purpose of comparison, paving mixes were also prepared using natural aggregate and other materials as above. It was observed that all the mixtures prepared with various combinations satisfy the requirements in terms of Marshall test parameters and moisture susceptibility specified by Ministry of Road Transport and Highways, India. Further, the use of waste polyethylene generally improves the engineering properties especially at a higher temperature, in terms of dynamic moduli value and rutting behaviour of mixtures.