Utilization of Waste Plastic as a Strength Modifier in Surface Course of Flexible and Rigid Pavements
Afroz Sultana.SK1, K.S.B.Prasad2
2 1
PG student, Department of civil engineering, GMR Institute of Technology, Rajam, Andhra Pradesh, India Assistant professor, Dept. of civil engineering, GMR Institute of Technology, Rajam, Andhra Pradesh, India
Abstract
The present study investigates the potential use of waste plastic as a modifier for asphalt concrete and cement concrete pavement. Plastic waste, consisting of carry bags, cups etc can be used as a coating over aggregate and this coated stone can be used for road construction. Different ratios of plastic such as Polypropylene (PP), Low Density Polyethylene (LDPE), and High Density Polyethylene (HDPE) by weight of asphalt were blended with 80/100 paving grade asphalt. Unmodified and modified asphalt binders were subjected to rheological test. The performance tests including, Marshall Stability, loss of stability tests were conducted using plastic coated aggregates and polymer modified bitumen on HMA mixtures. Work has been done by using plastic coated aggregates in cement concrete pavements. The results showed better values for asphalt concrete. This is an eco-friendly process.
Key Words - waste polymer, Hot Mix Asphalt
(HMA), plastic coated aggregates, polymer modified bitumen, Marshall Stability, M20 plain cement concrete.
1. INTRODUCTION
One of the main components of hot mix asphalt (HMA) is asphalt cement binder. Asphalt is used primarily construction of roads and as a major component in roofing materials due to its remarkable binding and waterproofing properties. The behavior of asphalt cement in service is governed by their initial engineering properties as well as by the mechanical and environmental conditions