Development of polymer modified asphalt using filler

Abstract

The modified asphalt is used to improve the performance of pavement when traffic loads are applied with changing environmental conditions. In this study, the bitumen was modified by adding Low Density Polyethylene as such as 2%, 4%, 6% and 8% of total bitumen content. The modification of bitumen was analysed under Fourier Transform Infrared Spectroscopy. These physical properties of modified bitumen samples were also investigated through conventional laboratories tests as such penetration test, softening point test and ductility test. The burning limestone, paddy husk ash and rubber dust were used as trial material to modify the asphalt with 1%, 2%, 3%, 4% and 5% of total aggregate content and Marshall Tests of asphalt samples were conducted with 4.6% bitumen content. The 3.2% of burning limestone was preferred to prepare for the asphalt mixture with optimum 6% Low Density Polyethylene content of modified bitumen. The Marshall Test was conducted to obtain the physical properties of modified asphalt mixture. The adhesion between aggregates and bitumen was analysed with bond mechanism which was confirmed that modified asphalt with burning limestone filler would be to increase the durability of pavements.