Influence of Recycled Acrylonitrile Butadiene Styrene (ABS) on the Physical, Rheological and Mechanical Properties of Bitumen Binder
Piyush Singh, Sanjeev Kumar Suman, Mukesh Kumar
Abstract
This paper presents a laboratory study of bitumen binder modified with recycled acrylonitrile butadiene styrene (ABS) polymer. ABS has been blended in the bitumen in variegated percentages from 1 to 5% with an increment of 1%. The physical and rheological properties of unmodified and modified binder were investigated using penetration test, softening point test, viscosity test and dynamic shear rheometer (DSR) test. The result indicated an increase in softening point, dynamic viscosity and decrease in penetration up to 4% modifier content and then follows the reverse trend. The blending of bitumen with ABS also increased the rutting resistance parameter (G*/sinδ) and reduced the phase angle indicating an improvement in high temperature performance of bitumen binder along with improvement in its elastic properties. The stripping properties of the modified binder also get improved. The best improvement in the modified binder was obtained with 4% ABS additive. The Marshall stability value also significantly improved at this additive content.