Study On Engineering Characterization Of Sulfur Modified Bituminous Binders

Abstract

Increased heavy traffic loads and associated tyre contact pressure with poor climatic conditions, fatigue, and rutting effects have generated interest in modified bituminous binders as a consequence of increased demand for bituminous flexible pavement. Various customised binders are now widely accessible across the world. To increase the binder's performance, these modifiers significantly alter the rheological and morphological characteristics of the binder, as determined by rheological and morphological testing methods rather than traditional techniques. Using a Dynamic Shear Rheometer, this study intends to enhance the rheological features of unaged and aged samples of these two binders by changing the typical viscosity grade VG 30 bitumen and adding industrial sulphur from the local market (DSR).

An attempt has been made to identify the essential conditions for binder development, such as mixing/blending time and temperature, using the rheological parameters of phase angle and complex modulus in order to assure adequate adjustment. Bituminous mix fatigue and rutting resistance will be affected by this improvement in the future. Sulphur modification of bitumen was performed at four distinct mixing temperatures: 1000C, 1100C, 1200C, and 1300C, as well as five different mixing times: 5 minutes, 10 minutes, 15 minutes, 20 minutes, and 30 minutes. The ideal adjustment standard was determined using unaging and ageing parsimony for five sulphur levels of 1%, 2%, 3%, 4%, and 5% by weight of the bitumen.