BEHAVIOUR OF BITUMINOUS CONCRETE MODIFIED WITH POLYETHYLENE GLYCOL FOR BLADE AND DISK SHAPED AGGREGATES

T. Srikanth, U. Arun Kumar

Abstract: Aggregates are the principle material in pavement construction. Conventional road aggregates in India are natural aggregates obtained by crushing rocks. Aggregate characteristics such as particle size, shape, and texture etc.., influence the performance and serviceability of pavement. Pavements laid with polymer modified bitumen exhibits greater resistance to rutting, thermal cracking and fatigue damages and hence these were used at locations of higher stress. The present work concentrates on aggregate characteristics which include the shape indices. The particle shapes namely Blade and Disk are being used in the study. The study shows the behavior of the two shapes of aggregate in terms of Penetration, Ductility, Softening Point and Marshall Stability tests with varying percentages of bitumen and also with varying the percentages of PEG. The results of unmodified bitumen mix are compared with the modified bitumen mix against some critical Marshall Mix parameters

Keywords: Shape of the aggregates, Bitumen modified with polymers, PEG, Stability and Flow of bitumen.

DOI: https://doi.org/10.15623/ijret.2014.0302057