The effect of different aggregates and binder types on the mechanical properties of hot mix asphalt

In this study, the effect of different aggregates and binder types on the mechanical properties of hot mix asphalt has been investigated experimentally. Three types of aggregate were used as limestone, basalt and creek material in the study. Limestone from Elazığ city Kömürhan quarry, basalt from Elazığ city Harput concrete quarry and stream material from Bingöl city Genç-Murat sand gravel quarry were provided. Two types of bituminous binders supplied from Batman Refinery (B 50/70 and B 160/220) were used as binders. Asphalt mixtures were prepared using 2 types of bituminous binders in 4%, 4.5%, 5%, 5.5% and 6% ratios for each aggregate group of limestone, basalt, creek material and limestone + creek material. The optimum bitumen ratios of the mixtures were determined by Marshall experiments and the mechanical properties of the mixtures were evaluated. In addition, the stability, flow, density and void values of the mixtures are discussed comparatively. From the results obtained from this study,It was clearly observed that the aggregate group limestone and bituminous binder B 160/220 mixture gave better results because Marshall design parameter values had boundary condition, low bitumen requirement, economical and stability advantages.