The Influence of Basalt Aggregate on The Mechanical Performance of Hot Mix Asphalt (HMA) Mixtures

Abstract

The increasing of traffic load within years reduced the ability to withstand the load path structure, stiffness and strength of the pavement. Along with the development in heavy traffic volume on roads, particularly in tropical locations, the rutting impact has emerged as one of the most significant failures in recent years. A great deal of research has been done to improve the durability and long-term performance of asphalt mixtures in dynamic environments. This paper investigates the effect of basalt aggregate on the improvement of rutting and moisture performance of hot mix asphalt (HMA) mixtures. In this respect, Marshall mix design was employed in the preparation of the specimens. Dynamic creep and moisture susceptibility test have been carried out to evaluate the mechanical properties of the HMA mixture with 30%, 50% and 100% of basalt aggregate replacement. As a result, the performance (creep modulus, permanent deformation and tensile strength) of modified HMA improved remarkably 40- 90% with replacement of 50% basalt aggregate. Based on this studies, the basalt aggregate and its combinations with granite aggregate in asphalt mixes has a significant effect on mechanical properties of HMA mixtures.