COMPARING PROPERTIES OF BITUMINOUS CONCRETE MIXES PREPARED USING MORTH AND SUPERPAVE GRADATIONS

P. Sarika, A K Sandra

Abstract: Hot Mix Asphalt (HMA) consists of two basic ingredients: aggregate and asphalt binder. HMA mix design is the process of determining Optimum Binder Content which satisfies the Marshall Properties. In the mix design process, selection of suitable aggregate gradation plays an important role in performing the pavement during its service life. In India, MoRTH guidelines are to be followed in selecting the aggregate gradation. Sometimes, it is difficult to achieve the gradation specified by MoRTH due to restrictions in upper and lower limits. It was observed that the gradation specified in SuperPave Mix design which is followed by majority of countries worldwide has little flexibility as compared to the MoRTH gradation. Hence, in the present study Marshall Properties were studied by following two aggregate gradations MoRTH and Superpave. The results obtained from the laboratory experiments shown that the SuperPave aggregate gradation is superior than the MORTH aggregate gradation in almost all the criterions of strength and volumetric parameters.

Keywords: Hot Mix Asphalt (HMA), MoRTH, Superpave

DOI: https://doi.org/10.15623/ijret.2015.0413029