Characteristics Comparison of Refinery Asphalt, Rubberized Asphalt, and Buton Asphalt in Stone Matrix Asphalt Pavement with Marshall and Cantabro Method

The most common flexible pavement used in Indonesia were asphalt concrete and hot rolled sheet, with the most frequently problem caused by the extremely high traffic load. Because of that, an alternative type of pavement needed. Stone matrix asphalt (SMA) is a mixture with gap gradation which contains a large portion of coarse aggregates and forms a skeleton that efficiently spreads the load due to passing vehicles. SMA mixture consists of three types, that is thin SMA, fine SMA and rough SMA. The utilization of several types of asphalt also can be an alternative. In this research will be made a comparison about SMA mixture with buton asphalt, rubberized asphalt, and refinery asphalt based on Marshall properties, followed with Marshall immersion and cantabro test based on the optimum asphalt content. Overall based on the test result, the combination of SMA mixture with rubberized asphalt was the best. It had the highest stability with the lowest optimum asphalt content. While for the marshall immersion test, the stability of all sample after 24 hours soaked in waterbath were decreased. Also based on cantabro test result, the best index of retained strength value were for SMA mixture with rubberized asphalt.