MARSHALL CHARACTERISTICS OF A COMBINATION OF STONE DUST FILLER AND STYROFOAM IN ASPHALT CONCRETE WEARING COURSE (AC-WC) MIXTURE

Asrullah Asrullah Universitas Palembang
Ice Trisnawati
Ayu Ismail
Irfa Kodri
Ida Laila
Muhammad Didin

DOI: https://doi.org/10.36546/tekniksipil.v16i1.2003

Keywords: AC-WC, stone dust, styrofoam, Marshall characteristics, filler, pavement

Abstract

Asphalt Concrete Wearing Course (AC-WC) pavement requires a mixture with good stability, durability, and resistance to traffic loads. One effort to improve the quality of asphalt mixtures is by utilizing alternative materials such as stone dust filler and styrofoam waste. This study aims to determine the effect of the combination of stone dust filler and styrofoam on the Marshall characteristics of AC-WC mixtures and to identify the most optimal mixture variation. The research method used was a laboratory experimental method by conducting Marshall tests on several variations of stone dust filler and styrofoam mixtures. The materials used consisted of coarse aggregate, fine aggregate, 60/70 penetration asphalt, stone dust, and styrofoam. The mixture variations studied included different proportions of stone dust and styrofoam at the same Optimum Asphalt Content (OAC), namely 5.90%. The tested parameters included Bulk Density, Void in Mix (VIM), Void in Mineral Aggregate (VMA), Void Filled with Asphalt (VFA), Stability, Flow, and Marshall Quotient (MQ). The results showed that the addition of styrofoam tended to increase the density of the mixture and the VFA value, while reducing the VIM and flow values. The highest stability value was obtained in the standard mixture at 1007.5 kg and was almost equal to the ABS-3 variation at 1004.6 kg. The highest Marshall Quotient (MQ) value was obtained in the ABS-3 mixture at 324.05 kg/mm, indicating the best combination of strength and stiffness. Overall, the ABS-3 mixture variation provided the most optimal Marshall characteristics compared to the other variations. Based on the research results, it can be concluded that the combination of stone dust filler and styrofoam affects the Marshall characteristics of AC-WC mixtures, and the ABS-3 variation has the potential to become an effective and environmentally friendly alternative pavement mixture through the utilization of styrofoam waste.