Characterization of Porous Asphalt Mixture Using Faunus Ater Shell Ash as Filler and Polyethylene Terephthalate (PET) as Bitumen Additive

This study proposed using Polyethylene Terephthalate (PET) and Faunus ater shell ash (FAA) waste as asphalt binder additives and filler substitutions, respectively, to increase the strength and stability of porous asphalt. A thorough investigation of porous asphalt mixture properties was carried out using a permeability test, void in the mix (VIM), Marshall stability, and cantabro loss (CL). In this study, the stone dust filler was substituted by 0%, 50%, and 100% of FAA. In addition, 2%, 4%, and 6% of PET were used as asphalt binder additives. The permeability test result was in line with the VIM measurement, resulting in Mix 2 (50% stone dust, 50%FAA, and 2% PET) having the highest permeability and VIM value. In comparison, Mix 4 (100% stone dust and 4% PET) has the lowest permeability and VIM value. The Marshal stability results were in reverse with the permeability and VIM value, where Mix 4 resulted in the highest Marshall stability of 1519 kg. The majority of the CL test result was in line with the permeability and VIM value, where the only mixture that failed to satisfy the minimum 35% of CL value was Mix 2 with the CL value of 36%.