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Optimizing bottled plastic waste of Polyethylene Terephthalate (PET) as added material into asphalt and testing of modified plastic waste bottles for further use as an asphalt mixture. Besides, the Indonesian state is ranked second in the world for producing plastic waste into the sea so that the utilization of waste must be done while reducing the increasing amount of waste. Also, the addition of plastic bottle waste to obtain the durability of the pavement structure in a strong case prevents deformation in the traffic load. This study uses the wet process method as an added material into the asphalt. This research was carried out on a mixture of Asphalt Concrete Wearing Course using a 60/70 pen asphalt modified with PET type plastic waste with levels of 0%, 3%, 6%, 9%, and 12%. The purpose of this study was also to determine the Marshall parameters of the characteristics of asphalt concrete with different modified PET asphalt variations. After analysis, the optimum level of optimum use of concrete asphalt mixture is 9% PET with an increase in 33% stability of Marshall value between the use of optimum modified asphalt with 60/70 pen bitumen used. Marshall stability value is resistance to deformation of the pavement structure.