Optimization of bottle plastic waste with Polyethylene Terephthalate (PET) type as additional material for asphalt can be performed by running a test on modified plastic bottle waste for further usage as the asphalt compound. Besides, Indonesia is placed second in the world rank for producing plastic waste into the sea so that waste domestication becomes a necessity to reduce the increasing amount of waste. Moreover, inserting plastic bottle waste is to get the durability of pavement structure in case of deformation tolerance in the traffic load. The study is oriented to the plastic bottle waste called Polyethylene Terephthalate (PET). The study utilizes the wet process method as asphalt additional material. The present study is executed on the Asphalt Concrete Wearing Course compound by using 60/70 asphalt pen which is modified with PET plastic bottle waste by 0%, 3%, 6%, 9% and 12% levels. The study aims to investigate the Marshall parameter of asphalt concrete characteristics with various asphalt PET modifications. The result of the Marshall parameter shows that asphalt optimum level (AOL) for asphalt 0 % is about 5.9, PET asphalt of 3%, 6%, 9%, and 12% is about 5.95. Based on the analysis, the optimum level of asphalt concrete compounded with 9% PET has improved stability value of 33% between the usage of optimum modified asphalt and asphalt pen by 60/70.

The performance of the modified asphalt concrete pavement structure is done because of the increasing traffic load that occurs along with population growth. The study is needed to review the pavement structure whether it is still able to withstand the load or not at all. An Evaluation was carried out using Falling Weight Deflectometer (FWD) field data to obtain deflection data. Laboratory testing of UMATTA used modified asphalt mixture using Polyethylene Terephthalate (PET) type plastic bottle waste to obtain the relative strength coefficient value as an application combined with secondary data from average daily traffic data on the roads of the Batas Medan City– Batas Lubuk Pakam City. Structural analysis shows that the entire segment requires an added layer with the thickness that is different due to the segmentation performed. In this study to maintain the required service level, namely SCI>1, the pavement must receive periodic maintenance and routine maintenance. elated to using asphalt modification using PET will produce a lower pavement thickness of 11 cm compared to the pavement thickness by the 2017 Pavement Design Manual standard of 16 cm.