Volume 7, Issue 9, September – 2022 International Journal of Innovative Science and Research Technology ISSN No:-2456-2165 IJISRT22AUG1074 www.ijisrt.com 39 The Effect of Using Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE) Plastic Waste in the Asphalt Concrete Wearing Course (AC-WC) Comparsion of Marshall Characteristics Leily Fatmawati , Arief Subakti Ariyanto, Supriyadi, Parhadi, Sukoyo Civil Engineering Department State Polytechnic of Semarang Indonesia Abstract:- Increasing the quality of hot asphalt mixtures is continuously carried out with various kinds of experiments, one of which is by mixing additives in the form of polymers. LDPE (Low Density Polyethylene) and HDPE (High Density Polyethylene) are polyethylene chain structures that can be found in daily life, such as the form of plastic food wrappers, plastic bags and shopping bags. This study aims to compare the effect of using LDPE and HDPE plastic waste without the use of plastic waste on the characteristics of the hot asphalt mixture Marshall Asphalt Concrete Wearing Course (AC-WC). After obtaining the optimum asphalt content at 5.6%, the optimum plastic content for LDPE is 2.1% and HDPE is 2.4%. The results of the Marshall characteristic test showed that the stability value of the AC-WC hot asphalt mixture with the addition of HDPE plastic waste was higher, that was 1216 kg, compared to the addition of LDPE plastic which was 1130 kg and without the addition of 1211 kg plastic. The value of flow in the addition of LDPE plastic had the highest value, 3.53 mm compared to the addition of HDPE plastic, 3.27 mm and without the addition of plastic which had the lowest value, 3.20 mm. From the results of residual stability testing with IKS (Residual Strength Index), the addition of LDPE plastic was 95.6% and HDPE 93.7%, while without the addition of plastic it was 90.3%. Keyword : Asphalt Mixtures, LDPE, HDPE, Plastic Waste, Marshall Characteristic. I. INTRODUCTION At this time transportation is very important for society. It can be found at this time that almost all of them have vehicles, even though each of them has the least two-wheeled vehicle. Transportation is absolutely necessary for everyone. However, the excessive use of transportation will have an impact on the arrangement of the pavement itself. According to Tjitjik WS (2008), the growth of traffic into heavy and dense traffic is due to the rapid population growth followed by an increase in the need for food, shelter and clothing which causes the pavement to be damaged before the service life is passed where currently there are several sections of road pavement that have no longer able to accommodate the capacity / load of passing vehicles. Apart from that, the weather factor also affects the asphalt immediately due to the weather being oxidized by the sun. The quality improvement of the asphalt mixture is often carried out by experts using asphalt modified with polymeric materials. Apart from pure additives, polymer materials can also be obtained through the extraction process from plastic waste. There are 2 types of plastics that are often used in previous studies, namely LDPE and HDPE. Each type of plastic waste produces different asphalt characteristics depending on the percentage of the mixture of asphalt and the plastic waste used. This study aims to compare the effect of using plastic and without the use of plastic on laston WC, to compare the effect of using low density polyethylene (LDPE) and high density polyethylene (hdpe) plastic waste on laston WC, and to determine the percentage of mixtures of asphalt and plastic waste. the most optimum for testing the characteristics of Marshall. II. RESEARCH METHODS To complete the research, several stages are required as follows: A. Preparation Of Tools And Materials Materials and testing equipment for aggregate characteristics are test equipment owned by the Asphalt Mixing Plant Laboratory of PT. Kadi International unit Karangjati while testing the characteristics of asphalt using equipment at the Semarang State Polytechnic Laboratory. B. Make Test Object Starting with making a test object to get an estimate of the optimum asphalt content (OAC) with the following conditions: