THE EFFECT OF HDPE PLASTIC WASTE SUBSTITUTION ON SAND IN AC-WC TYPE ASPHALT CONCRETE MIXTURE TO KNOW THE MARSHALL CHARACTERISTICS AND OAC VALUE

Abstract

The use of HDPE (High Density Polyethylene) plastic waste as a substitute material for sand in asphalt concrete has the potential to enhance the durability of asphalt. This aims to reduce the total amount of plastic waste around us, which is predominantly generated form household waste. One of the components of asphalt concrete that can be substituted with HDPE is fine aggregate. This research was conducted at the Materials Testing Laboratory, Civil Engineering Building, Politeknik Negeri Malang. The Marshall method was used with a total test specimens of 27. There are 15 specimens of normal asphalt with asphalt content variations of 4,5%; 5%; 5,5%; 6%; and 6,5%. And 12 specimens substituted with HDPE plastic variations of 0%, 2%, 4%, and 6%. From these tests, stability, flow, VIM, VMA, VFB, and KAO will be obtained. The stability for the 0% HDPE plastic variation is 1862.50 kg, and for 2% plastic is 2133,13 kg. This shows an approximate 14% increase in stability from 0% to 2% plastic. The flow for the 2% plastic substitution increased by about 5% from the 0% plastic. Based on the experiments, asphalt stability increases with higher plastic substitution levels. It can be concluded that substituting plastic in asphalt concrete mixtures enhances Marshall parameters and reduces the use of asphalt as a binding agent.