Volumetric Analysis and Marshall Characteristics of Stone Mastic Asphalt (SMA) by Adding of Waste Polyethylene Terephthalate (PET) and High-Density Polyethylene (HDPE) Combination
List of Authors
Ary Setyawan, Christian Hadhinata, Florentina Pungky Pramesti
Keyword
Asphalt Mix Performance; High-Density Polyethylene (HDPE); Polyethylene Terephthalate (PET); Stone Mastic Asphalt; Waste Material On Asphalt
Abstract
Plastic pollution has emerged as the most significant contaminant in Indonesia's land and aquatic ecosystems, with an annual production of 7.8 million tons, contributing to severe environmental and health problems. One potential solution to address these issues is the incorporating plastic waste into asphalt mixture materials, particularly stone matrix asphalt (SMA). Plastic waste can be used as an additive or a substitute in SMA mixture. However, previous studies have only focused on the use of a single type of plastic waste, with limited exploration of combining multiple types of plastic waste in SMA mix design. This study aims to calculate and investigate the changes in volumetric analysis values and Marshall characteristics in SMA mixtures with the addition of a combination of polyethylene terephthalate (PET) and high-density polyethylene (HDPE) plastic waste. The research began with designing a job mix formula (JMF) for specimens to determine the optimum asphalt content (OAC). Subsequently, SMA mixture was prepared using the JMF with varying recycled plastic waste (RPW) content at 0% (RPW 0), 5% (RPW 5), 10% (RPW 10), 15% (RPW 15) and 20% (RPW 20) by weight of the OAC. Finally, volumetric and Marshall characterization were conducted. The test results revealed that incorporating RPW influenced the volumetric and Marshall characteristic values of the SMA mixture, with the RPW 10 mixture being identified as the most optimal mixture and met the criteria based on Indonesian National Standard (SNI) 8129:2015