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ICADME 2021 IOP Publishing Journal of Physics: Conference Series 2051 (2021) 012043 doi:10.1088/1742-6596/2051/1/012043 Compressive strength, sound absorption coefficient (SAC) and water absorption analysis of HDPE plastic waste reinforced polystyrene and Portland cement for lightweight concrete (LWC) Izzati Abdul Manaf1, Noraini Marsi1,2*, Vikneshvaran Genesan1, Efil Yusrianto1,3, Hafizuddin Hakim Shariff4, Suraya Hani Adnan1, Mariah Awang1, Roslinda Ali1, and Mohd Ridzuan Mohd Jamir5 1Faculty of Engineering Technology, University Tun Hussein Onn Malaysia (UTHM), Hub Pendidikan Pagoh, KM1, Jalan Panchor, 84600 Pagoh, Muar, Johor, Malaysia 2Advanced Manufacturing and Material Centre (AMMC), Institute of Integrated Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, 86400 Batu Pahat, Johor, Malaysia 3Universitas Agama Islam Negeri Imam Bonjol, Padang, Indonesia 4Kim Hoe Thye Industries Sdn. Bhd., No.99, Lot 143, Jalan Air Manis, Bukit Mor, 84150 Parit Jawa, Johor, Muar, Malaysia 5Faculty of Mechanical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia *mnoraini@uthm.edu.my Abstract. This project research presents compressive strength, sound absorption coefficient (SAC) and water absorption analysis of High-Density Polyethylene (HDPE) plastic waste reinforced polystyrene and Portland cement for lightweight concrete (LWC). The research is aimed into the issue of waste materials such as HDPE plastic waste and polystyrene waste into lightweight concrete (LWC) application. Modifications with waste material may improve the qualities of lightweight concrete (LWC), and HDPE plastic waste may serve as a partial substitute for natural aggregates, which are rapidly depleting. It has been proposed that HDPE plastic waste and polystyrene be used as an alternative aggregate material to reduce environmental impact. In this study, four composition ratio of HDPE plastic waste reinforced polystyrene and Portland cement to produce LWC; which are (a) 0.5 HDPE plastic waste : 1.0 polystyrene: 1.0 Portland cement, (b) 1.0 HDPE plastic waste : 1.0 polystyrene : 1.0 Portland cement, (c) 1.5 HDPE plastic waste : 1.0 polystyrene : 1.0 Portland cement, and (d) 2.0 HDPE plastic waste : 1.0 polystyrene : 1.0 Portland cement. The highest rate of compressive strength attained was 97.28 kN with the composition ratio of 1.5 HDPE plastic waste: 1.0 polystyrene : 1.0 Portland cement. It was discovered that a larger proportion of plastic lowered the strength of concrete. On the other hand, the optimum composition ratio of HDPE plastic waste reinforced concrete for lightweight concrete (LWC) produces the appropriate strength for LWC when the composition ratio is optimized. For sound absorption analysis, the higher coefficient is 0.42 SAC at 350 Hz to 1500 Hz for the composition ratio of 1.5 HDPE plastic waste : 1.0 polystyrene : 1.0 Portland cement. Water absorption characteristics of HDPE plastic waste and polystyrene for LWC dropped with increasing plastic waste content up to 0.50%. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd 1PDF Image | analysis of HDPE plastic
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