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Helmi Haki
Jurusan Teknik Sipil FT Unsri
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Studi Eksperimental Penambahan Biji Plastik dan Fly Ash Pada Karakteristik Campuran Aspal (AC-WC) Yulianti, Dimitri; Ulfah, Luthfiyyah; Lubis, Lega Reskita; Haki, Helmi
Jurnal Talenta Sipil Vol 8, No 1 (2025): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i1.853

Abstract

Infrastructure development requires innovative approaches to enhance the performance of pavements while supporting environmental sustainability. This study aims to identify the impact of adding LDPE 812 plastic pellets and fly ash on the characteristics of an asphalt mixture in the AC-WC layer using the wet mix method. The tests were conducted with variations in the plastic pellet content of 0%, 6%, 6.5%, and 7%. The additives used were LDPE 812 plastic pellets with a specific gravity of 0.917 g/cm³ and fly ash with a specific gravity of 2.71 g/cm³. The tests included aggregate analysis, asphalt characteristics, and Marshall testing to evaluate stability, flow, voids in mix (VIM), voids in mineral aggregate (VMA), voids filled with asphalt (VFA), and Marshall Quotient (MQ). The results of the study showed that adding plastic pellets improved the stability of the asphalt mixture, especially at a plastic pellet content of 6%. At the 6% plastic pellet and 5% asphalt content, the stability value reached 3092 kg, indicating a significant improvement in resistance to deformation and flow. The flow value for the mixture with 6% plastic pellets at 5% asphalt content reached an average of 4.32 mm, while with 7% plastic pellets at the same asphalt content it reached 3.37 mm. At an asphalt content of 5%, the MQ value for a normal asphalt mixture is 338 kg/mm, while an asphalt mixture with 6% plastic pellets reaches 780.51 kg/mm, but decreases to 311.81 kg/mm at a plastic pellet content of 7%. This study suggests that asphalt mixtures with the addition of plastic pellets and fly ash can be an effective and environmentally friendly alternative for the development of sustainable road pavements.
Tinjauan Kapasitas Sistem Drainase di Perumahan Center Park Palembang Menggunakan PCSWMM Al Amin, M. Baitullah; Haki, Helmi; Alia, Febrinasti
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 18 No. 3 (2022)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.18.3.178-193.2022

Abstract

This research focuses on reviewing the drainage system's capacity in Alang-Alang Lebar Center Park Residential Area, Palembang City. Several spots in this area are frequently flooded, especially during heavy rainfall. Field surveys were conducted to acquire the required data, such as topographic maps, aerial photographs, dimensions, and elevations of drainage channels. This research uses the maximum daily rainfall data recorded at the Sultan Mahmud Badaruddin II Airport station for 25 years (1996 – 2020). The return periods used to determine the magnitude of 3 hours-design rainfall are 2 and 5 years. The hydrodynamic simulation of the drainage system was carried out with an integrated 1D-2D model using PCSWMM 2021 Professional 2D version 7.4. The simulation results show flooding occurred in the Willow, Cassia, Bougenville, and Amaryllis blocks. The most significant overflow occurred in the Willow block, causing flood inundation with a maximum height of 0.1 m. Recommendations for increasing the capacity of the drainage system to prevent flood overflows are by enlarging several secondary channels and adding culverts to divert some of the flow discharge in a channel so that it is distributed to other channels. The results of this study are expected to confirm the capability of the PCSWMM model in the design and evaluation of drainage systems in urban areas. Also, the results of this study are expected to emphasize the importance of the role of the hydrodynamic model as a tool for planning the capacity of an adequate drainage system.
Co-Authors Alia, Febrinasti Lubis, Lega Reskita M. Baitullah Al Amin, M. Baitullah Ulfah, Luthfiyyah Yulianti, Dimitri