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All Journal Rekayasa Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Jurnal Rekayasa Material, Manufaktur & Energi Journal of Renewable Energy and Mechanics Dinamis Jurnal Dedikasia : Jurnal Pengabdian Masyarakat Suara Teknik : Jurnal Ilmiah
Rakhmad Arief Siregar
Universitas Medan Area
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Compressive Strength Characteristics of Mortar Composite Materials Influenced by the Fly Ash Mass Composition Ratio Muhammad Yusuf Rahmansyah Siahaan; Siregar, Rakhmad Arief; Faisal Amri Tanjung; Muhammad Nuh Hudawi Pasaribu
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.15685

Abstract

The application of science and technology to mortar composite materials creates increasingly better economic value advantages and its development potential has a positive impact on the field of building construction with the implementation of household appliances, coral transplant media, sea walls, roads, curbs, paving blocks, reclaimed land, plant vases, wall ornaments, and acoustic panels. Fly ash material as industrial waste has been categorized as non-B3 waste by the government so that the use of Fly Ash can be optimized to maintain environmental sustainability and become a catalyst for driving the community's economy. This study with a 1: 2 ratio mortar material added with fly ash material to analyze the mechanical properties of the material using experimental testing methods on 3 variations of fly ash material compositions in sequence 10%, 30%, and 50% aims to obtain compressive strength characteristics and mass percentage. The test results provide the highest compressive strength value data on 10% fly ash material of 28.10 MPa while other composition variations tend to show a decrease in the ability of material resilience properties in sequence of 9.36% and 20.32%. The mechanical properties of compressive strength meet the quality requirements of SNI 03-0691-1996 for implementation on paving blocks of type B quality and SNI 2442-2020 for application on concrete curbs. The influence of mass composition provides a positive contribution creating an increasing trend towards the mass percentage where the response of fly ash variations is respectively 20.74% and 14.33%.
Development of Wave Energy Conversion Technologies in Sumatera Utara Rakhmad Arief Siregar; Muhammad Yusuf Rahmansyah Siahaan
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17637

Abstract

The increasing energy demand and the serious impact of fossil fuel use on the energy crisis and climate change encourage the development of more sustainable renewable energy sources. This study aims to design a wave conversion device as an alternative energy source for the future. A quantitative approach was used through the distribution of structured questionnaires to 35 respondents, with 29 data points declared valid for analysis. The study focused on user attitudes, knowledge, and behavior towards the device design. Preference data were processed using morphology tables and decision matrices to obtain the most appropriate design. The results showed that respondents tended to choose a pendulum operating system, a horizontal device position, and an aluminum frame, with an expected price below IDR 10 million and preventive maintenance every six months. Based on the evaluation, Concept A was selected as the best design because it was considered technically superior, easy to maintain, cost-effective, and suitable for field conditions. This design was then visualized using CAD software to support the prototyping process. This study shows that the design of a marine energy device that considers user needs and preferences can produce a more realistic, affordable solution and has the potential to strengthen the implementation of marine energy in the transition agenda towards sustainable clean energy. The resulting design offers the development of marine energy technology that is applicable and relevant to the needs of coastal communities.
The Darrieus-Savonius Wind Turbine Development as an Icon of Marine and Culinary Tourism in Belawan Rakhmad Arief Siregar; Chandra Amirsyah Putra Siregar; M Yusuf R Siahaan; Doli Maulana Gama Samudera Lubis
Jurnal Dedikasia : Jurnal Pengabdian Masyarakat Vol. 6 No. 1 (2026): Juni 2026
Publisher : Universitas Islam Negeri Sjech M. Djamil Djambek Bukittinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30983/dedikasia.v6i1.11338

Abstract

The Darrius-Savonius combination wind turbine is often chosen to power streetlights in coastal areas. In this community partnership program (PKM), the primary function of the wind turbine, which is a renewable energy power generator, is slightly shifted to serve as an icon of marine tourism and culinary in the coastal city of Medan, especially in the Medan Belawan sub-district. The main objective of this program is to increase revenue from marine tourism and culinary spots through culinary icons. The culinary icon offered to the community is a wind generator that can operate at low wind speeds, ranging from ~1.5 m/s to a maximum of 45 m/s, which is well-suited for installation in Belawan, near the public pier of the Titi Panjang Bridge. Through this activity, which applies the technology-as-a-service model, the public pier will be illuminated with decorative lights powered by electricity from the wind turbine installed near the community restaurant. The process of selecting the location and type of wind turbine is explained using the decision matrix method. The subject of this program is the Marine Cafe, which is one of the restaurants on the edge of the Titi Panjang Bridge. The construction of wind turbines and their benefits for PkM partners are presented, based on sales data showing a 15-20% revenue increase, which provides an opportunity to increase revenue and develop the PkM partner business in the long term.
STATIC COMPRESSIVE CHARACTERISTICS ON THE OUTOF-PLANE OF HONEYCOMB STRUCTURE WITH HEXAGONAL SIZE VARIATIONS M Yusuf R Siahaan; Rakhmad Arief Siregar; Faisal Amri Tanjung
Journal of Renewable Energy and Mechanics Vol. 7 No. 01 (2024): REM VOL 7 NO 01 2024
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2024.16356

Abstract

Implementasi honeycomb bahan aluminium saat ini sangat tinggi kebutuhannya pada industri manufaktur yang diaplikasikan di bidang konstruksi, penerbangan, kapal laut, automotive, transportasi, dan furniture. Keunggulan panel honeycomb bahan aluminium adalah material logam yang ringan, tahan korosi, peredam getaran, dan tahan lembab. Penelitian ini menggunakan metode eksperimental pada 3 variasi geometri hexagonal cell honeycomb terhadap bidang luar dengan pengujian tekan statik Universal Testing Machine (UTM). Dampak variasi geometri hexagonal cell honeycomb mengungkapkan terjadinya peningkatan nilai kemampuan menerima beban secara signifikan sebesar 44 % model hexagonal cell 2 mm dan lonjakan sebesar 15% model hexagonal cell 4 mm. Geometri hexagonal cell 2 mm dan 4 mm berurutan menunjukkan konstribusi positif terhadap kemampuan menerima beban statik sebesar 39,9 kN dan 30,6 kN. Dampak peningkatan nilai beban secara signifikan didekati melalui persamaan linier y = -6x + 44,333.
Co-Authors Achmad Jusuf Zulfikar Amru Siregar Amru Siregar Chandra Amirsyah Putra Siregar Darwis Saragih Doli Maulana Gama Samudera Lubis Faisal Amri Tanjung Faisal Amri Tanjung Feberius Gea Felyx Berkat Sihombing Goodman Pakpahan M Yusuf R Siahaan M Yusuf R Siahaan Muhammad Nuh Hudawi Pasaribu Muhammad Yusuf R Siahaan Muhammad Yusuf Rahmansyah Siahaan Nasution, Ahmad Yunus Nasution, Ahmad Yunus Nazaruddin Yusman Parulian Malau Riki Juliansyah Rizal, Mahmud Roni Kosasih Saktiawan, Agung Siahaan, M. Yusuf R. Siregar, Doni Alfiah Yusrizha Syahid