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All Journal Teknosains: Media Informasi Sains dan Teknologi Mattawang: Jurnal Pengabdian Masyarakat PENGABDI: Jurnal Hasil Pengabdian Masyarakat Journal of the Civil Engineering Forum Jurnal Flyover Jurnal Teknik Sipil Macca Vokatek : Jurnal Pengabdian Masyarakat Seminar Nasional Hasil Penelitian LP2M UNM International Journal of Environment, Engineering, and Education Jurnal Sipakatau sCEj– : Sustainable Civil Engineering Journal
Mohammad Junaedy Rahman, Mohammad Junaedy
Program Studi Pascasarjana Teknik Sipil, Fakultas Teknik Sipil dan Lingkungan - Institut Teknologi Bandung Jl. Ganesa No.10 Bandung.
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An Assessment of Derelict Building Constructions Situated In Coastal Regions Rahman, Mohammad Junaedy; Hasrul, Muhammad Reza; Ashad, Hanafi; Yusuf, Furqan Ali; Hasrul, Nur Refera
Journal of the Civil Engineering Forum Vol. 10 No. 3 (September 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.10433

Abstract

Reinforced concrete structures constructed in coastal areas in Indonesia often suffer damage before reaching their intended service life, with steel reinforcement corrosion being a major contributing factor. This study aims to investigate the use of concrete structures produced with simple methods and inadequate supervision in coastal regions. Reinforced concrete structures near the coast are susceptible to carbonation due to marine environmental factors, leading to reinforcement corrosion. The study was conducted on the Dande Dandere Market building, Tanakeke Island, Takalar Regency, South Sulawesi. The research method employed quantitative techniques, including surveys and structural testing. Visual inspections were conducted to identify the types of damage present in the building and estimate their causes. Structural testing involved both destructive and non-destructive tests. Concrete compressive strength testing was also conducted to assess the concrete sample’s compressive strength, along with carbonation testing to determine the acidity level of concrete due to the intrusion of salt compounds or carbonation formed within the concrete mass. The research findings indicate structural degradation in the market’s construction, occurring more rapidly than the intended lifespan of the building. Signs of structural degradation in the reinforced concrete construction include spalling of concrete cover on beams, supporting columns, and cantileverslabs, as well as degraded reinforcement, with an average reduction in steel weight of 62.70% over six years, and an average weight loss of 0.103 grams per day. Therefore, efforts are needed to optimize the structural quality of the building through comprehensive repairs, starting from the foundation. However, for cost-efficient alternatives, it is recommended to use timber structural materials for new market construction. The use of timber in coastal buildings, which are vulnerable to marine influences, is more feasible as the presence of saltwater can inhibit wood decay caused by microorganisms.
Perbandingan daya dukung tiang pancang dengan metode empiris (standard penetration test) Mayerhof, Terzaghi, dan Vesic Ardiyanti, Riska; Hasrul, Muhammad Reza; Rahman, Mohammad Junaedy; Muddin, Moeh Asnur Kay; Yusuf, Furqan Ali
Teknosains Vol 17 No 3 (2023): September-Desember
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v17i3.37697

Abstract

Penentuan jenis pondasi yang akan digunakan dipengaruhi beberapa faktor, diantaranya adalah kedalaman tanah keras, jenis tanah pada lokasi, dan beban yang akan dipikul. Terdapat beberapa metode untuk mendapatkan daya dukung suatu tanah dasar pondasi secara teoritis seperti Metode Mayerhof (1956), Terzaghi (1948) dan Metode Vesic (1973, 1974). Penelitian ini bertujuan untuk mengetahui perbandingan daya dukung tanah dengan menggunakan beberapa metode tersebut untuk menganalisis daya dukung tanah. Penelitian dilaksanakan pada bulan Desember tahun 2022. Metodologi penelitian yang diterapkan pada penelitian ini ialah penelitian metode elemen hingga hal yang pertama dilakukan pada penelitian ini ialah pengumpulan data yaitu data primer dan sekunder. Hasil penelitian mendapatan daya dukung ultimit (Qp) pondasi tiang tunggal dengan Metode Mayerhof (1976) sebesar 2144.79 kN, Metode Terzaghi (1948) sebesar 2548.6 kN dan Metode Vesic (1973, 1974) sebesar 1092.63 kN. Dari perbandingan hasil perhitungan, nilai daya dukung tiang yang paling baik digunakan adalah perhitungan daya dukung tiang menggunakan metode Terzghi karena semakin besar daya dukung tanah maka penurunan akan semakin kecil dengan kapasitas ijin tiang lebih besar dari kapasitas ultimit tiang dengan menggunakan nilai faktor aman 2.5
Pembekalan Kompetensi Tambahan Bagi Fresh Graduate Berbasis Sibima Konstruksi Rahman, Mohammad Junaedy; Ahnaf Riyandirga; Hasrul, M. Reza
Vokatek : Jurnal Pengabdian Masyarakat Volume 1: Issue 3 (Oktober 2023)
Publisher : Sakura Digital Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61255/vokatekjpm.v1i3.268

Abstract

Companies require high-quality strategic decision-making (SDM) to achieve their goals, remain competitive, and experience rapid growth.   Securing employment can be a challenging endeavor for recent graduates.   An individual possessing exceptional personal traits and a higher level of competence is regarded as more advantageous to the firm.   Fulfilling such standards might be challenging for prospective employees, particularly those who lack experience, such as recent graduates.   The main issues are twofold: firstly, the difficulty in effectively developing the human resources required for national construction, which involves costly traditional training methods and limited capacity and scope; secondly, the growing number of undergraduate graduates each year, without a corresponding increase in job opportunities. Additionally, the abundance of quality requirements, specific skills, limited employment options, and intense competition place fresh graduates in need of a labor certificate to validate their qualifications.   The primary objective is to enhance the students' comprehension of SIBIMA in order to bolster the number of qualified professionals in the workforce.   The employed methodologies include: lectures, talks, training, and questioning.   The outcome attained is that the partner has acquired knowledge about SIBIMA to enhance the certified workforce.
Exploring Research Trends and Themes in Intelligent Transportation Systems in the Last 10 Years (2014 – 2023) Hasrul, M. Reza; Rahman, Mohammad Junaedy; Helmy, Ahnaf Riyandirga Ariyansyah Putra; Cheng, Aw Yoke; Ahsan, Muhammad
International Journal of Environment, Engineering and Education Vol. 5 No. 3 (2023)
Publisher : Three E Science Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55151/ijeedu.v5i3.90

Abstract

Intelligent Transportation Systems (ITS) are actively working towards transforming transportation systems by implementing solutions that improve the quality and quantity of transportation and traffic data at both individual and collective levels. This research aims to comprehensively analyze the field of Intelligent Transportation Systems (ITS) through a thorough bibliometric analysis covering the period from 2014 to 2023. The goal is to gain an in-depth understanding of the evolution of ITS research. This research employs bibliometric analysis to uncover trends and patterns in studies related to "Intelligent Transportation Systems." The research data is sourced from the Scopus database, encompassing information from document titles, abstracts, and keywords. The time frame considered for this study spans from 2014 to 2023. Studies were identified using the PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analyses) framework. From the 39,846 records identified from the Scopus database, 1,839 studies were included in the analysis. Subsequently, the results are analyzed using the VOS viewer software. The analysis highlights a significant shift in research focus, with core themes like "intelligent transportation sys," "vehicle," "algorithm," and "system" remaining central. Cybersecurity and associated risks have gained prominence due to increased connectivity in ITS. The study identifies promising research directions, including experimental technology validation, real-time traffic management solutions, and IoT and smart city concept integration. This research provides a comprehensive and novel overview of the ITS field's evolution and trends, offering actionable insights for advancing intelligent transportation systems.
Training on Making Lightweight Concrete Using Hazelnut Shell Waste Aggregate for Brick Press Craftsmen: Pelatihan Pembuatan Beton Ringan Menggunakan Agregat Limbah Cangkang Kemiri pada Pengrajin Batako Press Rahman, Mohammad Junaedy; Helmy, Ahnaf Riyandirga Ariyansyah Putra; Asnur, Moeh. Kay Muddin; Iriandy
Jurnal Sipakatau: Inovasi Pengabdian Masyarakat Volume 2 Issue 1 December 2024: Jurnal Sipakatau
Publisher : PT. Lontara Digitech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61220/jsipakatau.v1i6.2443

Abstract

This Community Service Program (PKM) aims to utilize candlenut shell waste as additional aggregate in the manufacture of pressed bricks, providing an innovative solution for waste management while supporting sustainable development. Candlenut shell waste, which is abundant but often thrown away, is processed into environmentally friendly construction materials. Training was provided to brick craftsmen in Makassar to introduce new methods that can improve the quality and mechanical strength of bricks, including compressive strength and thermal insulation properties.The training activities lasted for six months, covering the preparation, implementation, and evaluation stages. Participants were trained on how to mix candlenut shell waste with other raw materials, molding techniques, and the curing process to ensure product quality. As a result, candlenut shell-based bricks have a lighter weight and competitive quality compared to conventional bricks, while providing ecological benefits by reducing the environmental footprint. The positive response from the community shows great potential for further development, including product variations and business opportunities based on this innovation. With continued support, this program not only improves community skills but also encourages collaboration to create real social and economic impacts, making waste management part of the green development solution. Abstrak Program Pengabdian Masyarakat (PKM) ini bertujuan untuk memanfaatkan limbah cangkang kemiri sebagai agregat tambahan dalam pembuatan batako press, memberikan solusi inovatif untuk pengelolaan limbah sekaligus mendukung pembangunan berkelanjutan. Limbah cangkang kemiri, yang melimpah namun sering terbuang, diolah menjadi bahan konstruksi ramah lingkungan. Pelatihan diberikan kepada pengrajin batako di Makassar untuk memperkenalkan metode baru yang mampu meningkatkan kualitas dan kekuatan mekanis batako, termasuk kekuatan tekan dan sifat insulasi termal. Kegiatan pelatihan berlangsung selama enam bulan, mencakup tahap persiapan, pelaksanaan, dan evaluasi. Peserta dilatih tentang cara mencampur limbah cangkang kemiri dengan bahan baku lain, teknik pencetakan, hingga proses curing untuk memastikan kualitas produk. Hasilnya, batako berbasis cangkang kemiri memiliki bobot yang lebih ringan dan kualitas yang kompetitif dibandingkan batako konvensional, sambil memberikan manfaat ekologis dengan mengurangi jejak lingkungan. Respon positif dari masyarakat menunjukkan potensi besar untuk pengembangan lebih lanjut, termasuk variasi produk dan peluang usaha berbasis inovasi ini. Dengan dukungan yang berkelanjutan, program ini tidak hanya meningkatkan keterampilan masyarakat tetapi juga mendorong kolaborasi untuk menciptakan dampak sosial dan ekonomi yang nyata, menjadikan pengelolaan limbah sebagai bagian dari solusi pembangunan hijau.
Evaluasi kepatuhan kendaraan terhadap peraturan overdimension overloading (Studi kasus Unit Pelaksana Penimbangan Kendaraan Bermotor Tana Batue) Hasrul, Muhammad Reza; Riyandirga, Ahnaf; Rahman, Mohammad Junaedy; Fadillah, Noor
Teknosains Vol 18 No 3 (2024): September-Desember
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v18i3.48462

Abstract

Overdimension Overloading (ODOL) merupakan masalah serius di Indonesia yang berdampak signifikan pada infrastruktur jalan dan keselamatan lalu lintas. Penelitian ini bertujuan untuk mengevaluasi kepatuhan kendaraan terhadap peraturan berat di Unit Pelaksana Penimbangan Kendaraan Bermotor (UPPKB) TanaBatue, Kabupaten Bone. Data penimbangan harian dari 1 hingga 12 April 2023 mencakup jumlah kendaraan yang ditimbang setiap hari, klasifikasi pelanggaran berat, dan informasi kendaraan. Metode deskriptif kuantitatif digunakan untuk menganalisis data tersebut. Hasil menunjukkan bahwa rata-rata 123 kendaraan ditimbang setiap hari, dengan 66% kendaraan melebihi batas berat yang diizinkan tetapi masih memenuhi syarat, 11% tidak memenuhi syarat, dan 22% sesuai dengan berat yang diizinkan. Pelanggaran ODOL memberikan tekanan besar pada infrastruktur jalan, meningkatkan risiko kerusakan dan biaya pemeliharaan. Rute distribusi utama antara Makassar dan Bone menunjukkan aktivitas ekonomi yang tinggi, terutama dalam sektor pertanian. Penelitian ini menyarankan peningkatan penegakan hukum dan edukasi kepada pengemudi tentang dampak negatif pelanggaran ODOL serta implementasi kebijakan yang lebih ketat untuk meningkatkan kepatuhan terhadap peraturan berat kendaraan.
Sustainable Lightweight Concrete Using Candlenut Shell as Coarse Aggregate: The Impact of Water-Cement Ratios on Strength and Density Hasrul, Muhammad Reza; Rahman, Mohammad Junaedy; Helmy, Ahnaf Riyandirga Ariyansyah Putra; Natsir, Taufiq; Asrib, Ahmad Rifqi
Journal of the Civil Engineering Forum Vol. 11 No. 3 (September 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.18175

Abstract

This study explores the promising potential of Candlenut Shell Aggregate (CSA) as a sustainable and innovative alternative for lightweight concrete production. Derived from Aleurites moluccanus, CSA is an agricultural by-product characterized by its low density, moderate abrasion resistance, and high water absorption make it suitable for non-structural applications like wall panels and flooring. However, integrating CSA into concrete mixes requires careful management of the water-cement (w/c) ratio which significantly affects compressive strength, density, and workability. Concrete mixes were prepared using the absolute volume method, with w/c ratios ranging from 0.65 to 0.30, to identify the optimal balance. The absolute volume principle was applied for all mix designs. Our results indicate that an optimal w/c ratio of 0.55 yields the most favorable balance, achieving the highest compressive strength of 14.3 MPa and a maximum density of approximately 1850 kg/m3. This specific ratio strikes an ideal equilibrium between adequate cement hydration and effective void minimization within the concrete matrix. Conversely, higher w/c ratios lead to increased porosity, diminishing both strength and density, while lower ratios impair workability, hindering compaction and hydration, ultimately degrading performance. These findings resonate strongly with existing prior research, further emphasizing the crucial need for pre-treatment of CSA, such as soaking or the strategic incorporation of admixtures, to effectively mitigate its inherent high absorption and enhance overall mix performance. In conclusion, this study robustly confirms the feasibility of utilizing CSA as a lightweight aggregate. This represents a significant step towards developing an eco-friendly solution that not only contributes to global sustainability goals by repurposing agricultural waste but also actively reduces reliance on conventional, resource-intensive aggregates. Future research should explore the long-term durability of CSA-based concrete and investigate advanced admixtures to further enhance its properties for broader applications.
Rekayasa Nilai Superstruktur pada Bangunan Rumah Susun Universitas Kristen Indonesia (UKI) Toraja Pareang, Alias; Ashad, Hanafi; Rahman, Mohammad Junaedy
Jurnal Flyover Vol. 4 No. 1 (2024): Februari - Juli
Publisher : Magister Teknik Sipil PPs UMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52103/jfo.v4i1.2166

Abstract

Pada sebuah perencanaan bangunan pemilihan desain dan metode pelaksanaan yang sesuai diharapkan dapat menghasilkan sebuah rancangan bangunan yang tepat biaya, tepat mutu dan tepat waktu. .Sebelum melakukan Penerapan Rekayasa Nilai Pada Superstruktur. Pertama dilakukan yaitu penentuan sistim struktur. Bangunan Rumah Susun Uki-Toraja, peneliti memperoleh data existing struktur bangunan menggunakan Sistim Struktur Ganda (Shear Wall), Penggunaan sistim struktur ganda tersebut berpotensi tidak optimal apabila kekakuan struktur masih memenuhi syarat mengenai Nilai Pundal Mental Struktur atau kekakuan, dengan kata lain meniadakan shear wall pada existing dan cukup menggunakan Sistim Srtuktur Rangka Pemikul Momen. Penelitian ini menggunakan metode tahapan Rekayasa Nilai yaitu tahap informasi, tahapan analisa fungsi tahap kreatif, tahap analisis dan tahap rekomendasi. Pada tahap analisis digunakan metode Perengkingan Bobot Sementara Pekerjaan dan metode Zero-One mencari indeks terhadap kriteria dengan memunculkan preferensi sebagai acuan penting dan kurang penting dari masing-masing alternatif, lalu alternatif terpilih yang mempunyai nilai bobot besar berdasarkan matriks evaluasi pekerjaan. Dari alternatif yang terpilih didapatkan penghematan 11,36%, pada item yang diterapkan Rekayasa Nilai
Evaluasi Kinerja Seismik Struktur Gedung Perpustakaan Lama (Gedung G) IAIN Sorong di Wilayah Rawan Gempa berdasarkan SNI 1726:2019 dan RSNI 9273:202X (Adopsi ASCE 41-17) Kurniawan, Ryan Dimas; Ashad, Hanafi; Rahman, Mohammad Junaedy
Jurnal Flyover Vol. 4 No. 2 (2024): Agustus - Januari
Publisher : Magister Teknik Sipil PPs UMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52103/jfo.v4i2.2198

Abstract

Penelitian ini bertujuan mengevaluasi kinerja seismik Gedung Perpustakaan Lama (Gedung G) IAIN Sorong di wilayah rawan gempa berdasarkan SNI 1726:2019 (Standar Nasional Indonesia untuk Tata Cara Perencanaan Ketahanan Gempa) dan RSNI3 9273:202X (Rancangan Standar Nasional Indonesia untuk Evaluasi dan Rehabilitasi Seismik Bangunan Eksisting, adopsi ASCE 41-17). Gedung G, dibangun tahun 2010, berisiko karena desain pra-standar SNI 1726:2019 dan rencana alih fungsi ke Gedung Pascasarjana. Evaluasi dilakukan menggunakan prosedur Tier 1 (Tingkat 1: Ceklis Konfigurasi), Tier 2 (Tingkat 2: Analisis Kuantitatif), dan Tier 3 (Tingkat 3: Analisis Lanjutan) dengan SAP2000 v23. Hasil menunjukkan defisiensi (kekurangan struktural) berupa soft story (lantai lunak, rasio kekakuan k_1/k_2=0,66 < 0,7), kolom pendek, dan sambungan balok-kolom lemah (19/76 sambungan). Analisis Tier 3 menunjukkan periode getar 0,615 detik (arah X) dan 0,589 detik (arah Y), dengan story drift (perpindahan antarlantai) BSE-1E (Basic Safety Earthquake-1E, Gempa Dasar Keselamatan 1E) sebesar 1,47-1,49% (melebihi batas IO/Immediate Occupancy, Okupansi Segera) dan BSE-2E (Basic Safety Earthquake-2E, Gempa Dasar Keselamatan 2E) sebesar 1,48-1,5% (di bawah batas CP/Collapse Prevention, Pencegahan Keruntuhan). Rasio DCR (Demand-to-Capacity Ratio, Rasio Permintaan terhadap Kapasitas) kolom (3,96-6,52) dan sambungan (2,88-4,31) menunjukkan kegagalan IO dan CP, berisiko runtuh. Rekomendasi meliputi pengujian material dan tanah, penambahan dinding geser (shear walls), pelapisan kolom (jacketing), perkuatan sambungan dengan FRP (Fiber Reinforced Polymer, Polimer Bertulang Serat), dan analisis pushover (analisis dorong non-linear). Penelitian ini mendukung rehabilitasi Gedung G dan pengembangan ilmu rekayasa gempa.
Evaluasi Performa Lapisan AC-BC Akibat Eksposur tanpa Penutupan AC-WC Hasrul, Reza; Saraswati, Rizki Ayu; Rahman, Mohammad Junaedy; Yusuf , Furqan Ali; Haedar, Ahmad Wahidiyat; Iriandy; Mahmuda, Ali Fauzi
Jurnal Teknik Sipil MACCA Vol. 10 No. 1 (2025): Jurnal Teknik Sipil MACCA (FEBRUARI 2025)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33096/3mknrq51

Abstract

This study evaluates the impact of exposure on the Asphalt Concrete – Binder Course (AC-BC) layer without the Asphalt Concrete – Wearing Course (AC-WC) overlay over two years on its mechanical properties and density. Exposure to traffic loads and environmental conditions, such as UV radiation, rainfall, and temperature fluctuations, potentially causes significant degradation. Samples were tested using the Marshall method to analyze stability, flow, air voids, VMA, VFB, and Marshall Quotient, with field data compared to initial laboratory data before. The results indicate a reduction in relative density from 98% to 92–94%, as well as changes in aggregate gradation, particularly in the medium and coarse fractions. Stability was recorded at 3709.99 kg, significantly exceeding the minimum specification of 800 kg, but the flow of 5.77 mm exceeded the 2–4 mm specification range, suggesting a higher tendency for plastic deformation. This study emphasizes the importance of promptly covering the AC-BC with AC-WC to prevent further degradation. Recommendations include the application of a seal coat as a temporary mitigation measure. These findings offer strategic insights for more efficient and durable road infrastructure planning. 
Co-Authors Afiah, Indah Nur Ahmad Rifqi Asrib Ahmad Wahidiyat Haedar Ahsan, Muhammad Andriadi, Andi Muhammad Rezky Andriady, Andi Muhammad Rezky Ardiyanti, Riska Asnur, Moeh. Kay Muddin BP, Muh Syarif Chatarina Umbul Wahyuni Cheng, Aw Yoke Dwiasta, Andi Yusdy Fahrul, Muhammad Hanafi Ashad Hasrul, Nur Refera Hasrul, Reza Helmy, Ahnaf Riyandirga Ariyansyah Putra Iriandy Iriandy Kurniawan, Ryan Dimas Mahmuda, Ali Fauzi Maming, Muhammad Idhil Mappangara, Surianto B. Moeh. Kay Muddin Asnur Muhammad, Ahmad Fauzan Natsir, Taufiq Nurafni Oktaviyah Pareang, Alias Riyandirga Ariyansyah Putra Helmy, Ahnaf Saraswati, Rizki Ayu Tumaadir, Andi Butsainah Yusuf , Furqan Ali Yusuf, Furqan Ali