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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Nusantara Hasana Journal Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Jurnal Indonesia Sosial Teknologi Jurnal Pendidikan Indonesia (Japendi)
Ricky Bakara
Politeknik Negeri Medan, Indonesia
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Pengaruh Penggunaan Plastik HDPE Sebagai Material Substitusi Aggregat Halus dalam Pembuatan Bata Ringan CLC Purba, Marsedes; Budianto, Gallio; Samiran, Samiran; Bakara, Ricky; Afriliany Surbakti, Asri
Jurnal Pendidikan Indonesia Vol. 6 No. 12 (2025): Jurnal Pendidikan Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/japendi.v6i12.9361

Abstract

Krisis limbah plastik global dan kebutuhan akan material konstruksi berkelanjutan mendorong eksplorasi inovasi material ramah lingkungan. Penelitian ini berfokus pada penggunaan limbah plastik High-Density Polyethylene (HDPE) sebagai substitusi parsial agregat halus dalam produksi bata ringan Cellular Lightweight Concrete (CLC). Penelitian ini menggunakan metode eksperimental laboratorium dengan menambahkan HDPE dalam proporsi 0%, 20%, 25%, dan 30% ke dalam campuran CLC untuk mengetahui pengaruhnya. Masing-masing variasi diuji untuk mengetahui kuat tekan, densitas kering, dan penyerapan air setelah proses curing selama 28 hari. Hasil penelitian menunjukkan bahwa penambahan HDPE mempengaruhi sifat mekanik bata ringan secara signifikan, dengan kuat tekan yang menurun seiring peningkatan persentase HDPE. Nilai kuat tekan tertinggi adalah 2,035 MPa pada variasi 0% HDPE, sedangkan nilai terendah adalah 0,375 MPa pada variasi 30% HDPE, yang berada di bawah standar SNI 8640-2018 (minimum 1,8 MPa). Berat isi kering tertinggi adalah 1176,889 kg/m³ pada komposisi 0% HDPE, menunjukkan kerapatan yang optimal, sementara variasi dengan HDPE menunjukkan penurunan berat isi menjadi kisaran 620-726 kg/m³, yang masih memenuhi standar untuk aplikasi nonstruktural (700-800 kg/m³). Penambahan HDPE juga meningkatkan penyerapan air, dengan rata-rata tertinggi 18,61% pada variasi 25%, namun semua variasi masih memenuhi batas maksimum SNI sebesar 25%. Analisis ekonomi menunjukkan bahwa biaya produksi meningkat seiring penambahan HDPE, dari Rp2.454,53 per buah (0% HDPE) hingga Rp5.115,53 per buah (30% HDPE). Dengan demikian, penggunaan limbah HDPE sebagai bahan pengganti menunjukkan potensi yang ramah lingkungan dalam konteks ekonomi sirkular, namun perlu dioptimalkan proporsinya untuk menjaga kualitas struktural bata ringan CLC dan mempertimbangkan aspek kelayakan ekonomi.
Faktor Penyebab Keterlambatan Pembebasan Lahan Pembangunan Jalan dan Jembatan di Lingkungan Balai Besar Jalan Nasional Sumatera Utara Girsang, Arisman; Mulia, Ahmad Perwira; Hasibuan, Gina Cynthia Raphita; Bakara, Ricky; Nasution, Soraya Muthma Innah
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i12.63160

Abstract

Keterlambatan pengadaan tanah merupakan tahap krusial dalam pembangunan infrastruktur jalan dan jembatan, karena keterlambatan pada tahap ini dapat menghambat jadwal konstruksi dan meningkatkan biaya proyek. Di lingkungan Balai Besar Pelaksanaan Jalan Nasional (BBPJN) Sumatera Utara, proses pengadaan tanah masih menghadapi berbagai kendala administratif, kelembagaan, dan sosial-ekonomi yang berdampak langsung pada kinerja proyek. Penelitian ini bertujuan untuk mengidentifikasi faktor-faktor penyebab keterlambatan pengadaan tanah, menentukan bobot pengaruh setiap faktor secara matematis menggunakan metode Importance Index, serta merumuskan strategi mitigasi untuk percepatan prosesnya. Data dikumpulkan melalui kuesioner terhadap empat kelompok responden---Owner, Stakeholder, Tim Appraisal, dan Pemilik Tanah---dengan total 35 indikator penyebab keterlambatan. Analisis dilakukan dengan menghitung Frequency Index (FI), Severity Index (SI), dan agregasi Importance Index (II) rerata kelompok. Hasil menunjukkan lima faktor dengan nilai II tertinggi: C2 (Koordinasi antar instansi memerlukan waktu, 60,79%), C1 (Perizinan dan rekomendasi lambat, 56,26%), H2 (Jumlah warga pemilik tanah banyak, 52,98%), H4 (Banyak pemilik tanah yang memiliki ekonomi rendah, 52,43%), dan H1 (Harga permintaan ganti rugi yang tinggi, 51,49%). Pembahasan menunjukkan bahwa hambatan kelembagaan dan sosial-ekonomi menjadi penyebab dominan. Strategi mitigasi difokuskan pada pembentukan task force lintas instansi, penyederhanaan birokrasi, digitalisasi data bidang tanah, dan sosialisasi publik yang transparan. Penelitian ini menyimpulkan bahwa reformasi tata kelola kelembagaan dan pendekatan sosial berbasis kepercayaan menjadi kunci utama percepatan pengadaan tanah yang efisien, adil, dan berkelanjutan.
ANALISIS KINERJA JEMBATAN GANTUNG PEJALAN KAKI DENGAN MENARA BAJA DAN MENARA KOMPOSIT MELALUI ANALISIS NUMERIK BERBASIS PERANGKAT LUNAK Juni Indriani; Nurkhasanah Rina Puspita; Indi Rezki Uli Simanjuntak; Ricky Bakara; Agnes Br Manurung
Nusantara Hasana Journal Vol. 5 No. 7 (2025): Nusantara Hasana Journal, December 2025
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v5i7.1773

Abstract

This study evaluates the structural performance of a Class I pedestrian suspension bridge using two pylon configurations steel and steel–concrete composite through numerical analysis with SAP2000. The design follows SE Menteri PU No.02/SE/M/2010, SNI 2833:2013, SNI 2833:2013, and SNI 1725:2016. The conceptual model is located at the Kampar River with a 100 m main span, 15 m side spans, and a 1.8 m width. Load cases include dead load, symmetric and asymmetric live loads, seismic loads for zone 4, and wind loads with a design speed of 35 m/s. Results show both models have similar structural responses, although the composite pylon provides higher stiffness. Results indicate that the structural responses of both models are very close, although the composite pylon exhibits higher stiffness. Differences in maximum deformation are minimal: 0.000034 m due to seismic loading, 0.000001 m due to wind, and 0.000003 m for girder deflection. Cable stresses also differ slightly, with values of 0.15 kN/m² for the main cables and 125.81 kN/m² for the backstays. Overall, the composite pylon is considered an efficient alternative for increasing stiffness without significantly altering the structural behavior.
The Influence of HR Management Quality on Improving the Performance of Contracting Companies in North Sumatra Moses Hasiholan Septian Tampubolon; Gina Cynthia Raphita Hasibuan; M. Ridwan Anas; Ricky Bakara
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 6 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i6.1136

Abstract

This research aims to determine the influence of the quality of human resource management on the performance of contractor companies in North Sumatra. The hypothesis proposed is that there is a positive relationship between the quality of human resources and the performance of contractor companies. A total of 24 respondents from 6 contractor companies were selected as samples using the probability sampling method. The research results show that there is an influence between the quality of human resources on company performance. This is proven by the results of the hypothesis test which shows the calculated t value of 10.785, exceeding the t table value of 2.074. Therefore, the null hypothesis is rejected, indicating that there is a significant influence between the quality of human resource management and the performance of contractor companies in North Sumatra. From the research results, it can be concluded that the quality of human resource management has a significant influence on the performance of contractor companies in North Sumatra 84.1%; the remaining 15.9% is influenced by other factors. Therefore, it is recommended to improve the quality of human resource management to improve the performance of contractor companies.
Effect of Compressive Strength and Tensile Strength Value on Fiber Concrete Using Bendrat Wire Fibers Yosia Clinton Purba; Johannes Tarigan; Nursyamsi Nursyamsi; Ricky Bakara
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 9 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i9.4627

Abstract

Concrete is a material used in modern construction and is a very important component in the manufacture of structures. Concrete has advantages, but also disadvantages, namely low tensile strength. To increase the tensile strength of concrete, fibers are added to the mix. One of the efforts made to increase the tensile strength of concrete is the addition of fibers to the fiber-concrete mixture. The purpose of this study is to examine the compressive strength and tensile strength values in fiber concrete if added with variations in fiber addition. An innovation in increasing the value of mechanical quantities in concrete is the use of bent wire fibers as a mixture in fiber concrete. This material is taken from former pieces in construction projects to connect steel reinforcement with Sengkang reinforcement and is also widely found in building shops. The fibers were also analyzed for microstructure using SEM (Scanning Electron Microstructure) tools. The length of this bent wire fiber is 13 mm with a diameter of 0.82 mm and has a minimum tensile strength value of 334.5 MPa. The variations in the addition of these bent wire fibers are 0%, 3%, 6%, and 9% of the total weight of the steel fiber. The soaking life of concrete is 7 days, 14 days, and 28 days. The results of this study show that the more variations in the addition of bent wire fibers, the compressive strength value of concrete and the tensile strength value of concrete will also increase. It can be seen that fiber concrete with an immersion life of 28 days with a variation of 9% added bent wire fiber has a maximum compressive strength value of concrete which is 63,645 MPa and a maximum value of tensile strength of 3,294 MP.
Effect of Addition of Dramix 3D Steel Fiber on Compressive Strength and Tensile Strength in Hpc (High-Performance Concrete) Concrete Agustinus Simangunsong; Johannes Tarigan; Nursyamsi Nursyamsi; Ricky Bakara
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 11 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i11.8761

Abstract

Concrete material is one of the most widely used construction materials in Indonesia due to its high compressive strength and adaptability to various construction needs. Despite its benefits, concrete has limitations, notably its weakness in tension and tendency to crack under tensile stress. This research focuses on High-Performance Concrete (HPC) with compressive strength exceeding 80 MPa, reinforced with 3D Dramix steel fibers to enhance both compressive and tensile strength. The study aimed to evaluate the compressive strength and splitting tensile strength of HPC mixed with varying percentages (0%, 3%, 6%, and 9%) of Dramix 3D steel fibers. Additionally, the methodology involved microstructure analysis using Scanning Electron Microscopy (SEM) and mechanical testing on HPC samples cured at 7, 14, and 28 days. Results indicate that the compressive strength reached a maximum of 94.776 MPa, and tensile strength reached 6.599 MPa with a 9% fiber addition at 28 days, highlighting the material's potential application in high-performance structural elements. The findings suggest that 3D Dramix steel fibers significantly enhance the mechanical properties of HPC, making it a viable option for durable construction.
Co-Authors Afriliany Surbakti, Asri Agnes Br Manurung Agustinus Simangunsong Amrizal Amrizal Astomo, Priaji Yudha Bakar, Badarol Hisham Abu Butarbutar, Frans Tomy Dinnie Ananda Rizky Gallio Budianto - Gina Cynthia Girsang, Arisman Hasibuan, Gina Cynthia Raphita Ilhamsyah Siregar, Sutan Indi Rezki Uli Simanjuntak Indra Jhon Fischer Johannes Tarigan Juni Indriani M. Ridwan Anas Marsedes Purba - Mg, Taufiqurrahman Moses Hasiholan Septian Tampubolon Mulia, Ahmad Perwira NUGRAHANI, MEIGA Nurkhasanah Rina Puspita Nursyamsi Nursyamsi Nursyamsi Nursyamsi Raphita Hasibua, Gina Cynthia Raphita Hasibuan, Gina Cynthia Ruben Situmorang Samiran, Samiran Soraya Muthma Innah Nasution Sutiyo, Heri Tampubolon, Gustav Reynold TARIGAN, Johannes Yosia Clinton Purba