Civil Engineering Scientific Journal

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Civil Engineering Scientific Journal http://jurnal.borneo.ac.id/index.php/CESJ Civil Engineering Scientific Journal (CESJ) is a scientific journal published by the Civil Engineering Study Program, University of Borneo Tarakan. CESJ is a forum for civil engineering students to publish scientific works, research results, literature, and analytical studies that focus on the field of civil engineering. CESJ published three times a year (January, May, and September). The focus and scope of this journal are structural engineering, concrete & building material, transportation engineering, geotechnical engineering, water resources engineering & coastal engineering, construction engineering & management. CESJ has P-ISSN <a href="https://drive.google.com/file/d/1vdfr0l8Og1pls4nmwEZsFSo5_yrzNIC1/view?usp=sharing" target="_blank">2962-3308</a> and E-ISSN <a href="https://drive.google.com/file/d/18tsDpTWOs3nNZSW9HxlwlEJHY_wFuAUG/view?usp=share_link" target="_blank">2963-1335</a>. Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan en-US Civil Engineering Scientific Journal 2963-1335 With the receipt of the article by the Civil Engineering Scientific Journal Editorial Board and the decision to be published, then the copyright regarding the article will be retained by the authors.With the acceptance of the article by the Editorial Board of this journal and the decision to publish, the copyright of the article remains the property of the Author. The copyright of all papers published in this journal remains the property of the Author. Universitas Borneo Tarakan as the publisher of this journal has the right to distribute all articles in this journal.<img src="https://iptek.its.ac.id/public/site/images/caakali/cc_by_sa1.png" alt="" width="150" /> licensed under aÂ <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>. PERKUATAN ELEMEN BALOK BETON BERTULANG MENGGUNAKAN MATERIAL CFRP : STUDI KASUS GEDUNG BANK http://jurnal.borneo.ac.id/index.php/CESJ/article/view/7301 ABSTRACT: The addition of floors and changes in building function can modify the load distribution and affect the capacity of structural elements, making it necessary to evaluate the existing structure to ensure that it can safely accommodate the new loading conditions. If the capacity is insufficient, strengthening is required, one method being the use of Carbon Fiber Reinforced Polymer (CFRP). This study includes the collection of existing structural data, structural modeling using analysis software, and the application of loads based on actual building conditions. The modeling results are used to assess the beam’s capacity under the additional loads, and if it does not meet the required strength, a strengthening system using CFRP is designed. In this research, an analysis was carried out on beam component B1 As 2-3 with a span length of 4.8 meters, considering an additional dead load from screed of 27.32 kN and an additional live load of 31.93 kN due to the functional change from office space to corridor. These added loads resulted in a new ultimate moment of 642.26 kNm, while the beam’s nominal moment capacity was only 530.29 kNm, indicating a required strengthening of at least 111.97 kNm. The analysis determined that three layers of CFRP were required, and with the CFRP installation, the new nominal moment capacity increased to 766 kNm, providing a total strength improvement of 44%.Keywords: Structural Strengthening, Beam Element, CFRP, Material, Reinforced Concrete. ABSTRAK: Penambahan lantai dan perubahan fungsi bangunan dapat mengubah distribusi beban dan kapasitas elemen struktur, sehingga diperlukan evaluasi untuk memastikan kemampuan struktur eksisting menahan beban baru. Bila kapasitas tidak mencukupi, perkuatan diperlukan, salah satunya menggunakan Carbon Fiber Reinforced Polymer (CFRP). Penelitian ini mencakup pengumpulan data eksisting, pemodelan struktur dengan bantuan perangkat lunak analisis struktur, serta penerapan pembebanan sesuai kondisi aktual. Hasil pemodelan digunakan untuk menilai kapasitas balok terhadap beban tambahan, dan jika tidak memenuhi syarat kekuatan, dirancang sistem perkuatan dengan CFRP. Pada penelitian ini dilakukan analisa komponen struktur balok B1 As 2-3 dengan panjang bentang 4.8 meter dengan penambahan beban mati akibat screed sebesar 27.32 kN dan beban hidup akibat perubahan fungsi ruang kantor menjadi koridor sebesar 31.93 kN. Dari penambahan beban tersebut didapatkan momen ultimate yang baru yaitu sebesar 642.26 kNm. Sedangkan momen nominal balok tersebut hanya sebesar 530.29 kNm, sehingga dibutuhkan perkuatan setidaknya sebesar 111.97 kNm. Dari hasil analisa didapatkan jumlah layer CFRP yang dibutuhkan yaitu sebanyak 3 layer, dengan penambahan CFRP didapatkan momen nominal yang baru yaitu sebesar 766 kNm. Dengan begitu didapatkan penambahan perkuatan sebesar 44%.Kata kunci: Perkuatan Struktur, Elemen Balok, CFRP, Material, Beton Bertulang. Yanisfa Septiarsilia Anditya Hendra Pratama Jaka Propika Indra Komara Heri Istiono Ahmad Hernadi Copyright (c) 2026 Yanisfa Septiarsilia, Anditya Hendra Pratama, Jaka Propika, Indra Komara, Heri Istiono, Ahmad Hernadi 2026-01-02 2026-01-02 5 1 10.35334/cesj.v5i1.7301 PENGARUH SUBSTITUSI VARIASI FLY ASH TERHADAP KUAT TEKAN BATA RINGAN FOAM AGENT CLC (CELLULAR LIGHTWEIGHT CONCRETE) http://jurnal.borneo.ac.id/index.php/CESJ/article/view/7308 ABSTRACT: The West Kalimantan region is dominated by low-bearing capacity peatlands and soft soils, which means that heavy construction loads have the potential to cause significant land subsidence and building cracking. Therefore, lighter structural solutions are needed to reduce the load on the ground. One alternative is the use of CLC (Cellular Lightweight Concrete) bricks, which are made from a mixture of cement, sand, water, and foam agent as the main construction material. The research method used experimental studies at the Materials and Construction Laboratory of Tanjungpura University. The results of this study show that fly ash substitution increases the compressive strength of lightweight bricks by 9,218% at a substitution variation of 4%; 18,244% at a variation of 8%; 29,036% at a variation of 12%; and then decreased again but remained higher by 3,765% at a variation of 17%. The optimum substitution was found to be 9.5% fly ash. This type of fly ash substitution has been proven to improve the performance of CLC lightweight bricks.Keywords: Fly ash; CLC lightweight brick; Compressive strength; Optimum variation ABSTRAK: Wilayah Kalimantan Barat didominasi oleh lahan gambut dan tanah lunak dengan daya dukung rendah, sehingga beban konstruksi yang besar berpotensi menyebabkan penurunan tanah signifikan dan risiko keretakan bangunan. Oleh karena itu, diperlukan solusi struktural yang lebih ringan guna mengurangi beban terhadap tanah. Salah satu alternatifnya adalah penerapan bata ringan CLC (Cellular Lightweight Concrete) yang terbuat dari campuran semen, pasir, air, dan foam agent sebagai material utama konstruksi. Metode penelitian menggunakan studi eksperimental di Laboratorium Bahan dan Konstruksi Universitas Tanjungpura, hasil penelitian ini menunjukkan bahwa substitusi fly ash meningkatkan kuat tekan bata ringan sebesar 9,218% pada variasi 4% substitusi; 18,244% pada variasi 8%; 29,036% pada variasi 12%; dan kembali mengalami penurunan namun tetap lebih tinggi sebesar 3,765% pada variasi 17%. Substitusi optimum terjadi pada penambahan 9,5% fly ash. Substiusi fly ash jenis ini terbukti meningkatkan kinerja bata ringan CLCKata kunci: Abu terbang; Bata Ringan CLC; Kuat Tekan; Variasi Optimum Chelsea Chelsea Erwin Sutandar Asep Supriyadi Copyright (c) 2026 Chelsea, Erwin Sutandar, Asep Supriyadi 2026-01-10 2026-01-10 5 1 10.35334/cesj.v5i1.7308 EVALUASI KAPASITAS RUAS JALAN TERHADAP KINERJA PELAYANAN JALAN (STUDI KASUS: RUAS JALAN P. DIPONEGORO KOTA TARAKAN) http://jurnal.borneo.ac.id/index.php/CESJ/article/view/7345 ABSTRACT: Road safety in school areas is a crucial aspect in supporting safe student mobility, particularly in developing cities such as Tarakan City. Diponegoro Road is one of the corridors with high traffic activity and intense interaction between motorized vehicles and pedestrians, especially during school arrival and dismissal hours. This study aims to evaluate traffic performance and examine its implications for pedestrian safety through a Road Safety Audit approach. A descriptive quantitative method was applied by collecting primary data in the form of traffic volume surveys, side friction observations, and pedestrian facility conditions, as well as secondary data including road geometric characteristics and technical guidelines. Road capacity analysis was conducted based on the Indonesian Road Capacity Guidelines (PKJI) 2023. The results indicate that the effective road capacity is 1,841.62 pcu/hour with a degree of saturation (DS) of 0.63, reflecting stable traffic conditions. However, high side friction activities and limited pedestrian facilities in the school area potentially increase accident risks for students. Therefore, despite acceptable traffic performance, improvements in pedestrian safety facilities are necessary to enhance safety for vulnerable road users in school zones. Keywords: road safety, road capacity, road safety audit, pedestrians, school area ABSTRAK: Keselamatan jalan di kawasan sekolah merupakan aspek penting dalam mendukung mobilitas pelajar yang aman, khususnya di kota berkembang seperti Kota Tarakan. Ruas Jalan Diponegoro merupakan salah satu koridor dengan aktivitas lalu lintas tinggi dan interaksi intens antara kendaraan bermotor dan pejalan kaki, terutama pada jam masuk dan pulang sekolah. Penelitian ini bertujuan untuk mengevaluasi kinerja lalu lintas serta mengkaji implikasinya terhadap keselamatan pejalan kaki melalui pendekatan Audit Keselamatan Jalan. Metode yang digunakan adalah deskriptif kuantitatif dengan pengumpulan data primer berupa survei volume lalu lintas, hambatan samping, dan kondisi fasilitas pejalan kaki, serta data sekunder berupa karakteristik geometrik jalan dan pedoman teknis. Analisis kapasitas dilakukan berdasarkan Pedoman Kapasitas Jalan Indonesia (PKJI) 2023. Hasil penelitian menunjukkan bahwa kapasitas efektif ruas jalan sebesar 1.841,62 smp/jam dengan nilai derajat kejenuhan (DS) sebesar 0,63 yang menandakan kondisi lalu lintas masih stabil. Namun demikian, tingginya aktivitas hambatan samping dan keterbatasan fasilitas pejalan kaki di kawasan sekolah berpotensi meningkatkan risiko kecelakaan bagi pelajar. Oleh karena itu, meskipun kinerja lalu lintas tergolong baik, diperlukan rekomendasi peningkatan keselamatan pejalan kaki melalui penyediaan fasilitas pendukung yang memadai di kawasan sekolah. Kata kunci: keselamatan jalan, kapasitas jalan, audit keselamatan jalan, pejalan kaki, kawasan sekolah Muhammad Kurnia Ririn Handayani Siti Rukiah Yeti Silvana Copyright (c) 2026 Muhammad adi Kurnia, Ririn Handayani, Siti Rukiah, Yeti Silvana 2026-01-17 2026-01-17 5 1 10.35334/cesj.v5i1.7345 PENGARUH BAHAN TAMBAH TIPE D TERHADAP WAKTU IKAT PASTA SEMEN http://jurnal.borneo.ac.id/index.php/CESJ/article/view/7298 Pekerjaan pengecoran dengan beton ready-mix sering terkendala oleh faktor-faktor seperti kemacetan transportasi dan lokasi proyek yang terpencil sehingga dapat menurunkan workability sebelum penempatan di cetakan, dengan itu dibutuhkan waktu ikat beton yang lebih lama. Penelitian ini bertujuan menganalisis pengaruh penambahan bahan tambah kimiawi tipe D, yaitu Sika Plastiment 83 AM, terhadap waktu pengikatan pada pasta semen. Metode penelitian menggunakan studi eksperimental di Laboratorium Bahan dan Konstruksi Universitas Tanjungpura, hasil penelitian ini menunjukkan bahwa penambahan Sika Plastiment 83 AM terhadap sifat beton yaitu peningkatan waktu ikat awal 70 menit pada V2 (0,2% bahan tambah) hingga 130 menit pada V3 (0,4% bahan tambah). Bahan tambah ini terbukti memperbaiki kinerja beton baik dari segi waktu pengikatan, sifat fisis, maupun sifat mekanisnya. Muhammad Kasyiful Kurbi Erwin Sutandar Asep Supriyadi Copyright (c) 2026 Muhammad Kasyiful Kurbi, Erwin Sutandar, Asep Supriyadi 2026-01-27 2026-01-27 5 1 10.35334/cesj.v5i1.7298 STUDI PERENCANAAN POLA OPERASI EMBUNG BENGAWAN UNTUK KEBUTUHAN AIR BAKU KOTA TARAKAN http://jurnal.borneo.ac.id/index.php/CESJ/article/view/7422 ABSTRACT: The construction of the Bengawan Reservoir is a problem regarding the need for raw water in Tarakan City. Because of this problem, it is necessary to carry out a potential study to plan the operation pattern of the Bengawan Reservoir to meet the raw water needs of the Bengawan Reservoir so that it can resolve some of the raw water problems in Tarakan City. The methods used in this research are the F.J Mock method which is used to calculate water availability, the Modified Penman method to calculate potential evapotranspiration and the Wiebull equation to determine the probability of discharge reliability. From the simulation results of the operation pattern of the Bengawan Embung reservoir, it was found that the reliability of the reservoir reservoir in meeting raw water needs. for the West Tarakan Region with each condition the water discharge is sufficient to have 100% reliability to serve 88,937 people, normal water discharge with 100% reliability to serve 88,937 people, low water discharge with 75% reliability to serve 66,703 people, reliable water discharge with reliability 70% capable of serving 62,256 people and dry water discharge with 59% reliability capable of serving 52,473 people. For the North Tarakan Region, with each condition the water flow is sufficient to have 100% reliability to serve 43,471 people, normal water flow with 100% reliability to serve 43,471 people, low water flow with 99% reliability to serve 43,036 people, reliable water flow with reliability 100% to serve 43,471 people and dry water discharge with 90% reliability able to serve 39,124 people. Keywords : inflow, outflow, operating patterns, embung operation simulation ABSTRAK: Pembangunan Embung Bengawan adalah adanya permasalahan akan kebutuhan air baku di Kota Tarakan, karena adanya permasalahan tersebut, maka perlu dilakukan potensi suatu studi untuk merencanakan pola operasi Embung Bengawan untuk memenuhi kebutuhan air baku pada Embung Bengawan sehingga dapat meyelesaikan sebagian permasalahan air baku di Kota Tarakan. Adapun metode yang digunakan dalam Penelitian ini yaitu metode F.J Mock yang digunakan untuk menghitung ketersediaan air, metode Penman Modifikasi untuk menghitung evapotranspirasi potensial dan persamaan Wiebull untuk menentukan probabilitas keandalan debit. Dari hasil simulasi pola operasi tampungan Embung bengawan didapatkan keandalan tampungan embung dalam memenuhi kebutuhan air baku. untuk Wilayah Tarakan Barat dengan masing-masing kondisi debit air cukup memiliki keandalan 100% untuk melayani 88.937 jiwa, debit air normal dengan keandalan 100% untuk melayani 88.937 jiwa, debit air rendah dengan keandalan 75% mampu melayani 66.703 jiwa, debit air andalan dengan keandalan 70% mampu melayani 62.256 jiwa dan debit air kering dengan keandalan 59% mampu melayani 52.473 jiwa. Untuk Wilayah Tarakan Utara dengan masing-masing kondisi debit air cukup memiliki keandalan 100% untuk melayani 43.471 jiwa, debit air normal dengan keandalan 100% untuk melayani 43.471 jiwa, debit air rendah dengan keandalan 99% untuk melayani 43.036 jiwa, debit air andalan dengan keandalan 100% untuk melayani 43.471 jiwa dan debit air kering dengan keandalan 90% mampu melayani 39.124 jiwa.Kata kunci : inflow, outflow, pola operasi, simulasi operasi embung Rosmalia Handayani Risdayana Risdayana Copyright (c) 2026 Rosmalia Handayani, Risdayana Risdayana 2026-01-29 2026-01-29 5 1 10.35334/cesj.v5i1.7422