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All Journal Portal: Jurnal Teknik Sipil Jurnal Teknik Sipil dan Teknologi Konstruksi Vocatech : Vocational Education and Technology Journal Jurnal Abdimas Berdaya : Jurnal Pembelajaran, Pemberdayaan dan Pengabdian Masyarakat JITU (Jurnal Ilmiah Teknik Unida) Jurnal Teknik Sipil
Lissa Opirina
Prodi Teknik Sipil Universitas Teuku Umar
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ANALISIS KAPASITAS LENTUR BETON BERTULANG MUTU TINGGI VARIASI ADITIF DAN SUBSTITUSI AGREGAT (FLY ASH BATUBARA, CANGKANG SAWIT DAN PASIR POZZOLAN) Lissa Opirina; Teuku Budi Aulia; Mochammad Afifuddin
JURNAL TEKNIK SIPIL Vol 5, No 3 (2016): Volume 5, Nomor 3, Mei 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

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Abstract

Abstract: The High strength concrete produced with low FAS value require large amount of Cement,aggregates, with the use of additives (silica fume) and super-plasticizer admixture. Meanwhile, material availability are decreasing from natural rock and river. Because of that, continuous research need to be done  with the use of additives and substitute aggregates. This study aimed to analyze the flexural capacity of reinforced concrete beams of high quality with a variety of additives and substitutes aggregate namely palm oil clinkers, pozzolan sand and charcoal fly ash. In this study tested 7 pieces beam with 15 x 30 x 220 cm sized for each additive and the substitution of the aggregate total of the test specimen and the test specimen normal beam. The test object is designed to undergo bending failure. Quality steel (fy) used for the principal reinforcement of 445.63 MPa and shear reinforcement amounted to 381.97 MPa, tensile reinforcement using a screw diameter of 15.8 mm, 11.9 mm diameter rebar press screw and shear reinforcement diameter 11.9 mm screw. High Quality Concrete compressive strength (BMT) without variation additives and substitutes aggregate (normal) obtained at 60.652MPa with FAS0.30. The results showed that all the beams undergo bending failure as planned. The result of bending capacity for normal beam is 2,696. The maximum deflection for a variety of additives obtained at BMT charcoal fly ash (FABB) by the percentage of the amount of deflection of the normal BMT amounted to 210.804% with a maximum load 273.305 kN, whereas, for fine aggregate substitution variation obtained at BMT Pozzolan Sand (PPAH) by the percentage of the amount of deflection 178.392% with a load of 257.02 KN. Comparison BMT beam ductility of charcoal fly ash to block the normal BMT amounted to 130.011%, while the beam BMT PPAH 19.751%. It can be concluded that variations and substitutions aggregate additive can increase the value of deflection and ductility of high quality concrete. Charcoal fly ash has the best value and highly effective to be used.Keywords : High Strength Reinforced Concrete Beam, Bending Capacity, Additives, Aggregates Substitution, Deflection, Ductility.Abstrak: Beton mutu tinggi dibentuk dengan nilai FAS yang rendah, sehingga membutuhkan semen dalam jumlah yang besar, agregat serta penggunaan bahan tambahan / additive (silica fume) dan admixture super plasticizer. Sementara itu ketersediaan material yang berasal dari sungai dan batuan alam semakin berkurang jumlahnya.Oleh karena itu perlu dilakukan penelitian lanjutan tentang penggunaan bahan tambahan pengganti tersebut. Penelitian ini bertujuan untuk menganalisis kapasitas lentur balok beton bertulang mutu tinggi dengan variasi aditif dan substitusi agregat yaitu cangkang sawit, pasir pozzolan dan fly ash batubara. Pada penelitian ini diuji 7 buah balok berukuran 15 x 30 x 220 cm  untuk masing-masing aditif dan substitusi agregat sebanyak satu benda uji dan satu benda uji balok normal. Benda uji didisain untuk mengalami gagal lentur. Mutu baja (fy) yang digunakan untuk tulangan pokok sebesar 445,63 MPa dan tulangan geser sebesar 381,97 MPa, tulangan tarik yang digunakan berdiameter 15,8 mm ulir, tulangan tekan diameter 11,9 mm ulir dan tulangan geser diameter 11,9 mm ulir. Kuat tekan Beton Mutu Tinggi (BMT) tanpa variasi aditif dan substitusi agregat (normal) yang didapat sebesar 60,652 MPa dengan FAS 0,30. Hasil penelitian menunjukan bahwa semua balok mengalami gagal lentur sesuai yang direncanakan.Kapasitas lentur balok normal yang dihasilkan sebesar 2,696. Lendutan maksimum untuk variasi aditif didapat pada BMT fly ash batubara (FABB) dengan persentase besarnya lendutan terhadap BMT normal sebesar 210,804% dengan beban maksimum 273,305 kN,sedangkan untuk variasi substitusi agregat halus didapat pada BMT Pasir Pozzolan (PPAH) dengan persentase besarnya lendutan 178,392% dengan  beban 257,02 KN. Perbandingan daktilitas balok BMT fly ash batubara terhadap balok BMT normal sebesar 130,011%, sedangkan pada balok BMT PPAH 19,751%. Dapat disimpulkan variasi aditif dan substitusi agregat dapat meningkatkan nilai lendutan dan daktilitas beton mutu tinggi. Fly ash batubara memiliki nilai yang terbaik dan sangat efektif untuk digunakanKata kunci : Balok Beton Bertulang Mutu Tinggi, Kapasitas Lentur, Aditif, Substitusi Agregat, Lendutan, Daktilitas.
KAJIAN OPTIMASI KOMBINASI LDPE, CPO, BAN DALAM SEBAGAI PENGIKAT TERHADAP CAMPURAN AC-WC Refiyanni, Meidia; Opirina, Lissa; Ikhsan, Muhammad; Azwanda, Azwanda; Satria, Andrisman; Tripoli, Bambang
Jurnal Teknik Sipil dan Teknologi Konstruksi Vol 10, No 1 (2024): Jurnal Teknik Sipil dan Teknologi Konstruksi
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jts-utu.v10i1.9847

Abstract

Abstract Infrastructure development continues to increase, especially on highway pavement, requiring a lot of materials such as coarse aggregate, fine aggregate, filler and asphalt (Pen 60/70) as a binder. However, the depletion of petroleum reserves which has an impact on the availability of asphalt has encouraged innovation to reduce its use. One potential innovation is the use of a combination of plastic waste (LDPE), Crude Palm Oil (CPO), and used inner tubes as an alternative binding material. This research examines the optimization of the use of this combination in the Asphalt Concrete-Wearing Course (AC-WC) mixture. Indonesia, as a tropical country with a significant area of oil palm plantations, produces abundant CPO. In addition, high use of plastic produces plastic waste that is difficult to decompose, and Indonesia is one of the largest contributors of plastic waste in the world. By utilizing this waste in road pavement, this research seeks to reduce environmental impacts while providing alternative solutions for pavement materials. Tests were carried out with three variations, namely V1 = 3% LDPE : 2% CPO : 10% inner tube : 85% pen 60/70;  V2 = 4%LDPE : 2%CPO : 10% inner tube : 84% pen 60/70; V3 = 5%LDPE : 2%CPO : 10% inner tube : 83% pen 60/70 to determine the characteristics of stability, flow, VMA, Void in Mix (VIM), VFB, and Marshall Quotient (MQ). The test results show that the Optimum Asphalt Content (KAO) value is 5.5%. All variations meet the minimum stability specifications set by Bina Marga(2018). Keywords : LDPE, CPO, Karet Ban Dalam, Pen 60/70, AC-WC
Penentuan Sudut Kemiringan Optimal Instalasi Panel Surya Untuk Memaksimalkan Energi Output: Sistematic Literatur Review T. M. Azis Pandria; Teuku Mizan Sya'rani Denk; Bambang Tripoli; Ary Firnanda; Herdian Saputra; Lissa Opirina
VOCATECH: Vocational Education and Technology Journal Vol 7, No 2 (2025): December
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i2.273

Abstract

AbstractThis paper presents a systematic literature review on determining the optimal tilt angle (OTA) for photovoltaic solar panel installation. The research method uses a systematic literature review approach by analyzing 30 scientific articles published between 2013 and 2025 from the IEEE Xplore, ScienceDirect, MDPI, and Springer databases. The analysis results show that geographic latitude is the dominant factor in determining OTA, with tropical regions requiring an angle of 5°-15° and mid-high latitude regions requiring 30°-60°. The research methodology has evolved from a simple empirical approach to the use of machine learning and artificial intelligence with a prediction accuracy of R² 0.95. For equatorial regions such as Indonesia, the optimal angle ranges from local latitude ± 5° with low sensitivity to deviation (±5° only affects output 3%). The study also identified that seasonal adjustment provides a 6-15% increase in output for mid-latitude regions, but is not cost-effective for tropical regions. The conclusions of this study provide practical recommendations based on geographic zones and identify research gaps related to climate change impacts, optimization for bifacial technology, and development of economically adaptive systems. Keywords:Solar panels; optimal tilt angle; energy optimization; systematic literature review AbstrakNaskah ini menyajikan tinjauan literatur sistematis tentang penentuan sudut kemiringan optimal (optimal tilt angle/OTA) untuk instalasi panel surya fotovoltaik. Metode penelitian menggunakan pendekatan systematic literature review dengan menganalisis 30 artikel ilmiah yang dipublikasikan antara tahun 2013 hingga 2025 dari database IEEE Xplore, ScienceDirect, MDPI, dan Springer. Hasil analisis menunjukkan bahwa lintang geografis merupakan faktor dominan dalam penentuan OTA, dengan wilayah tropis memerlukan sudut 5°-15° dan wilayah lintang menengah-tinggi memerlukan 30°-60°. Metodologi penelitian telah berkembang dari pendekatan empiris sederhana menuju penggunaan machine learning dan artificial intelligence dengan akurasi prediksi R² 0.95. Untuk wilayah ekuatorial seperti Indonesia, sudut optimal berkisar antara lintang lokal ± 5° dengan sensitivitas rendah terhadap deviasi (±5° hanya mempengaruhi output 3%). Penelitian juga mengidentifikasi bahwa penyesuaian musiman memberikan peningkatan output 6-15% untuk wilayah lintang menengah, namun tidak cost-effective untuk wilayah tropis. Simpulan penelitian ini memberikan rekomendasi praktis berbasis zona geografis dan mengidentifikasi gap penelitian terkait dampak perubahan iklim, optimalisasi untuk teknologi bifacial, dan pengembangan sistem adaptif yang ekonomis.Kata Kunci:             Panel surya; sudut kemiringan optimal; optimalisasi energi; Sistematic Literature Review
Co-Authors Andi Yusra Andrisman Satria Anwar Berutu Aulia Rahman Azwanda Azwanda azwanda, Azwanda Bambang Tripoli Cut Siciatina Silvia Cut Suciatina Silvia Deby Ulfa Zulka Dewi Purnama Sari Firnanda, Ary Firzan Firzan Herdian Saputra Isma Isma Meidia Reffiyani Meidia Refiyanni Meidia Refiyanni Mochammad Afifuddin Muhammad Hanif Muhammad Ikhsan Muhammad Ikhsan Refiyanni, Meidia surianti anti T. M. Azis Pandria Teuku Budi Aulia Teuku Mizan Sya'rani Denk