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All Journal FROPIL (Forum Profesional Teknik Sipil) Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Jurnal Teknologi Berkelanjutan Composite Journal Jurnal Pengabdian Pada Masyarakat Eldimas
Rahmani Kadarningsih
Universitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Transportation

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Journal : Jurnal Teknologi Berkelanjutan

 1 
Potensi Limbah Fly Ash PLTU Anggrek, Gorontalo Utara sebagai Bahan Substitusi Semen Pada Beton Kadarningsih, Rahmani
Jurnal Teknologi Berkelanjutan Vol 13 No 01 (2024): Vol 13 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtb.v13i01.260

Abstract

Accumulation of coal ash waste (fly ash) is a dangerous toxic material (B3) which light and fine so it easily flies in the air. This problem is urgent to be resolved because the production continues to increase in quantity and can cause air and water pollution. Currently, coal waste is used to make bricks, but research needs to be done on its potential as a concrete mixture and even as a cement substitute. Currently, coal waste is used to make bricks, but research necessery on its potential as a concrete mixture and even as a cement substitute. Therefore this research can be an alternative solution to the coal ash waste problem in Gorontalo Province. Research on the use of coal ash as a concrete mixture using crushed stone aggregate and sand from the quarry PT. CMP, Bonda Raya, South Suwawa To obtain a granular distribution that meets the requirements, the proportions used for crushed stone measuring 1-2 cm and measuring 2-3 cm are 65% and 35% respectively. Meanwhile, to obtain a combined gradation of fine and coarse aggregate that meets the requirements, percentages of 55% and 45% are used respectively. Based on the research results, the normal compressive strength value of concrete is 28.827 MPa. The compressive strength of fly ash variations of 5%, 10%, 15%, and 20% is 25,069 MPa, 27,442 MPa, 23,096 MPa, and 20,934 MPa. The compressive strength of fly ash variations is lower than normal concrete. The optimum compressive strength value for fly ash substitution for cement with a 10% variation is 27.442 MPa.
Pemanfaatan Kapur Padam dan Sedimen Danau Limboto Sebagai Bahan Dasar Penyusun Dinding Batu Bata Hulop, Risrianto; Desei, Frice L.; Husnan, Rawiyah; Kadarningsih, Rahmani
Jurnal Teknologi Berkelanjutan Vol 13 No 01 (2024): Vol 13 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtb.v13i01.266

Abstract

This study is based on knowing the compressive strength of bricks. The objectives that can be achieved are to analyze the characteristics of brick walls using lime, sedimentary soil and clay as well as conventional bricks and evaluate the comparative cost of making conventional bricks and lime-mixed bricks plus sedimentary soil. In this study, Data obtained from testing and analyzed quantitatively using appropriate statistical methods. This analysis will help in understanding the relationship between the composition of the mixture, the manufacturing process, and the characteristics of the resulting bricks. From the results of the analysis, the water absorption of bricks mixed with sedimentary materials, clay and lime. variation of sample 1, where the sample mixture (75% / 20% / 5%) water absorption is (29.72%) variation of sample 2, where the sample mixture (50% / 45% / 5%) water absorption is (9.45%) and Sample 3, (25% / 70% / 5%) water absorption is (9.22%). and clay bricks or without a mixture (100%) is (8.25%). This shows that the absorption capacity of mixed bricks of sediment, clay and lime materials which only have two variations 2 and 3. Meet the requirements of SNI 15-2094-2000 which requires a maximum water absorption capacity of 20% of bricks. While the average compressive strength comparison value of mixed bricks of sediment, clay and lime materials. sample variation 1, which sample mixture (75%/20%/5%) compressive strength value (13.6 kg/cm2) sample variation 2, (50%/45%/5%) which compressive strength value (19.8 kg/cm2) and sample 3, (25%/70%/5%) which compressive strength value (7.4 kg/cm2). and clay bricks without a mixture (100%) namely (36.4 kg/cm2). The compressive strength value of mixed bricks of sediment, clay and lime materials. Does not meet the minimum compressive strength requirements for building earthquake-safe houses (≥30).
Pengaruh Pemanfaatan Limbah Kawat Bendrat Sebagai Pengganti Sebagian Agregat Halus Terhadap Kuat Tekan Beton Lestari, Galindra Sekar; Kadarningsih, Rahmani
Jurnal Teknologi Berkelanjutan Vol 14 No 01 (2025): Vol 14 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtb.v14i01.279

Abstract

Every year, millions of tons of construction waste are produced, including wire mesh that is often left unused from the cutting and installation processes. Wire mesh, which serves as a reinforcement for concrete, frequently ends up as waste. With the increasing amount of construction waste, this research proposes the utilization of wire mesh as a partial substitute for fine aggregate in concrete mixtures with variations of 0%, 5%, 7.5%, and 10% by weight of sand, targeting compressive strengths of 21 MPa and 25 MPa. Additionally, 8% fly ash and 0.5% superplasticizer by weight of cement were used. Test specimens were cylindrical, with a diameter of 15 cm and a height of 30 cm, and were tested for compressive strength after 28 days. The results showed an increase in compressive strength of 36% and 9% for concrete grades of 21 MPa and 25 MPa, with the optimum percentage of wire mesh addition being 5%, which resulted in compressive strengths of 33.20 MPa and 31.73 MPa, respectively. However, the compressive strength significantly decreased at the 10% wire mesh variation, with average compressive strengths for the target grades of 21 MPa and 25 MPa being 23.67 MPa and 16.43 MPa, respectively.
Perancangan Desain Terowongan Pelimpah (Spillway) Bendungan Bulango Ulu Menggunakan Tabel Beggs askur, wahyu; Kadarningsih, Rahmani
Jurnal Teknologi Berkelanjutan Vol 14 No 01 (2025): Vol 14 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtb.v14i01.280

Abstract

A tunnel is a tunnel beneath the surface of a mountain or land with both ends open as an entry portal and an exit portal. Based on this, it is necessary to design the spillway tunnel using the Beggs Deformation Stress Table . The design of the spillway tunnel for the Bulango Ulu Dam was designed using a horseshoe shape, Shape B. The tunnel loading was calculated using 10 forms of loading, namely vertical rock pressure, normal horizontal rock pressure, earthquake horizontal rock pressure, horizontal water pressure, vertical water pressure, pressure due to its own weight, water pressure in the tunnel, uplift pressure, horizontal saturated rock pressure, vertical saturated rock pressure. The results of the load calculations are carried out by calculating load combinations with 10 combinations, namely normal conditions, earthquake conditions, normal filling conditions, earthquake filling conditions, normal operating conditions of a fully filled tunnel, earthquake operating conditions of a fully filled tunnel, normal operating conditions of a partially filled tunnel, earthquake operating conditions. the tunnel is partially filled, normal operating conditions the tunnel is empty, earthquake operating conditions the tunnel is empty. From the results of the load combination calculations, moment calculations were carried out using the Beggs Table . The maximum moment is selected for tunnel reinforcement calculations
Co-Authors Aryati Alitu askur, wahyu Ervan Hasan Harun Frice L. Desei, Frice L. Hulop, Risrianto Indriati Martha Patuti Jumiati Ilham Kasmat Saleh Nur Kelilaw, Muhammad Farhan Mahendra Komang Arya Utama Lestari, Galindra Sekar Malak, Munifa Mirzan Gani Rawiyah Husnan Sardi Salim Umar Suna