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All Journal Jurnal Teknik Sipil Journal of Applied Civil Engineering and Infrastructure Technology (JACEIT) International Journal of Engineering, Science and Information Technology Nusantara Hasana Journal Innovative: Journal Of Social Science Research
Sujatmiko, Heri
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The Effect Of Holcim Cement Substitution On Fine-Grained Soils Its Influence On The Stability Of Soil Bearing Capacity Using The Terzaghi Method And Meyerhoff Method Sujatmiko, Heri
International Journal of Engineering, Science and Information Technology Vol 3, No 4 (2023)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i4.469

Abstract

Soil is vital as a construction material and load support in civil engineering building work. The aim of stabilization itself is to increase the bearing strength of the soil by increasing soil cohesion and friction angles in the soil and maintaining good soil bearing strength so that it does not experience a decrease due to the influence of weather and air. Based on the Unified classification system, it is included in the OH classification or what is usually called clay soil with high organic plasticity, while based on the ASSHTO classification, the soil in Pancoran Village, Glagah District, Banyuwangi Regency is included in group A-7-5(25). The addition of Holcim Cement to clay soil from the Pancoran Village area, Glagah District, Banyuwangi Regency in the Direct Shear test obtained the most significant value in the 8.5% mixture with a curing time of 9 days for the ? value, namely ? = 19.8 ? from ? = 11.6 ? in the original soil or there was an increase amounted to 41.41% and for the c value, namely c = 9.75 kg/cm2 from c = 1.6 kg/cm2 in the original soil or an increase of 83.59%. The carrying capacity of soil tends to be greater after mixing cement additives. The maximum soil bearing capacity occurs when mixing 8.5% cement with nine days of curing, namely 66,458 t/m2 from 4,696 t/m2 of the original soil capacity or 92.93% for the Terzaghi method. Meanwhile, for the Meyerhoff Method, the maximum soil bearing capacity occurs when mixing 8.5% cement with nine days of curing, namely 92,696 t/m2 from 7,526 t/m2 of the original soil permit carrying capacity of 91.88%.
SUBTITUSI PEMANFAATAN LIMBAH ASBES UNTUK PEMBUATAN PAVING BLOCK DITINJAU DARI KUAT TEKAN DAN NILAI EKONOMISNYA Sujatmiko, Heri
Nusantara Hasana Journal Vol. 4 No. 3 (2024): Nusantara Hasana Journal, August 2024
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v4i3.1178

Abstract

Asbestos waste, which was previously just a dirty, smelly waste product that caused many diseases and polluted the environment, can actually be used to make various types of lightweight construction materials that are useful in human life. This is because apart from being able to be utilized from a technical perspective, processed materials from asbestos waste also have high economic value. This research aims to reduce asbestos waste pollution which pollutes the environment and get the best mixture of asbestos waste for making paving blocks, to find out the compressive strength value of asbestos paving blocks and fine aggregate, by comparing the cost between paving from asbestos waste and normal paving. This research was carried out at the Materials Testing Laboratory, Department of Civil Engineering, University of 17 August 1945 Banyuwangi. The method used in this research is experimental with load simulation as a compressive strength test. The paving block model studied was a paving block with a rectangular shape with test object dimensions of width = 10.5cm, thickness = 6cm and length = 21cm. The results show that normal paving has a slightly higher quality value than the asbestos waste paving blocks studied, but in terms of cost, paving blocks from asbestos waste are cheaper than normal paving blocks.
Analisis Laju Sedimen Berdasarkan Data Unsteady Flow Real Time Dengan HEC-RAS di DAS Bomo Banyuwangi Syafaat, Habib Marjun; Prasetyo, Yohanes Pracoyo Widi; Sujatmiko, Heri; Purnomo, Dimas Aji; Erwanto, Zulis
Journal of Applied Civil Engineering and Infrastructure Technology Vol 6 No 1 (2025): Agustus 2025
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jaceit.v6i1.1114

Abstract

The 2018 flash flood in Banyuwangi Regency highlighted the role of sedimentation in increasing disaster risks. This study aims to analyze sedimentation rates based on real-time unsteady flow data during the rainy and dry seasons, understand the relationship between unsteady flow and sedimentation, and evaluate the role of HEC-RAS in mitigating sedimentation-related risks. Hydrometric measurements were conducted in real-time over seven days in both seasons. Data were analyzed using HEC-RAS and validated using the Mean Absolute Error (MAE) method of bathymetric measurements. The results show that sedimentation rates were higher during the rainy season (2.77 m³/day) compared to the dry season (1.33 m³/day) due to increased discharge and flow velocity. Flow velocity correlates more strongly with sedimentation than discharge, with regression values of 0.8257 in the dry season and 0.4072 in the rainy season. Flood modeling with HEC-RAS indicates that sedimentation increases flood risks, particularly in downstream areas. Therefore, mitigation measures such as river normalization, embankment construction, drainage optimization, and upstream soil conservation are necessary. These findings also support early warning systems to enhance community preparedness for sedimentation-induced floods.
Pengaruh Hidrogel Limbah Popok dan Serat Sabut Kelapa terhadap Kuat Tekan dan Serapan Air Bata Ringan Nugraha, Amien Fatwa; Sujatmiko, Heri; Prasetyo, Yohanes Pracoyo Widi
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.20107

Abstract

Limbah popok dan sabut kelapa merupakan limbah yang mencemari lingkungan karena belum terkelola optimal. Penelitian ini bertujuan memanfaatkan hidrogel dari limbah popok sebagai pengganti foam agent dan serat sabut kelapa sebagai campuran bata ringan untuk meningkatkan sifat mekanis dan nilai ekonomisnya. Penelitian eksperimental ini menggunakan variasi komposisi hidrogel (0%, 1%, 1.5%, 2%) dan serat sabut kelapa (0%, 0.5%, 1%, 1.5%). Hasil menunjukkan bahwa komposisi 1% hidrogel dan 0.5% serat menghasilkan kuat tekan tertinggi sebesar 9,61 MPa, melebihi standar SNI 8640:2018 (6 MPa). Nilai serapan air tertinggi sebesar 13,17% masih di bawah batas maksimum SNI (25%). Analisis biaya menunjukkan penghematan hingga Rp351,00 per unit dengan penggunaan bahan limbah. Kesimpulan penelitian mengindikasikan bahwa kombinasi hidrogel limbah popok dan serat sabut kelapa tidak hanya meningkatkan performa bata ringan tetapi juga memberikan solusi berkelanjutan bagi pengelolaan limbah.
Structural Strength Evaluation of Building Superstructure Using Response Spectrum and Time History Analysis Aditiya, Dio; Purnomo, Dimas Aji; Sujatmiko, Heri
Jurnal Teknik Sipil Vol 25, No 3 (2025): Vol 25, No 3 (2025): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i3.95742

Abstract

Building A of the State University Hospital (RSPTN) of Jember University, with a structural height of 22 meters, consisting of 4 floors and one roof, requires a comprehensive evaluation of seismic performance by SNI 1726:2019 and SNI 2847:2019. This study aims to assess the structural strength and seismic performance of the upper structure using Response Spectrum Analysis and Time History Analysis methods. The analysis was conducted using ETABS v22 software, with input data including architectural and structural drawings, material properties, and loading conditions. Gravity loads (dead, additional dead, and live loads) and seismic loads were applied, with dynamic analysis performed through two approaches: response spectrum analysis using site-specific parameters (SS = 0,8680, S1 = 0,3884, soil type SD), and time history analysis using spectrally matched records from the Tohoku (1999), Iwanuma (2005), and Vina Del Mar Centro (2010) earthquakes. The analysis results show that the structure’s fundamental period is 0,7372 seconds, and base shear values meet design expectations. Inter-story drifts under the response spectrum remain within permissible limits; however, drifts under the time history exceed the threshold, particularly under inelastic conditions. Despite this, structural components, such as beams, slabs, and columns, fulfill the requirements for flexural, shear, and torsional strength.
Optimization Study of Water Allocation in Turus Irrigation Area Using Dynamic Programming Approach Susanto, Rizki Heru; Purnomo, Dimas Aji; Sujatmiko, Heri
Jurnal Teknik Sipil Vol 25, No 3 (2025): Vol 25, No 3 (2025): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i3.95760

Abstract

The irrigation system is one of the key factors influencing agricultural land productivity, particularly in rice fields. Proper and efficient water resource management is a crucial strategy to enhance agricultural production efficiency. The Turus irrigation area, covering 424 hectares, frequently faces challenges in water distribution due to both oversupply and inaccuracies in determining cropping patterns. This study aims to optimize irrigation water allocation in the area to achieve maximum agricultural output. The optimization process involves comparing the water requirements for specific crops with the available water supply to determine the most beneficial allocation. The results show that the water requirement during the second dry season planting period (MK II), from July to October, reaches 5.405,59 m³/ha. Based on the water balance analysis and limited water availability, the optimization is focused on rice and secondary crops during the MK II season. Through a dynamic programming approach, an optimal water allocation was achieved, successfully irrigating the entire 424-hectare area and yielding a maximum profit of IDR 6.538.080.000,00. These findings demonstrate that optimizing water allocation using the dynamic programming method is a strategic approach to improving the efficiency and productivity of the irrigation system.
Co-Authors Aditiya, Dio Nugraha, Amien Fatwa Purnomo, Dimas Aji Susanto, Rizki Heru Syafaat, Habib Marjun Yohanes Pracoyo Widi Prasetyo Zulis Erwanto