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All Journal Journal of Medical Physics and Biophysics FaST : Jurnal Sains dan Teknologi Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan JMTS: Jurnal Mitra Teknik Sipil Jurnal Pelita Pengabdian PRESUNIVE CIVIL ENGINEERING JOURNAL
Bali, Ika
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Environmental Science Medicine & Pharmacology Physics

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Sediment Characteristics and Prediction of Sediment Yield in Drainage Channel: A Study on Yos Sudarso Street Cikarang City Irianto, Emilia Arista; Sudjatmiko, Eddy Triyanto; Bali, Ika
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol 2, No 2 (2024)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v2i2.5529

Abstract

Yos Sudarso Street, Cikarang City, is crucial for mobility and economic activity. However, Yos Sudarso Street has waterlogging and flooding issues due to severe sediment accumulation, resulting in siltation of the channel, so it cannot flow stormwater properly. This study aims to identify sediment characteristics and predict sediment yield in the drainage channel on Yos Sudarso Street, Cikarang City. It’s essential because sediment has negative impacts on drainage channels. The limited studies on sediment characteristics and sediment yield prediction in urban areas make this study necessary. The bed sediment samples were taken from 3 points in the drainage channel to identify the sediment characteristics. Sediment yield prediction using the Universal Soil Loss Equation method based on rainfall erosivity, soil erodibility, slope length, steepness, and crop management factors. The sediment characteristics at sites 1, 16, and 17 were dominated by large sand grains (0.82-1.81 mm) that were difficult to transport. Poorly sorted indicates low flow energy. Grain size distribution extends to fine grains. Sites 1 and 17 are concentrated at mean size, while site 16 is concentrated at the extreme size. The sediment yield prediction by the universal soil loss equation is 1.989 (t/ha/yr). This information can be used to formulate effective sedimentation control strategies.
Study of Base Shear and Inter-Story Drift due to Earthquake Forces on a Ten-Story Building Structure in Surakarta Assidiq, Yudistira Cahaya; Bali, Ika
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol 3, No 1 (2025)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v3i1.5627

Abstract

Earthquakes are the frequent natural disasters that hit Indonesia as a consequence of the country's geographical location. Surakarta City become a region that frequently suffers the effects of earthquakes. Earthquake disasters threaten high-rise building structures in Surakarta City, where earthquake loads acting on the structure can cause damage and even structural collapse. These historical and geographical reasons become the foundation of this research to analyze high-rise building structures in Surakarta City. In this study, the structural conditions of the analyzed high-rise buildings comply with the equivalent static method's analysis requirements, so that this method can be employed in this research. The equivalent static analysis was conducted through manual calculation and the ETABS program. This study focuses on several structural parameters, including base shear force, and inter-story drift. Based on the analysis that was already conducted, the base shear force was obtained at 14392.365 kN through manual calculation and 14984.490 kN through ETABS program analysis. The inter-story drift value that was already calculated fulfils the maximum threshold requirements, where the inter-story drift values are 17.984 mm – 68.183 mm in the X direction and 9.846 mm - 46.804 mm in the Y direction.
Comparative Study of Molasses and Chemical Retarders on Concrete Compressive Strength and Setting Time Bali, Ika; Matondang, Imanuel
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol 3, No 2 (2025)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v3i2.6324

Abstract

Concrete damage is often linked to reduced structural strength due to rapid setting, which complicates compaction and placement. Chemical retarders are commonly used to address this issue but are costly and environmentally unfriendly. Molasses, a by-product of the sugar industry containing sucrose, glucose, and fructose, offers a potentially eco-friendly and economical alternative. This study compares the effects of molasses and a chemical retarder (Plastiment VZ) at dosages of 0.2–0.4% on concrete compressive strength and initial setting time. Results show that 0.35% molasses increased compressive strength to 25.48 MPa compared to 19.53 MPa in normal concrete, though strength declined at 0.4%. Plastiment VZ showed more consistent gains, reaching 25.90 MPa at 0.4%. For setting time, molasses delayed hydration to 435 minutes (0.4%), while Plastiment VZ extended it further to 690 minutes (0.4%). Thus, molasses can serve as an alternative retarder, though Plastiment VZ provides more stable effects.
Strength Properties of Cellular Lightweight Concrete Bricks Using Sorong Sand Titarsole, Daniel Khen; Bali, Ika; Sudjatmiko, Eddy Triyanto
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol 3, No 2 (2025)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v3i2.6325

Abstract

Infrastructure growth in Sorong requires innovative construction materials that are efficient, durable, and environmentally friendly. Cellular Lightweight Concrete (CLC) bricks are proposed as an alternative to conventional red bricks. This study investigates the compressive strength and density of CLC bricks made with Sorong sand, using Cikarang sand as a comparison. Laboratory trials were conducted to develop a mix design with a target density of 800 kg/m³. The results show that CLC bricks using Sorong sand reached densities of 821.73–867.16 kg/m³ and compressive strengths of 0.81–1.11 MPa at curing ages of 3, 7, and 14 days. These values were slightly lower than those of Cikarang-sand bricks, which achieved densities of 831.11–879.01 kg/m³ and strengths of 0.81–1.26 MPa. The reduced strength of Sorong-sand bricks is related to their lower density. Nonetheless, testing confirmed that Sorong sand meets fine aggregate specifications, making it suitable for CLC brick production and supporting local infrastructure development.
Prediksi Lendutan Akibat Bond Slip Pada Dinding Beton Bertulang [Prediction of Deflection Due to Bond Slip on Reinforced Concrete Walls] Bali, Ika; Sadikin, Sadikin
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 1 No. 1 (2017): NOVEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Deflection occurs on reinforced concrete wall when it reaches the ultimate strength can be contributed by the deflection due to bending, shear and bond slip. The bond slip occurs when the loss of bond between concrete and steel reinforcement, causing the stress distribution becomes disturbed. This generates an additional deflection on the walls of reinforced concrete. This analysis study was conducted to predict the additional deflection due to the bond slip on reinforced concrete walls that were subjected to lateral load at the ultimate strength condition of the walls. The deflection due to bond slip at the ultimate strength condition of the walls is estimated by the strength-of-material concept. The wall ultimate strength is determined as the minimum of flexural and shear strengths that based on a strength-of-material concept, and the shear strength and the Softened strut-and-tie model, respectively. The specimens of reinforced concrete walls used in this study are the reinforced concrete walls with a single curvature that available in the literature. The results of this study indicated that the deflection due to bond slip provides the additional deflection average of 5.5% of the total deflection due to bending and shear as the wall reaches the ultimate strength. This study shows that the effect of deflection due to bond slip is smaller than the deflection due to shear and bending.BAHASA INDONESIA ABSTRAK: Lendutan terjadi pada dinding beton bertulang saat mencapai kekuatan batas dapat dikontribusikan oleh lendutan akibat lentur, geser dan bond slip. Bond slip terjadi ketika hilangnya ikatan antara beton dan baja tulangan, menyebabkan distribusi tegangan menjadi terganggu. Hal ini menghasilkan lendutan tambahan pada dinding beton bertulang. Studi analisis ini dilakukan untuk memprediksi lendutan tambahan akibat bond slip pada dinding beton bertulang yang mengalami beban lateral pada kondisi kekuatan batas dinding. Lendutan akibat bond slip pada kondisi kekuatan batas dinding diestimasi dengan konsep kekuatan material. Kekuatan batas dinding ditentukan berdasarkan minimum dari kekuatan lentur dan geser yang berturut-turut didasarkan pada konsep kekuatan material dan model Softened strut-and-tie. Spesimen dari dinding beton bertulang yang digunakan dalam penelitian ini adalah dinding beton bertulang dengan kelengkungan tunggal yang tersedia dalam literatur. Hasil penelitian ini menunjukkan bahwa lendutan akibat bond slip memberikan rata-rata lendutan tambahan 5,5% dari total lendutan akibat lentur dan geser saat dinding mencapai kekuatan batas. Studi ini menunjukkan bahwa pengaruh lendutan akibat bond slip lebih kecil dari pada lendutan akibat geser dan lentur.
Co-Authors Adjie, Akbar Putro Anthonios, Rich Edrick Assidiq, Yudistira Cahaya Azizi, Muhammad Arrizky Adhita Azkia, Naurah Satya Azzahra, Fya Fadhilla B.M.A.S. Anaconda Bangkara Bangkara, B.M.A.S Anaconda Binsar Hariandja Bong, Phil Benson Bungalolon, Theo Trichius Cilvin Peden Cahyani, Dhea Indah Cahyo, Septian Dwi Damaris, Lucia Geovenerdy, Ravelino Hafizh Hariandja, Binsar H. Illya, Gregoria Irianto, Emilia Arista Ivan Imanuel, Ivan Kaswandi, Carolus Matondang, Imanuel Nabilah, Afina Nawa, Victoria Astra Nugraha, Bimantara Putra Nurhaliza, Mira Pasya, Intan Kumala Pratiwi, Alya Intan Putranti, Zefanya Febe Putri, Mutiara Anisa Sabila, Silfa Sabrina, Shafa Aulia Sadikin Sadikin Sadikin, Sadikin Santoso, Muhammad Iqbal Paramatatya Satyawan Shalsabilla, Aura Soedirgo, Farel Danto Sudjatmiko, Eddy Sudjatmiko, Eddy Triyanto Surbakti, Michelia Esteruli Instia Tanjung, Naisha Elvira Tatanka, I Made Titarsole, Daniel Khen Tumpal Pandiangan Ukas, Rahmadiah Josina Wicaksana, Satria Wijaya, Hans Perdana Wisan, Nathanael Edward