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INDONESIA
Civil Engineering Journal
Published by C.E.J Publishing Group
ISSN : 24763055     EISSN : 24763055     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Civil Engineering Journal is a multidisciplinary, an open-access, internationally double-blind peer -reviewed journal concerned with all aspects of civil engineering, which include but are not necessarily restricted to: Building Materials and Structures, Coastal and Harbor Engineering, Constructions Technology, Constructions Management, Road and Bridge Engineering, Renovation of Buildings, Earthquake Engineering, Environmental Engineering, Geotechnical Engineering, Highway Engineering, Hydraulic and Hydraulic Structures, Structural Engineering, Surveying and Geo-Spatial Engineering, Transportation Engineering, Tunnel Engineering, Urban Engineering and Economy, Water Resources Engineering, Urban Drainage.
Arjuna Subject : -
Articles 23 Documents
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Search results for , issue "vol. 12 no. 8 (2026): august" : 23 Documents clear
Real-Time Web-Based Monitoring of LUSI Dyke Deformation Using Low-Cost GNSS Septya Zahrina Azatil Ismah; Mokhamad Nur Cahyadi; Putra Maulida; Willem Sidharno; Ronny Mardiyanto
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-023

Abstract

The Sidoarjo mudflow disaster, which began in 2006, has raised concerns about the stability of the surrounding embankments, making deformation monitoring essential for preventing potential failures. This study develops a low-cost GNSS-based system integrated with NTRIP for real-time deformation monitoring of the Sidoarjo mudflow embankment. The system uses U-blox F9P GNSS modules for both the base and rover stations, transmitting real-time position corrections to ensure accurate measurement of ground movement. Data from the GNSS receivers are uploaded to Dropbox and synchronized with Firebase for real-time visualization via the SHIFT PPLS website. Deformation velocity was analyzed using linear regression, RMSE, and statistical tests, comparing low-cost GNSS measurements with geodetic GNSS measurements. Results show that the low-cost GNSS system achieved horizontal deformation velocities ranging from -2.67 to 2.93 cm/month and vertical velocities from -4.97 to 32.20 cm/month at different observation points. The analysis revealed that the low-cost GNSS system provides accuracy comparable to geodetic GNSS systems, with an RMSE of 0.005 to 0.111 meters. The proximity of the local base station significantly improved the precision and consistency of the measurements. This study highlights the potential of low-cost GNSS technology as an effective, cost-efficient alternative for long-term and sustainable deformation monitoring, which is essential for disaster management in geohazard-prone regions.
Assessment of Seismic-Induced Liquefaction Susceptibility Using Unconsolidated Undrained Triaxial Testing Harryanshah Hamansa; Habib Musa Mohamad; Nur Fazielah Nasir; Heryanti Awang Omar; Sajiharjo Marto Suro
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-011

Abstract

Seismic-induced soil liquefaction poses significant risks to infrastructure in regions characterized by loose, saturated coastal deposits and moderate seismic activity. This study aims to evaluate the liquefaction susceptibility of tropical soils using laboratory-based shear strength characterization as a preliminary assessment framework. Soil samples were collected from two coastal locations and subjected to comprehensive index property testing, including grain size distribution, Atterberg limits, moisture content, specific gravity, and pH analysis. Static strength behavior was evaluated using Unconsolidated Undrained (UU) triaxial compression tests under confining pressures of 25, 50, 100, and 200 kPa. Results reveal distinct mechanical responses between the two soil origins. Soils with lower plasticity indices (PI = 12–19) exhibited moderate susceptibility characterized by limited strain-softening behavior at low confinement, while higher-plasticity soils (PI = 23–25) demonstrated confinement-dependent responses with pronounced post-peak softening under low effective stress conditions. Peak undrained shear strength increased significantly with increasing confining pressure, indicating stress-dependent liquefaction resistance. The findings highlight the critical influence of plasticity, confinement level, and soil structure on undrained stability. This research contributes baseline laboratory evidence for tropical coastal soils and establishes a region-specific framework for preliminary liquefaction screening in seismic-prone environments.
Dynamic Simulation for Sustainable Construction and Demolition Waste in Island Regions Meidy Kempa; Tri Joko Wahyu Adi; Moh. Arif Rohman; Yusroniya Eka Putri Rachman Waliulu; Farida Rahmawati
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-09

Abstract

Construction and Demolition waste (C&D waste) in island regions is predicted to rise with infrastructure development, but its management is challenged by limited landfill capacity, inadequate treatment facilities, and inter-island transport barriers. The purpose of this study is to develop a System Dynamics (SD) model for estimating C&D waste generation and evaluating engineering scenarios for more sustainable waste management in island contexts. The analysis was based on field surveys, waste generation records, infrastructure project statistics, document evaluation, and expert interviews used to validate contextual assumptions. The model was developed using Causal Loop Diagrams and Stock & Flow Diagrams, and it was expanded with two policy scenarios, namely on-site sorting policy and transportation optimization, both individually and in combination. The findings show that the base model projects a continuous rise in C&D waste through 2034. Scenario testing indicates that on-site sorting can reduce waste growth by up to 41.5%, transportation optimization by up to 44.2%, and the combined scenario by up to 74.8%, while also producing narrower uncertainty bands in sensitivity analysis. The novelty of this study lies in integrating dynamic simulation with island-specific logistical constraints to provide a robust and adaptable decision-support framework for evidence-based C&D waste management and sustainable infrastructure planning in island regions.
Turning Waste Into Resources: Eco-Efficient Geopolymer Concrete Incorporating Rice Husk and Sugarcane Bagasse Ash Devadharshini.M; Vasugi.K
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-08

Abstract

The environmental consequence of ordinary Portland cement (OPC), which accounts for 7–8% of worldwide CO₂ emissions, demands the development of low-carbon alternative binders. This research develops and enhances geopolymer concrete (GPC) obtained from agro-waste, utilizing rice husk ash (RHA) and sugarcane bagasse ash (SCBA) as supplementary aluminosilicate precursors in combination with ground-granulated blast-furnace slag (GGBS). A Central Composite Design within Response Surface Methodology optimized three variables—RHA content (10–40%), SCBA content (10–30%), and NaOH molarity (8–12 M)—across twenty mix configurations. Compressive, split-tensile, and flexural strengths were assessed at 7 and 28 days, along with microstructural characterization using XRD, SEM-EDX, and FTIR techniques. The optimized formulation (10% RHA, 10% SCBA, 11.9 M NaOH) attained compressive strengths of 39.2 MPa and 47.1 MPa at 7 and 28 days, respectively, in addition to split-tensile and flexural strengths of 7.34 MPa and 7.54 MPa at 28 days. All models produced R² values greater than 0.97 and an Average Relative Deviation (ARD) below 5%. Microstructural investigation verified the development of dense N-A-S-H and C-A-S-H gels, with the optimized mixture achieving an approximate 60% reduction in embodied CO₂ compared to OPC. This study is the inaugural investigation to concurrently optimize the ternary RHA–SCBA–GGBS system utilizing RSM-CCD, illustrating that agricultural by-products can attain structural-grade performance while promoting circular economy principles in sustainable construction.
Assessment of Groundwater Irrigation Sustainability Using Stable Isotope and Hydrochemistry Techniques Paston Sidauruk; Rasi Prasetio; Satrio; Evarista R. Pujiindiyati
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-014

Abstract

Although Indonesia has 8.1 million hectares of rice fields, its production capacity is still inadequate to satisfy domestic demand. To address this shortfall, the government has increased reliance on groundwater for irrigation, especially in areas where the availability and quality of surface water do not support year-round cultivation. As an alternative, the government has prioritized groundwater irrigation. Several groundwater irrigation networks (GIN) have been established across Indonesia, including one in Klaten Regency, Central Java Province. There are 14 operational wells within GIN in the Klaten area, each with an average discharge of approximately 15 to 20 liters per second. The wells vary in depth from 130 to 150 meters. Each well is used to irrigate rice paddies that cover approximately 15 to 25 hectares. Some of the wells have been in operation for over 10 years. The objective of this study is to assess the sustainability of GIN by examining the recharge area, recharge rate, and the interaction between surface water and groundwater in the wells. This assessment analyzes lateral and temporal variations in stable isotope compositions, hydrochemical contents, and physical parameters of samples collected from various sources, including GIN wells, springs, dug wells, rivers, irrigation channels, and ponded water in paddy fields. The study indicates that groundwater is replenished from the foothills of Mount Merapi, located at elevations between 300 and 2,500 meters above sea level. The extraction rate of the GIN, which is significantly lower than the estimated recharge rate, along with the limited interactions between groundwater and surface water, supports the conclusion that the GIN in this area has negligible adverse environmental impacts. Regulating the recharge and discharge of the aquifer can ensure sustainable groundwater utilization; specifically, the decline in water levels during the dry season can be restored in the wet season.
From Commodities to Corridors: Siting and Financing Agro-Processing Along the Trans-Sumatra Toll Road Gunawan Saroji; Mohammed Ali Berawi; Hilman Wardhana; Mustika Sari; Siti Rahma Utami; Perdana Miraj
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-012

Abstract

This research establishes a corridor-focused screening framework aimed at prioritizing agro-processing siting and funding along the northern section of the Trans-Sumatra Toll Road (JTTS) in Aceh and North Sumatra. Sectoral specialization is initially determined through the Location Quotient (LQ) based on the Gross Regional Domestic Product (GRDP) structure at the district level, subsequently refined via development-readiness indicators and assessed against corridor accessibility using distance bands to toll gates. Capital requirements are evaluated and adjusted to 2022 prices by applying the time value of money to create an indicative investment envelope. The evaluation procedure underscores nine essential regions and four vital sectors—rice milling, integrated coconut processing, food production, and palm oil refining. The findings suggest that proximity to the corridor significantly influences feasibility: sites within reasonable access bands demonstrate clearer short-term viability, while locations exceeding 15 km from toll access are conditionally feasible and highly sensitive to feeder-road stipulations. The estimated early funding framework is roughly IDR 15.87 trillion, chiefly directed towards capital-intensive palm oil areas. This study's contribution lies in implementing a transparent and auditable stepwise prioritization logic that connects specialization, readiness, access, and capital intensity into a screening-level decision-support tool, while explicitly addressing access constraints, utilization risks, and environmental compliance factors.
UAV Photogrammetry and Geodetic Techniques for Concrete Dome Deformation Assessment Ramy Kelliny; Ashraf A. A. Beshr; Magdy Israil; Magda H. Farahan
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-018

Abstract

Historic reinforced concrete domes represent valuable cultural and architectural heritage that requires accurate geometric assessment to ensure their structural stability and support long-term conservation. This study proposes an integrated methodology for assessing the geometric deviations of a historic reinforced concrete dome at St. Mary and St. Joseph Church in Alexandria, Egypt. The proposed methods combine UAV close-range photogrammetry, terrestrial laser scanning (TLS), and total station observations to generate high-resolution three-dimensional models and evaluate the as-built geometry against the theoretical design. Cross-sectional and geometric analyses were performed to investigate radial, vertical, horizontal, and centric deviations, while the reliability of the photogrammetric data was verified through camera calibration and comparison with independent geodetic measurements. The results demonstrated that the integrated methodology successfully identified geometric irregularities and deformation patterns with a high level of consistency among the three surveying techniques. The validation process confirmed the reliability of UAV photogrammetry for structural deformation assessment when integrated with TLS. The proposed framework provides a practical and accurate solution for the geometric evaluation and long-term monitoring of historic concrete domes, contributing to improved structural condition assessment and supporting maintenance, conservation, and heritage preservation programs.
Hybrid Nano-Modified Cementitious Systems for Enhanced Oil-Well Cement Performance Under HPHT Conditions Ibrahim Abdulwahhab Atiyah; Ali A. Salman; Dalia A. Rasool; Ahmed S. Abbas; Mohammed Ali Abdulrehman; Ali M. Flayyih; Kadhim K. Resan; Samer S. Abdulhussein
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-015

Abstract

Class G oil-well cement exhibits compressive strength retrogression, high permeability, and poor chemical resistance under HPHT wellbore conditions, thereby posing risks to effective zonal isolation. This research explores hybrid nano-modified supplementary cementitious systems as a possible sustainable alternative to conventional systems. Four different modified mixes, including silica flour–fly ash–nano-silica, slag–fly ash–nano-silica, and latex–silica fume–nano-silica systems, were compared with neat Class G cement. The specimens were cured under HPHT conditions, ranging from 90 to 120 °C at 15 MPa for up to 90 days, and were also subjected to thermal cycling and CO₂/sulfate environments. They were analyzed using methods such as compressive strength testing, gas permeability testing, XRD, SEM, TGA, MIP, micro-CT, and nano-indentation. Neat cement showed retrogressive compressive strength behavior and high permeability, while the hybrid systems maintained more than 90% of their strength, developed compressive strength higher than 40 MPa, and showed lower permeability below 0.05 mD. From a microstructural perspective, portlandite depletion, refined pores smaller than 60 nm, and increased tortuosity of the pore network can explain these improved properties. The originality of this research lies in the comprehensive analysis of hybrid nano-modified SCM systems under HPHT, thermal cycling, and chemical exposure environments.
Probabilistic Spatio-Temporal Prediction of Corrosion in RC Bridges for Sustainable Maintenance Using Hybrid Kriging–HMM Tri Joko Wahyu Adi; Supani; I Putu Artama Wiguna; Muhammad Ilham
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-019

Abstract

Reinforced concrete bridges in coastal environments are highly vulnerable to chloride-induced corrosion, which accelerates structural deterioration and increases maintenance demands. Conventional prediction models often fail to capture spatial heterogeneity in environmental exposure and temporal uncertainty in deterioration processes. This study aims to develop an uncertainty-aware spatio-temporal framework for predicting corrosion deterioration and supporting sustainable bridge maintenance decision-making. A hybrid Kriging–Hidden Markov Model is proposed to integrate spatial and temporal uncertainties within a unified probabilistic framework. The Kriging module reconstructs spatial chloride concentration fields from sparse environmental data, while the Hidden Markov Model captures stochastic transitions among latent deterioration states based on corrosion observations, with spatial exposure explicitly incorporated as a probabilistic driver. The framework is applied to three reinforced concrete bridges in Indonesia with varying exposure conditions. The results indicate distinct deterioration trajectories, with nearshore bridges reaching critical damage states at approximately 30 years, compared to about 58 years for inland structures. Model validation against inspection data demonstrates robust predictive performance. The probabilistic outputs provide actionable indicators, including time-to-failure distributions and critical deterioration thresholds, supporting risk-informed and sustainable maintenance strategies. The key novelty of this study lies in integrating spatial environmental variability with probabilistic temporal deterioration modeling within a unified framework to enable adaptive and lifecycle-oriented bridge maintenance decisions.
Tool Rotation Speed and Joint Configuration Effects on ODFSW Extruded Aluminum Panel Properties Ericha D. W. S. Putri; Yoga Syahbani Indra Wijaya; Yohanes P. D. S. Depari; Nurul Muhayat; Aditya Rio Prabowo; Triyono
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-07

Abstract

This study aims to investigate the influence of tool rotational speed and joint configuration on the physical and mechanical properties of extruded AA6061-T6 aluminum panels joined by One-Step Double-Acting Friction Stir Welding (ODFSW), a technique that joins both panel faces simultaneously in a single pass. While previous ODFSW studies have focused exclusively on the effect of tool rotational speed in plate or hollow panel geometries using a single joint type, the comparative influence of joint configuration on ODFSW joint quality and mechanical performance has not been systematically addressed in the existing literature. Panels were welded in butt and lap configurations at tool rotational speeds of 1200, 1500, and 1800 rpm, and evaluated through macrostructural observation, microstructural analysis, Vickers microhardness testing, tensile load testing (ASTM A370), and bending testing (ISO 5173). Results showed that increasing rotational speed improved material flow, reduced surface defects, and promoted dynamic recrystallization in the stir zone, yielding a characteristic W-shaped hardness profile with minimum values in the heat-affected zone. Butt joints consistently outperformed lap joints, achieving maximum tensile load capacity of 25.3 kN and bending strength of 10.8 MPa at 1800 rpm, compared to 18.5 kN and 6.3 MPa for lap joints. Fracture occurred in open mode for butt joints and shear mode for lap joints. This work provides the first systematic comparison of butt and lap configurations under identical ODFSW parameters for extruded panels, offering new guidance for optimizing joint design in lightweight civil and structural engineering applications.

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