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All Journal Rekayasa Sipil JURNAL SIPIL SAINS Civil Engineering Journal Astonjadro Borneo Engineering: Jurnal Teknik Sipil JAIM (Jurnal Abdi Masyarakat) Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil SELODANG MAYANG Lowland Technology International Journal La Multiapp Jurnal Talenta Sipil Indonesian Journal of Fundamental Sciences Journal of Applied Civil and Environmental Engineering (JACEE) Structures, Infrastructure, Planning, Implementation, and Legislation
Erniati Bachtiar
Universitas Fajar
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Journal : Structures, Infrastructure, Planning, Implementation, and Legislation

 1 
The Impact of Material Price Fluctuation on Cost Overruns in National Toll Road Infrastructure Projects Rudi; Vina Levia Budiman; Masdiana; Nur Khaerat Nur; Erniati Bachtiar
Structures, Infrastructure, Planning, Implementation, and Legislation Vol. 1 No. 2 (2025): October, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/sipil.v1i2.314

Abstract

Fluctuations in construction material prices significantly challenge infrastructure project management, especially in Indonesia’s national toll road sector from 2023 to 2025. Employing a quantitative approach with purposive sampling of National Strategic Toll Road Projects (PSN), this study investigates the impact of price volatility for core materials (cement, steel, and asphalt) on project cost overruns. The analysis utilizes dual-source data: secondary data from the official Wholesale Price Index (WPI) published by the Central Statistics Agency (BPS) and budget realization data from the Ministry of Public Works and Housing (PUPR)/BPJT. Advanced analytical methods, including Structural Equation Modeling (SEM) to establish causal relationships and Least Squares Support Vector Machine (LSSVM) to develop a predictive model, reveal strong positive correlations between material price fluctuations and cost increases, with steel price volatility having the most pronounced effect. Empirical findings show cement prices increased by approximately 12.5% and steel by 15.3%, leading to cost overruns contributing up to 21% additional project costs. High reliability (Cronbach’s alpha 0.89) and data validity support these findings. Practical implications include the need for real-time price monitoring, adaptive budgeting with contingency funds of 20–25%, flexible procurement contracts, and digital tools like Building Information Modeling for risk mitigation. This research bridges macroeconomic volatility and engineering practice by offering an actionable predictive framework to support fiscal integrity and timely project delivery. Further research should incorporate socio-political variables and enhance predictive analytics using big data.
Critical Performance Assessment of Precast Concrete Quality in High-Rise Buildings Compliance with National Standards Muhammad Hunsan; Erny; Erniati Bachtiar; Arman Setiawan; Rita Hardianti Aris
Structures, Infrastructure, Planning, Implementation, and Legislation Vol. 1 No. 2 (2025): October, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/sipil.v1i2.315

Abstract

This study critically assesses Precast Concrete (PC) quality compliance in Indonesian high-rise buildings by comparing material strength, geometric tolerances, and seismic connection performance against SNI requirements. Using five years of official inspection data (2020–2025) from 120 certified lots (BSN/PUPR), the analysis identifies recurring non-compliance, including a 15.0% compressive strength defect rate, 8.5% AOQ, and 17.1% reinforcement cover deficiencies that may compromise structural durability. Wet joints exhibit better seismic resilience (μ = 4.5) than dry joints (μ = 3.8), though dry joints show pinching effects that reduce energy dissipation.Key root causes include moisture instability, admixture dosing errors, and precision gaps, revealing a persistent mismatch between documented procedures and actual statistical quality control. The study recommends implementing automated QC systems and strengthening SNI certification through more rigorous statistical approaches. Future work should integrate machine-learning predictive models using real-time factory data to enhance defect prevention.
Comparative Analysis of Fatal Construction Accident Types Revealing Safety Performance in the Services Sector Anindya Monika Putri; A. Ferina Herbourina Bonita; Vina Levia Budiman; Andi Rista Irawati Tanrasula; Erniati Bachtiar
Structures, Infrastructure, Planning, Implementation, and Legislation Vol. 1 No. 2 (2025): October, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/sipil.v1i2.317

Abstract

Occupational safety remains a critical challenge in the Indonesian construction sector, contributing to over one-third of all national work-related fatalities. This study performs a rigorous quantitative analysis using a census of 102 official fatal accident records from BPJS Ketenagakerjaan and the Ministry of PUPR (2018–2023).  The findings confirm that Falls from Height are the dominant cause of fatalities (41.2%), followed by material strikes. Statistical modeling (Logistic Regression) identified that short work tenure (< 5 years, OR ≈ 2.5) and safety harness non-compliance (OR ≈ 3.0) are the strongest predictors of this high-risk accident type.  The study indicates a systemic failure in enforcing OHS protocols, particularly concerning work-at-height hazards and Personal Protective Equipment (PPE) compliance. The novelty lies in the systematic use of national fatality census data coupled with risk modeling to empirically validate specific behavioral and demographic factors contributing to the most prevalent fatality type in Indonesia.  This work provides a strong empirical basis for developing evidence-based OHS policies, emphasizing the urgent need for stringent regulatory enforcement and targeted safety training for vulnerable worker groups.
Sustainable Utilization of Local Natural Aggregates for Eco-Friendly Concrete Production: Integrating Geospatial and Regional Economic Data in West Java, South Sumatra, and South Sulawesi Anugrah; Erny; Erniati Bachtiar; Arman Setiawan; Rita Hardianti Aris
Structures, Infrastructure, Planning, Implementation, and Legislation Vol. 1 No. 2 (2025): October, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/sipil.v1i2.323

Abstract

This study tackles the persistent environmental and economic complexities associated with conventional concrete manufacturing by establishing a novel sustainable production framework. This framework strategically integrates geospatial data on local aggregate reserves with key regional economic variables, focusing specifically on West Java, South Sumatra, and South Sulawesi as representative study areas in Indonesia. Leveraging Geographic Information System (GIS) technology and official statistics from the Geospatial Information Agency (BIG), alongside regional economic indices from the Central Statistics Agency (BPS), the investigation meticulously analyzed the spatial arrangement of high-quality aggregates, material price fluctuations, and crucial logistics expenditures. A multiple linear regression model was employed for quantitative analysis, which decisively revealed that aggregate pricing (=0.62, p < 0.001) and logistics expenses (=0.31, p < 0.05) are the predominant cost drivers in sustainable concrete production, whereas aggregate technical quality contributes a smaller, measurable influence (=0.09, p > 0.05). The exceptional coefficient of determination (R2=0.89) substantiates the model's predictive power and its practical utility for cost management and optimization within eco-friendly concrete systems. Ultimately, this research emphasizes the critical necessity of converging environmental, technical, and economic data for effective resource stewardship. It also proposes future scholarly endeavors should focus on integrating real-time monitoring and advanced digital supply chain technologies to further bolster the sustainability credentials of the domestic construction industry.
Co-Authors A. Ferina Herbourina Bonita Amar Ma’ruf Hamri Andi Ibrahim Yunus Andi Muhammad Nur Padli Andi Muhammad Nurpadli Andi Nuraliyah Andi Rista Irawati Tanrasula Anindya Monika Putri Anugrah Anugrah . Arbain Tata Arman Setiawan Arman Setiawan Arpin Tari Asrar Asrar Asri Mulya Setiawan Azhari Zahlim Chaeril Anwar Chaeruel, M Chaerul, Muh Clara Nita Fitriany Desi, Natsar Erny Farida Isroani Faris Jumawan, Faris Fatmawati Rachim Firman Paledung Fudlailah, Pratiwi Gusty, Sri Harun, A. Yusuf Herwina Rahayu Putri Imran T, Muh. Ismail Marzuki Lismawati, Lismawati M. Iqbal Mahmud Mahmud Masdiana Meldawati Artayani Muh Arief Muzakkir Muh Yusuf Harun, A Muhammad Chaerul Muhammad Hunsan Muhammad Ihsan Muhammad Yusuf Ali Mulyadi Mulyadi Musahir, Fajar Mustaan, Mustaan Nur Khaerat Nur Nur Zaman POPPY INDRAYANI, POPPY Popy Indrayani Popy Indrayani Putu Artawan, I Rachim, Fatmawaty Rahman, Muhammad Junaedy Risamawarni Risamawarni Rita Hardianti Aris Rita Hardianti Aris Ritnawati Makbul Rudi Rudi Selfina Gala Setiawan, Asri Mulya Sri Gusty Takwin Takwin Vina Levia Budiman Violana Tandioga Yudha Alam , Gigih Yunus, Andi Ibrahim Yusuf Harun, A Zaman, Nur Zulharnah Hasan Ramli