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Effect The Use of Steel Fibers (Dramix) on Reinforced Concrete Slab Ananda, Faisal; Febriani, Oni; Pribadi, Juli Ardita; Junaidi, Junaidi; Gunawan, Saroji
CSID Journal of Infrastructure Development Vol 2, No 2 (2019)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32783/csid-jid.v2i2.52

Currently concrete technology continues to grow and continue to innovate one of them using fibers. Fiber concrete has advantages over non-fiber concrete, among others: strong against the effect of shrinkage, ability to reduce crack, fire resistance, etc. In this study, concrete mix design using the procedures listed on SNI 03-2834-2000. The sample used is a cylinder with a height of 30 cm and a width of 15cm in diameter, which is used for compression and tensile testing, while the slab is 400cm x 100cm x 15cm. The fiber used is steel fiber (dramix), with the addition of 2/3 of the thickness of the slabs. The charging is done using a two-point loading. From the result of the research, it is found that the loading of non-fiber slab (0%) of the initial crack is the maximum crack that has passed the maximum crack allowed with a crack width of 1.3 mm with a loading of 1160 kg. The initial crack with the largest load is found on the 1% fiber mixed slab, with the initial crack also being a maximum crack of 0.5mm which also has exceeded the required maximum crack. In the 4% slab the initial crack of 0.1 mm is a minimal initial crack with a load greater than the load of a non-fiber (0%) slab by load1200 kg. While the maximum load on the maximum crack according to the applicable maximum crack conditions, on the 5% fiber mixed slab with a crack width of 0.32mm by loading 1250 kg .

Land Readjustment Model for Transit-Oriented Development (TOD) Projects: Generating Optimal Financial Benefits Gunawan Saroji; M. Ali Berawi; Dillan Satyagama; Mustika Sari; Roy Woodhead
Civil Engineering Journal Vol 9, No 10 (2023): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2023-09-10-012

Transit-Oriented Development (TOD) projects are increasingly recognized as vital components of sustainable urban planning, aiming to create compact, walkable, and mixed-use communities centered around high-quality public transportation systems. However, implementing TOD projects poses significant challenges, especially in land acquisition and redistribution. This research addresses these issues in the context of the MRT Jakarta project and proposes a land readjustment approach as a potential solution. The study combined qualitative and quantitative methods to compare existing and ideal land use in the TOD area and benchmark successful TOD models from different countries. A comprehensive financial analysis was performed to assess the potential financial impacts of the proposed model. The analysis reveals differences between the existing land use in the Fatmawati TOD area and the ideal TOD model, suggesting the need for adjustments to achieve better land use diversity and economic vibrancy. The financial analysis demonstrates positive feasibility for the TOD project, surpassing the minimum attractive rate of return (MARR) threshold. However, the potential value of the reserved area covers only 16% of the total land readjustment (LR) costs, indicating the necessity for further measures to enhance financial feasibility. The study proposes leveraging existing apartment buildings as temporary relocation sites, optimizing resources, and increasing overall financial viability to address substantial relocation costs. Exploring different property redistribution scenarios reveals the importance of balancing landowners' benefits with the developer's financial feasibility for a successful TOD project. Overall, this research provides valuable insights and a comprehensive framework for implementing thriving and sustainable transit-oriented communities in Jakarta. Further research and collaboration among stakeholders are essential to refine the proposed model and ensure successful TOD project implementation in the future. Doi: 10.28991/CEJ-2023-09-10-012 Full Text: PDF

Effect The Use of Steel Fibers (Dramix) on Reinforced Concrete Slab Ananda, Faisal; Febriani, Oni; Pribadi, Juli Ardita; Junaidi, Junaidi; Saroji, Gunawan
CSID Journal of Infrastructure Development Vol. 2, No. 2
Publisher : UI Scholars Hub

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

Currently concrete technology continues to grow and continue to innovate one of them using fibers. Fiber concrete has advantages over non-fiber concrete, among others: strong against the effect of shrinkage, ability to reduce crack, fire resistance, etc. In this study, concrete mix design using the procedures listed on SNI 03-2834-2000. The sample used is a cylinder with a height of 30 cm and a width of 15cm in diameter, which is used for compression and tensile testing, while the slab is 400cm x 100cm x 15cm. The fiber used is steel fiber (dramix), with the addition of 2/3 of the thickness of the slabs. The charging is done using a two-point loading. From the result of the research, it is found that the loading of non-fiber slab (0%) of the initial crack is the maximum crack that has passed the maximum crack allowed with a crack width of 1.3 mm with a loading of 1160 kg. The initial crack with the largest load is found on the 1% fiber mixed slab, with the initial crack also being a maximum crack of 0.5mm which also has exceeded the required maximum crack. In the 4% slab the initial crack of 0.1 mm is a minimal initial crack with a load greater than the load of a non-fiber (0%) slab by load1200 kg. While the maximum load on the maximum crack according to the applicable maximum crack conditions, on the 5% fiber mixed slab with a crack width of 0.32mm by loading 1250 kg .

Smart Building Rating System: A Comparative Analysis of National and International Rating Systems Hamidah, Amanah; Berawi, Mohammed Ali; Sari, Mustika; Saroji, Gunawan
CSID Journal of Infrastructure Development Vol. 8, No. 2
Publisher : UI Scholars Hub

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

Smart buildings have become a key part of the Fourth Industrial Revolution, driven by the need for efficient, sustainable, and adaptive built environments. Their importance is growing alongside Indonesia’s effort to develop smart cities. This study compares Indonesia’s national smart building certification system, established under Ministerial Regulation No. 10 of 2023, with two international systems: the European Union’s Smart Readiness Indicator (SRI) and the SmartScore certification. The analysis uses a literature review and comparative method to examine each system’s assessment criteria, scoring method, and certification tier. The findings show that Indonesia’s regulation includes six parameters, such as cybersecurity and operational management. SRI covers nine technical domains with emphasis on energy efficiency and occupant comfort. SmartScore focuses on user functionality and technological foundation. The comparison shows both overlap and variation in technical coverage, sustainability goals, and adaptability to climate and user needs. Although Indonesia’s system is comprehensive, it would benefit from closer alignment with international standards and stronger regulatory support to improve adoption and building performance. This study recommends more government incentives, better infrastructure, and stronger stakeholder education to support smart building development in Indonesia.

COMPARATIVE ANALYSIS PILE BEARING CAPACITY OF PILE FOUNDATIONS BASED ON SPT TEST RESULTS AND DYNAMIC TESTING DATA (Case Study: Construction of Halang Island Pier) Siti Rahma Nadila; Gunawan
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 4 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.21213041

The foundation is the lower structural part of a building that must be able to support the load of the structure above it. In foundation planning, the bearing capacity of the foundation can be calculated using soil investigation data and field load test data. This study aims to analyze and compare the bearing capacity of pile foundations using the empirical Mayerhof (1976) method based on N-SPT (Standard Penetration Test) data and the Hiley (1930) dynamic method based on driving record data from the Halang Island pier construction project in Rohil, Riau. The data used includes SPT test results from 3 drilling points (BH-01, BH-02, and BH-03) as well as driving record data from 40 pile driving points. The research subject consists of precast concrete piles with a diameter of 300 mm and an analysis depth of 42 m. The allowable bearing capacity (Qall) is calculated using a safety factor of 3. The analysis results show that the Mayerhof method yields a Qall value of 28.06 tons, while the Hiley method yields Qall values ranging from 15.30 to 29.93 tons. A comparison of the two methods reveals a ratio of 0.95 to 1.83 times, with a percentage difference ranging from -5.12% to 83.41%. The higher values in the Mayerhof method are influenced by the empirical correlation of N-SPT values representing soil conditions from investigations, whereas the Hiley method yields more conservative values because it accounts for the pile’s actual response during driving through energy transfer, penetration, and rebound. The research results indicate that the Mayerhof method is suitable for initial estimation of pile capacity, whereas the Hiley method is more representative in evaluating actual bearing capacity in the field.

ACCURACY ASSESSMENT OF BIM-BASED AUTODESK REVIT FOR CONCRETE AND REINFORCEMENT QUANTITY TAKE-OFF IN BRIDGE STRUCTURES Muhamad Aidil Fikri; Gunawan; Roma Dearni
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 4 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.20772573

The development of Building Information Modeling (BIM) technology has accelerated digital transformation in the construction industry, particularly in improving the efficiency and accuracy of quantity estimation processes. However, Quantity Take-Off (QTO) calculations for bridge structures are still commonly performed using conventional methods, which are susceptible to human error and require considerable time. This study aims to evaluate the accuracy of BIM-based Autodesk Revit in estimating concrete and reinforcement quantities by comparing its results with conventional calculations on the Station VII B Bridge Project in Dumai City. A quantitative comparative approach was employed through three-dimensional modeling using Autodesk Revit 2024 and conventional quantity calculations based on Detailed Engineering Design (DED) documents. The resulting quantities were analyzed using Average Error and Root Mean Square Error (RMSE) to assess the level of agreement between the two methods. The results indicate that concrete quantity estimation recorded an Average Error of 1.455% with an RMSE value of 0.712 m³, while reinforcement quantity estimation showed an Average Error of 1.765% and an RMSE value of 0.016 m³. These findings demonstrate that Autodesk Revit is capable of producing quantity estimates that are highly consistent with conventional calculations while providing greater efficiency and reducing the potential for manual calculation errors. Therefore, Autodesk Revit can be considered a reliable alternative for Quantity Take-Off applications in bridge construction projects.

ANALISIS SENTIMEN PUBLIK TERHADAP INFRASTRUKTUR DAN AMENITAS KOTA PEKANBARU MENGGUNAKAN ALGORITMA SUPPORT VECTOR MACHINE (SVM) BERBASIS DATA TWITTER Muhammad Yusri; Elvi Rahmi; Gunawan
Rabit : Jurnal Teknologi dan Sistem Informasi Univrab Vol 11 No 2 (2026): Juli
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/rabit.v11i2.8313

Infrastructure development and the provision of urban amenities are important elements in supporting the quality of life of communities in Pekanbaru City. Twitter has become an alternative platform for measuring public opinion in real time. This study aims to analyze public sentiment toward the infrastructure and amenities of Pekanbaru City using the Support Vector Machine (SVM) algorithm. The dataset consists of 3,743 tweets collected through a scraping technique using the Instant Data Scraper plugin. The analysis process includes text preprocessing, namely data cleaning, case folding, tokenization, normalization, stopword removal, and stemming. The data are then transformed using the Term Frequency–Inverse Document Frequency (TF-IDF) method for term weighting. In addition, this study implements a rule-based Named Entity Recognition (NER) approach to extract location entities from textual data. The proposed SVM model is expected to classify public sentiment effectively into positive, negative, and neutral categories and identify sentiment based on the locations mentioned in the tweets.

BIM-BASED STEEL QUANTITY TAKE-OFF EVALUATION FOR STEEL FRAME BRIDGES: A COMPARISON BETWEEN AUTODESK REVIT AND CONVENTIONAL CALCULATIONS Mutiara Ramadhanis; Gunawan; Roma Dearni
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 5 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.21485754

Building Information Modeling (BIM) has become an effective approach for improving the efficiency and accuracy of quantity take-off (QTO) in construction projects, including steel truss bridges. This study evaluates the accuracy of steel weight quantity take-off generated using Autodesk Revit 2025 by comparing it with conventional calculations based on the Detail Engineering Design (DED). The comparison was conducted on 34 steel profile groups consisting of 210 structural members. Steel weight obtained from Autodesk Revit was compared with conventional calculations using percentage difference and statistical indicators, including Mean Error (ME), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), and the Coefficient of Determination (R²). The results show that Autodesk Revit produced a total steel weight of 27,526.57 kg, while the conventional calculation yielded 27,478.92 kg, resulting in a percentage difference of only 0.17%. The statistical evaluation produced an ME of 1.40 kg, an MAE of 9.31 kg, a MAPE of 1.89%, and an R² value of 0.9996, indicating excellent agreement between the two methods. Unlike previous studies that mainly compared total quantities, this study evaluates steel weight quantity take-off at the individual profile level, providing a more detailed assessment of Autodesk Revit accuracy for steel truss bridge structures. The findings demonstrate that Autodesk Revit 2025 is a reliable and effective tool for BIM-based steel quantity take-off.

Analysis of Venture Capital Investment for Financing The Development of The Palm Oil Industry in Indonesia for Private Companies Yitro, Salvatore; Sari, Mustika; Saroji, Gunawan
CSID Journal of Infrastructure Development
Publisher : UI Scholars Hub

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Indonesia is the world's largest crude palm oil (CPO) producer, accounting for 58.04% of global output from 2018 to 2022 and generating between USD 18.2 billion and USD 28.95 billion in annual foreign exchange earnings from 2016 to 2021. The downstream sector, however, remains largely controlled by foreign markets, and private companies face restricted access to conventional bank financing due to negative campaigns against Indonesian palm oil in European markets. No prior study has examined the financial feasibility of venture capital as a financing mechanism for integrated downstream palm oil development by private companies in Indonesia. This study analysed that feasibility using the Discounted Cash Flow (DCF) method, applied to a case study of CS COMPANY, an integrated downstream facility comprising a refinery, fractionation plant, biodiesel plant, oleochemical plant, and CPKO refining and hydrogenation plant, over a 10-year investment period in accordance with OJK regulations. The WACC was 10.59%, benchmarked against specialty chemicals peers in Asian capital markets. The NPV was IDR 238,154,411,444, indicating a positive return above the cost of capital. The IRR was 12.07%, exceeding the WACC and confirming financial feasibility. Payback period analysis confirmed capital recovery within the 10-year investment period. Sensitivity analysis showed the project remains feasible under conservative assumptions. The projected market value at divestment was IDR 2,025,884,135,004, with a 30% DLOM applied per OJK Regulation Number 35/POJK.04/2020. These results confirm that venture capital is a financially viable and legally structured financing instrument for downstream palm oil development in Indonesia. The study contributes a replicable DCF framework calibrated to POJK regulations for use by investors and companies evaluating similar structures. Future research should examine alternative venture capital schemes, multi-project comparisons, and non-financial risk integration.

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

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.

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