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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

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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

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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.
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.