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INVESTMENT FEASIBILITY COMPARATIVE ANALYSIS OF GREEN BUILDING AND CONVENTIONAL IN DKI JAKARTA Ramadian, Yasmin; Fuk Jin, Oei
Jurnal Infrastruktur Vol 10 No 1 (2024): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v10i1.6099

Sustainable buildings generally demonstrate a friendly environment, save energy and reduce operational costs, thus opening up significant investment opportunities in green buildings of the office property type. It is a shame that currently there are still very few office building developers who apply the green building concept, meanwhile the green building concept provides 31% greater profits than conventional buildings. This study aims to analyze the financial feasibility of four office buildings which are divided into two categories, namely category one (building 1 and Building 3) with a grade A building type and category two (building 2 and building 4) with a grade B building type. Building 1 and building 2 has received green building certification issued by GBCI. Building 2 and building 4 are buildings with a conventional concept. Calculation analysis is carried out using the Net Present Value (NPV), Internal Rate of Return (IRR) and Payback Period (PP) methods. Based on the results of the analysis, from the two categories of building types, the results showed that the NPV of each building was said to be financially feasible with an NPV ratio of 294% (category 1) and 162% (category 2). The IRR obtained exceeds the MARR value, with a comparison of 54% (category 1) and 21% (category 2). The payback period is less than the project investment period, namely 20 years, with a difference of 5 years (category 1) and 3 years (category 2). The office buildings with the highest and best NPV are Building 1 and Building 3 (category 1), so that even though the construction costs and green building design planning costs incurred are higher, in the research object of each building there are quite significant differences in NPV and IRR and It is hoped that all new construction and renovation work carried out by developers can apply the green building concept.

HIGH-DENSITY CONCRETE AS A RADIATION SHIELDING – SYSTEMATIC LITERATURE REVIEW Ranna, Prima; Fuk Jin, Oei
Jurnal Infrastruktur Vol 10 No 2 (2024): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v10i2.5960

High-density concrete (HDC) has been extensively employed as radiation shielding owing to its high density and capacity to absorb gamma rays and neutrons. The optimal average density of HDC for protecting against various types of radiation generally ranges from 2.2 g/cm³ to 3.5 g/cm³. This density may vary depending on the type of aggregate used, such as serpentine, barite, siderite, magnesite, and others. The study analyzes the use of high density concrete as a radiation protector using systematic literature review. The research method uses the PRISMA methodology with data search using the Publish or Perish (PoP) application with the keywords "High-Density Concrete," "Materials," and "Radiation Shielding" on the Scopus database. Bibliometric analysis using VOSviewer visualizes relationships between key terms in research. The results show that the average optimal density on high density concrete for radiation protectors varies, depending on the type of aggregate used.The selection of aggregates has a significant impact on the performance of concrete in radiation protectors. Aggregates such as barite, hematite, magnetite, and industrial waste (such as CRT glass and EAF barrel) are effective in enhancing radiation protection performance. Overall, the compressive strength of high-density concrete is an important factor in ensuring structural stability and effectiveness as a radiation shield. This study provides an in-depth perspective on the development of high-density concrete as radiation shielding and offers directions for future research in this field.

IMPLEMENTASI 3D PRINTING BETON DAN BAJA PADA DESAIN FABRIKASI DI SEKTOR KONSTRUKSI Prilita, Nisrina Fahriah Dea; Fuk Jin, Oei
Jurnal Teknik Sipil Vol. 18 No. 1 (2024)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v18i1.8424

The increasing need for development makes humans continue to find more efficient and faster ways. Therefore, technology is also growing rapidly and forcing all sectors to be able to keep up to date so as not to be left behind. The use of 3D Printing is one of the technologies that are beginning to be applied. This 3D Printing technology shows a significant change from conventional construction. The method used in this article is literature review, by collecting previous research literature. This study aims to determine the implementation of 3D Printing on fabrication design in construction. Data obtained from several journals discuss the implementation, advantages, and limitations of 3D Printing in technology, cost and time. Therefore, it is expected to open the views of construction stakeholders to be able to see the potential use of 3D Printing in the construction field.

Construction Supplier Selection Criteria: A Systematic Literature Review Pawallo, Rigel; Fuk Jin, Oei
Jurnal Syntax Transformation Vol 6 No 4 (2025): Jurnal Syntax Transformation
Publisher : CV. Syntax Corporation Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/jst.v6i4.1066

This research proposes a new model for further research on how to choose criteria in supplier selection for construction sector, through a literature review and analysis of the advantages and disadvantages of previously used methods. The methods used to select criteria in construction supplier selection were extracted from various scopus databases. The weaknesses and advantages of these methods were then analyzed. Based on these findings, several opportunities for improvement are proposed for further research. Finally, criteria methods for the selection of suppliers are proposed using statistical Multi-Criteria Decision Making (MCDM) methods. Direction and guidance for subsequent research to select the criteria used in supplier selection, based on the advantages and disadvantages of the decision methods used. Limitations of this study are that it is focused on the methods of criteria design in the supplier selection. This study can provide a research direction on the design of criteria for supplier selection. This study provides ongoing guidance and avenues for further research. Use method / value for working out the developmental strategy for criteria selection are provided by statistical MCDM methods in the construction supplier selection.

Penerapan Metode Pembongkaran (Demolishing) Pada Bangunan Gedung dan Daur Ulang Limbah Bongkaran: A Systematic Literature Review Wongso Suharto, Sunaryo; Fuk Jin, Oei
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1059

Abstrak Pekerjaan pembongkaran bangunan merupakan proses yang esensial dalam industri konstruksi untuk menghancurkan atau meruntuhkan struktur bangunan setelah masa manfaatnya berakhir. Proses ini melibatkan penggunaan peralatan khusus dan mematuhi prosedur hukum serta mendapatkan persetujuan pemerintah setempat. Penelitian ini menggunakan metode bibliometerik dengan menggunakan bantuan aplikasi Publish or Perish (Pop) dan VOSviewer. Dari hasil seleksi yang dilakukan dengan PoP dilakukan seleksi artikel-artikel yang relevan dan sesuai dengan penelitian yang dilakukan. Untuk mengetahui hubungan masing-masing kata kunci dalam artikel, maka diolah dengan menggunakan aplikasi VOSviewer dengan dilanjutkan seleksi lebih cermat dan teliti sehingga pembahasan tidak terlalu melebar. Artikel-artikel yang sudah dikumpulkan dijadikan bahan penitian schematic literature review ini. Tujuan dari Penelitian ini adalah untuk menjelaskan penererapan pekerjaan pembongkaran dengan beberapa metode yang masing-masing memiliki kelebihan dan kekurangannya. Selain pembahasan tentang pentingnya pekerjaan pembongkaran (demolishing) juga jelaskan terkait daur ulang dari limbah bongkaran konstruksi dan perkembangan-perkembangan yang telah dilakukan dalam pengolahan limbah hasil konstruksi dan bongkaran konstruksi. Kata kunci: pembongkaran, metode bongkaran, limbah bongkaran, daur ulang, Abstract Building demolition work is an essential process in the construction industry to destroy or demolish building structures after their useful life has ended. This process involves using special equipment and complying with legal procedures and obtaining local government approval. This research uses a bibliometric method using the Publish or Perish (PoP) and VOSviewer applications. From the results of the selection carried out with PoP, articles were selected that were relevant and in accordance with the research carried out. To find out the relationship between each keyword in the article, it is processed using the VOSviewer application, followed by more careful and thorough selection so that the discussion does not expand too much. The articles that have been collected are used as material for this schematic literature review. The aim of this research is to explain the application of demolition work using several methods, each of which has its advantages and disadvantages. Apart from discussing the importance of demolition work, it also explains the recycling of construction demolition waste and the developments that have been made in processing construction waste and construction demolition waste. Keywords: demolishing, demolishing methods, demolishing waste, recycling

IMPLEMENTASI 3D PRINTING BETON DAN BAJA PADA DESAIN FABRIKASI DI SEKTOR KONSTRUKSI Prilita, Nisrina Fahriah Dea; Fuk Jin, Oei
Jurnal Teknik Sipil Vol. 18 No. 1 (2024)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v18i1.8424

The increasing need for development makes humans continue to find more efficient and faster ways. Therefore, technology is also growing rapidly and forcing all sectors to be able to keep up to date so as not to be left behind. The use of 3D Printing is one of the technologies that are beginning to be applied. This 3D Printing technology shows a significant change from conventional construction. The method used in this article is literature review, by collecting previous research literature. This study aims to determine the implementation of 3D Printing on fabrication design in construction. Data obtained from several journals discuss the implementation, advantages, and limitations of 3D Printing in technology, cost and time. Therefore, it is expected to open the views of construction stakeholders to be able to see the potential use of 3D Printing in the construction field.

FAKTOR YANG MEMENGARUHI KEMITRAAN KONTRAKTOR DAN PERANCANG DALAM PROYEK DESIGN AND BUILD Sutowo, Achmad; Irawan, Agustinus Purna; Murtiana Sari, Endah; Fuk Jin, Oei
JURNAL TEKNIK SIPIL CENDEKIA (JTSC) Vol 7 No 1 (2026): Februari
Publisher : Departement of Civil Engineering, Universitas Winaya Mukti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51988/jtsc.v7i1.413

The government is currently encouraging readiness in government projects using the Design & Build project delivery system, as regulated in the Construction Services Law No. 7 of 2017. Design and Build (DB) from various previous literature has been proven to provide advantages compared to Design Bid Build (DBB) including speed of implementation, project risks, design changes and the absence of change orders during project implementation. This study aims to examine what factors influence the partnership of contractors and designers in design and build projects to produce good project performance including cost, quality, time, K3 and environment. The research method used in this study is a quantitative method with 50 respondents and processed through SPSS to explore respondents' perceptions, about factors that are considered to influence the partnership of contractors and designers in Design and Build (DB) projects. The respondents came from contractors and consultants who have worked on government projects with design & build project delivery. The results of this study indicate six key factors influencing contractor–designer partnerships in Design and Build projects, including relationship factors, process factors, and environmental factors, with partnership maturity acting as a moderating variable. These factors contribute to improved project performance in terms of cost, quality, time, safety, and environmental aspects. The findings provide practical insights for contractors and designers in strengthening collaboration and readiness for implementing Design and Build project delivery systems.

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