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All Journal International Journal of Electrical and Computer Engineering Jurnal Teknik ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science KERN Rekayasa Sipil Journal of Engineering and Technological Sciences Jurnal Teknik Sipil Jurnal Inovasi Bisnis (Inovbiz) Communications in Science and Technology Jurnal Aplikasi Teknik Sipil Engineering, Mathematics and Computer Science Journal (EMACS) Journal La Multiapp Jurnal Profesi Insinyur Universitas Lampung Journal Research of Social Science, Economics, and Management Sewagati
Ridho Bayuaji
Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember
Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Public Health Social Sciences Other

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Cost Analysis of Construction Cost Planning for Landfill Site Junaedi, Nurhayati; Bayuaji, Ridho; Susilo, Alfred Jonathan
Engineering, MAthematics and Computer Science Journal (EMACS) Vol. 7 No. 3 (2025): EMACS
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/emacsjournal.v7i3.13800

Abstract

Accurate construction cost planning is essential to ensure project success, as inaccurate estimates may lead to delays, cost overruns, and reduced quality. Landfill construction, which is more complex than many other infrastructure projects, includes several components such as landfill work, leachate treatment facilities, and supporting infrastructure. The purpose of this study is to determine the major cost factors that have a major impact on the overall cost of building landfill sites.  With the aid of SPSS software, a regression analysis was carried out using cost data from six landfill projects in Java Island that were completed between 2013 and 2018.  With a Sig value of 0.000 (<0.05) and a very strong correlation (Pearson Correlation 0.991, within the 0.8–1.0 interval), the results show that landfill work (X3) significantly affects total costs (Y).  Leachate treatment facilities (X4) are another crucial element in a number of situations, but landfill work (X3) consistently represents the largest portion of construction costs, according to proportion analysis. These results demonstrate the growing significance of environmental facilities and point to landfill work as the main factor influencing landfill construction costs.  The study offers contractors and federal and local governments useful information for creating more precise cost estimates, maximizing budgetary allotments, and enhancing planning and development efficiency for landfill projects.
Penerapan Profesionalisme, Etika Profesi, dan Keselamatan dan Kesehatan kerja (K3) pada Pembangunan Jalan Tol di Pulau Jawa dengan Metode Span-by-Span dan Sistem External Post-Tension pada Struktur Box Girder Njoko, Fillbert; Husin, Nur Ahmad; Prihantono, Gentur; Bayuaji, Ridho; Suswanto, Budi
Jurnal Profesi Insinyur Universitas Lampung Vol. 6 No. 1 (2025)
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpi.v6n1.144

Abstract

Pembangunan infrastruktur memegang peranan yang sangat penting dalam mendorong pertumbuhan ekonomi pada suatu negara, tidak terlepas dari Indonesia. Salah satu bentuk infrastruktur adalah jalan tol. Pulau Jawa sebagai pulau dengan penduduk terpadat dan menjadi pusat perekonomian sangat membutuhkan pembangunan jalan tol. Dalam menghadapi tantangan kemacetan yang menghambat mobilitas, pembangunan jalan tol menjadi solusi strategis untuk memperlancar arus transportasi dan mendukung pertumbuhan ekonomi. Pada studi ini meninjau penerapan profesionalisme, etika profesi, dan Keselamatan dan Kesehatan Kerja (K3) pada sebuah proyek pembangunan jalan tol dengan metode span-by-span dengan sistem external post-tension pada struktur box girder di Pulau Jawa. Pada sisi profesionalisme dibagi menjadi beberapa tinjauan yaitu manajemen organisasi, quality control, dan metode pelaksanaan. Sisi etika profesi membahas mengenai penyelesaian dari masalah yang timbul akibat proses konstruksi. Sisi K3 membahas mengenai implementasi K3 di kantor dan di lokasi proyek. Studi ini disusun melalui pengumpulan data-data, wawancara, dan juga pengamatan visual di lokasi pembangunan jalan tol. Hasil pengamatan dan pengawasan di lapangan menunjukkan bahwa penerapan profesionalisme, etika profesi, dan keselamatan serta kesehatan kerja (K3) telah dilaksanakan dengan baik. Penerapan ini sangat penting karena berperan dalam mendukung kelancaran pelaksanaan proyek, terutama pada proyek konstruksi yang memiliki tingkat kompleksitas yang tinggi.
Evaluasi Efisiensi Embodied Carbon dari Spesifikasi Material Bangunan Hijau Wicaksono, Aris Dwi; Bayuaji, Ridho
Jurnal Profesi Insinyur Universitas Lampung Vol. 6 No. 1 (2025)
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpi.v6n1.153

Abstract

Embodied carbon, yaitu emisi karbon yang tertanam dalam proses produksi dan konstruksi material bangunan, menjadi perhatian utama dalam pembangunan rendah karbon. Sektor bangunan menyumbang 39% dari total emisi gas rumah kaca global, dengan 11% berasal dari material dan aktivitas konstruksi. Studi ini bertujuan untuk memverifikasi efisiensi embodied carbon dari spesifikasi material aktual yang digunakan dalam bangunan administrasi sektor energi, yang sejak awal dirancang dengan prinsip keberlanjutan. Penelitian ini mendukung arah kebijakan Net Zero Emission 2060 dan Permen PUPR No. 21 Tahun 2021 tentang Penilaian Kinerja Bangunan Gedung Hijau. Penelitian menggunakan pendekatan studi kasus keinsinyuran dengan metode deskriptif-kuantitatif. Data dikumpulkan melalui dokumentasi teknis proyek, observasi lapangan, dan simulasi berbasis sistem Excellence in Design for Greater Efficiencies (EDGE) App. Elemen bangunan yang dianalisis meliputi dinding, lantai, atap, dan finishing, yang seluruhnya telah menggunakan material efisien sejak awal konstruksi, seperti bata ringan AAC, keramik daur ulang, panel atap insulated, dan cat berbasis air rendah VOC. Tidak terdapat perubahan desain atau penggantian material selama proyek berlangsung. Hasil simulasi EDGE menunjukkan bahwa bangunan ini mencapai efisiensi material sebesar 83%, jauh di atas ambang batas minimal 20%. Temuan ini membuktikan bahwa strategi pemilihan material yang tepat sejak tahap desain awal mampu secara signifikan menurunkan jejak karbon bangunan. Studi ini mendukung pencapaian Tujuan Pembangunan Berkelanjutan (SDGs), penguatan indikator Environmental, Social, and Governance (ESG), serta menjadi bukti penerapan praktik keinsinyuran profesional yang berorientasi pada keberlanjutan dan pengambilan keputusan berbasis data.
Potential of Sandless Geopolymer Concrete Bricks for Soundproof Walls Masrafat, Hazen; Nurfain, Irfan; Bayuaji, Ridho; Tajunnisa, Yuyun; Alfayet, Muhamad Rifki
Rekayasa Sipil Vol. 20 No. 2 (2026): Rekayasa Sipil Vol. 20 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.02.14

Abstract

This research explores the potential of sandless geopolymer bricks for application as soundproofing wall material. In this study, fly ash was employed as the primary binder in geopolymer concrete to substitute Portland cement, thereby reducing the environmental burden associated with conventional cement production. The geopolymer mixtures were prepared using a dry-mixing approach with varying proportions of coarse aggregate and binder. Three aggregate size ranges were investigated, namely 0.1–0.3 cm, 0.3–0.5 cm, and 0.5–1.0 cm. The performance of the resulting geopolymer concrete was evaluated through compressive strength, density, and sound transmission tests. The experimental results showed that specimens with larger aggregate sizes tended to exhibit higher compressive strength and density. In contrast, improved sound absorption was mainly associated with the development of pore structures within the material. These findings suggest that sandless geopolymer bricks have potential as an environmentally friendly material for soundproofing applications.
Performance of Workability and Compressive Strength on Self-Compacting Geopolymer Concrete Based On High-Calcium Fly Ash With Addictive Admixture Yuyun Tajunnisa; Nur Achmad Husin; Sigit Darmawan; Ridho Bayuaji; Raden Buyung Anugraha; Arwinda Aribah Cahyani
IPTEK The Journal of Engineering Vol. 9 No. 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i1.a16237

Abstract

Geopolymer concrete has been developed as a replacement for conventional concrete with other pozzolan materials, which have a high silicate alumina content. Fly ash is a material that contains a high silicate alumina of 22%. The high content of Al and Si increases the compressive strength of concrete. High-calcium fly ash is abundantly found in Indonesia. However, it has not been widely used for industry or research, and this is due to the fast hardening time of concrete. Therefore, it has the potential to be developed. High-quality concrete has a low cement water factor that causes low workability in concrete. Self-compacting geopolymer concrete (SCGC) has been developed as a high-quality concrete innovation with high workability. Concrete is produced by using gravel, sand, fly ash, alkaline activator, and water materials. This study used 14 Molar levels of NaOH. The variations used were 0%, 3%, 5%, and 7% superplasticizers (SP) made from polycarboxylate. This study used a dry mixing method to overcome the setting time on concrete. The results show that the workability that can be achieved is 645mm, and the compressive strength achieved is 41.7 Mpa
Performance based design of Hospital Building in Surabaya under variety design alternative using SNI 1726-2019 – Case study: Redesign Building Muhammad Sigit Darmawan; Raden Buyung Anugraha Affandi; Ridho Bayuaji; Yuyun Tajunnisa; Indra Komara; Sita Auliyah Rahmasari
IPTEK The Journal of Engineering Vol. 9 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i2.a16231

Abstract

Nowadays, At the present time, the occurrence of regular earthquakes all over the world is turning into a significant problem. The structures that make up hospitals are among the most significant buildings in a living society because, in the event that a potentially dangerous scenario emerges, they help to serve as a caring and healing unit for the human population. A hospital building is made up of three different components: the structural component, the non-structural component, and the functional component. Each of these components can have an effect, either directly or indirectly, on the management and operation of the hospital building. Each time a natural or non-natural cause causes devastation and disaster, the globe suffers. In such cases, hospital buildings are vital in term of treating victims and injured persons, and housing those who lost their homes. Therefore, hospital facilities should be planned and constructed with enough stiffness and strength to resist disasters and serve as shelters or housing units afterward. This study analyses a hospital in area of Surabaya which built using Indonesian standard provision SNI 1726-2012. Weak structural members of the hospital are identified. The analysis determined to study the behaviour of hospital building when subjected to seismic forces using ETABS using current provision SNI 1726-2019. The investigation determined that the effect of the lateral forces under P-delta effect on the hospital building. Two different conditions have been compared, e.g., existing model and alternative configuration using dual system method to determining the recommendation for current building to resist seismic forces under new regulation. As a result, existing structure of hospital building still meet the requirements, but to fill the condition in accordance with SNI 1726-2019, some modifications need to be improved.
Workability Analysis of 3D Printing Materials for Applications in The Construction Industry Ridho Bayuaji; Hendro Nurhadi; Beta Rahayuning Pratiwi; Yuyun Tajunnisa
IPTEK The Journal of Engineering Vol. 9 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i2.a16185

Abstract

The development of 3D Printing machine technology as a printing tool that uses an additive manufacturing method system with the aim of producing a three-dimensional (3D) object or object according to the default digital design file. 3D Printing was created to facilitate construction work, with 3D Printing construction work becoming lighter because this tool saves time, and costs, and reduces the risk of work accidents. With 3D Printing, work runs quickly and avoids problems in the development process. In the last few decades, many developed countries have used 3D Printing technology in making buildings. The 3D printing process basically consists of three different stages namely, data preparation, material preparation and transfer to the printer, and the printing stage. In the data preparation stage, the components are designed as 3D CAD models, then converted to STL (Stereolithography) format and sliced with the desired layer depth. The preparation of concrete involves mixing and placing it into a container. Once fresh concrete has been placed into the container, it can be channeled smoothly through a pump-pipe-nozzle system to print self-compacting concrete filaments, which build structural components layer by layer. The material used in this 3D printing method was Portland cement where this cement is easy to find among the public. Portland cement itself is the cement that is commonly used as a basic material for making concrete, plaster, mortar, and non-specialized mortar. In addition, fly ash and silica fumes are also added as a mixture. The addition of silica fumes increases the compressive strength of concrete. Furthermore, the addition of fly ash to the concrete has the effect of reducing drying shrinkage; but reducing the compressive strength of the concrete. In this study, the author focuses on the workability of 3D Printing concrete materials, and the impact of the material was added with additional type C fly ash and silica fume, namely flowability. The result is a concrete mix design that has good flowability value to be applied to the 3D Printing method.
Role of Limestone Addition in Improving the Initial Compressive Strength of Geopolymer Concrete for Corrosive Environment Repair Arwinda Aribah Cahyani; Nur Ahmad Husin; Ridho Bayuaji; Yuyun Tajunnisa
IPTEK The Journal of Engineering Vol. 10 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i2.a20763

Abstract

Geopolymer Concrete (GC) is highly durable in corrosive environments, making it a viable material for repair. However, its initial compressive strength was below the 7 megapascals required at one-day age. Adding fine limestone (45 micrometer) can improve GC's density and early strength. This study explores the effects of adding 0 percent, 3 percent, 5 percent, and 7 percent limestone and 1 percent sucrose superplasticizer to GC 16M. The compressive strength was tested at 1, 3, 7, and 28 days, along with slump, permeability, and resistivity tests to assess the durability. The results show that adding 5 percent limestone yields the optimal GC performance for repairing corrosive environments. The compressive strengths were 15.96, 28, 43, and 67.14 megapascals at 1, 3, 7, and 28 days, with a slump of 120 millimeters. The permeability and resistivity results were 0.128 × 10^-16 square meters and 57.87 kiloohm-centimeter, indicating normal corrosion levels. These findings confirm that GC with 5 percent limestone meets the durability and strength requirements of repair materials in corrosive environments.
Rheology Analysis of 3D Printed Geopolymer Based on High Calcium Fly Ash Yuyun Tajunnisa; Ridho Bayuaji; Rifqi Nadhif Arrafid; Hendro Nurhadi
IPTEK The Journal of Engineering Vol. 10 No. 3 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i3.a21071

Abstract

The advancement of 3D concrete printing has focused on automation research in recent decades. 3D printing technology is adequate to reduce waste and improve efficiency for construction. Former research on 3D concrete printing used hydration cement based on ordinary Portland cement (OPC), which was not environmentally friendly. An alternative material to overcome problems with hydrated cement mortar is a geopolymer. Geopolymer mortar based on 3D printing is still in its infancy. Mechanical and rheological properties are the key parameters of this technology: yield stress, shear stress, and viscosity. The flow characteristics of 3D concrete printing represented the ability of material transfer along the system of the 3D printing machine. This research utilizes type C fly ash waste as the primary material for making geopolymer 3D-printed concrete. Variations of 8, 10, and 12 M of NaOH concentration were used to investigate the relationship between workability and quality of the geopolymer mortar. Workability testing of 3D concrete printing consists of several parameters: pumpability, extrudability, and buildability. Material identification, including rheology and flowability, is carried out to determine mortar specimens' pumpability, extrudability, and buildability. Several test approaches, such as slump flow, slump, shape retention, and rheometer tests using the vane shear approach method, were conducted to identify the rheological characteristics and flowability of the material. Based on testing of the material's workability, 10 M NaOH concentration variation is the most suitable material for future 3D printing material. The workability of 10 M NaOH is 177.5 mm and the the copressive strength is 25.84 Mpa. This variation meet ACI 318/318R – 14 criterion for building structure.
Pengembangan Desain Perbaikan dan Perkuatan Struktur Graving Dock Kapasitas 500 DWT di Pelabuhan Tanjung Emas Semarang R. Buyung Anugrah Affandhie; Yuyun Tajunnisa; Muhammad Sigit Darmawan; Nur Achmad Husin; Ridho Bayuaji; Ibnu Pudji Rahardjo; Sungkono Sungkono; Suwandi Suwandi; Kohar Yudoprasetyo; Moh. Safi’i Mansur
Sewagati Vol 9 No 4 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i4.210

Abstract

Graving Dock adalah sebuah tempat untuk membangun atau memperbaiki kapal. Struktur graving dock pada umumnya terdiri dari struktur dinding beton dan struktur pelat lantai beton. Struktur graving dock yang ditinjau saat ini sering mengalami kerusakan pada struktur pelat dan struktur dindingnya. Kerusakan yang terjadi pada pelat lantai dapat disebabkan karena umur dan material bangunan yang sudah lebih dari 50 tahun, sedangkan pada dinding graving dock dapat disebabkan karena terbuat dari pasangan bata yang ditunjang sloof yang berada di atas fondasi batu kali tetapi tidak menjadi satu kesatuan dengan fondasi tersebut. Hal itu berpotensi menyebabkan kerusakan berat dan dapat mengganggu aktivitas perbaikan kapal di graving dock. Untuk menghindari kerusakan berat, pada pengabdian masyarakat ini dilakukan perbaikan dan perkuatan pada struktur pelat lantai dan dinding graving dock. Langkah awal yang dilakukan adalah survei pendahuluan bertujuan untuk memperoleh data kondisi saat ini. Selanjutnya dilakukan analisis dan evaluasi terhadap struktur graving dock yang ada saat ini. Langkah terakhir yang dilakukan adalah desain perbaikan graving dock. Hasil desain perbaikan, didapatkan dimensi dan penulangan yaitu struktur dinding tebal 30 cm dengan tulangan D16-150, struktur dinding miring tebal 50 cm dengan tulangan D19-150, pelat lantai tengah tebal 60 cm dengan tulangan D19-150, dan pelat lantai tepi tebal 45 cm dengan tulangan D19-150.
Co-Authors ABM Diah Ade Asmi Agus Imam Sonhaji Agus Imam Sonhaji, Agus Imam Akhmad F. Alhikami Akhmad Faruq Alhikami Alfayet, Muhamad Rifki Amaliya Rasyida Ardiansyah, Giri Teguh Arwinda Aribah Cahyani Beta Rahayuning Pratiwi Budi Suswanto Darmawan, Muhammad Sigit Deris Faisa Ralindra Dicky Imam Wahyudi Dicky Imam Wahyudi Dora Melati Nurita Sandi Dwiki Pratama Putra Dwiky Nugraha Franky Kusuma Gunawan Nugroho Hamzah Fansuri Hazen Masrafat Hendra Cordova Hendro Nurhadi Hidayati, Ririn Eva Hudiyo Firmanto, Hudiyo Husin, Nur Ahmad Ibnu Pudji Rahardjo Ibnu Pudji Rahardjo Indarto Indarto Indarto Indarto Indra Komara Iqbal, Rendy Muhamad Januarti Jaya Ekaputri Joko Waluyo Junaedi, Nurhayati Kohar Yudoprasetyo M Sigit Darmawan MF Nuruddin Moh. Safi’i Mansur Muhammad Sigit Darmawan Muhammad Sigit Darmawan Muhammad Sigit Darmawan Njoko, Fillbert Nur Achmad Husin Nur Achmad Husin Nur Achmad Husin Nur Ahmad Husin Nurfain, Irfan Priantama, Dimas Bayu Prihantono, Gentur R. Buyung Anugrah Affandhie R. Buyung Anugraha Affandhie R. Buyung Anugraha Affandhie R.Y. Perry Burhan, R.Y. Perry Raden Buyung Anugraha Raden Buyung Anugraha Affandi Reny Nadlifatin Ria Asih Aryani Soemitro Ridho Hantoro Rifqi Nadhif Arrafid Ruri Agung Wahyuono SATRIYAS ILYAS Sigit Darmawan Silvana Dwi Nurherdiana Sita Auliyah Rahmasari Srie Subekti Subaer - Subekti, Srie Sulchan Arifin Sulchan Arifin Sungkono Karsidi Sungkono Karsidi Sungkono Sungkono Supriadi, Warih Susilo, Alfred Jonathan Suwandi Suwandi Totok R. Biyanto Totok R. Biyanto Totok R. Biyanto Totok R. Biyanto TR Biyanto Vita Ratnasari Wicaksono, Aris Dwi Wicaksono, Sigit Tri Yerry Sutatio Yuga Prayna Pawitra Yuyun Tajunnisa