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All Journal IPTEK The Journal of Engineering Jurnal Aplikasi Teknik Sipil
Ridho Bayuaji
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering

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Material Inovatif Ramah Lingkungan: Pemanfaatan Komposit Abu Serabut Kelapa dan Fly Ash pada Pasta Semen Ridho Bayuaji; Riky Wahyu Kurniawan; Abdul Karim Yasin; Herta Ahsani Takwim; Faizah Maulidya Afifah
Jurnal Aplikasi Teknik Sipil Vol 13, No 1 (2015)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (476.538 KB) | DOI: 10.12962/j12345678.v13i1.1590

Abstract

Indonesia memiliki kekayaan material lokal yang berlimpah dan belum dimanfaatkan secara maksimal pada teknologi beton. Beton adalah material utama di bidang konstruksi. Konsep utama material beton tersusun dari bahan pengikat dan pengisi. Semen, bahan pengikat utama beton yang disorot oleh pemerhati lingkungan sebagai salah industri yang tidak ramah lingkungan oleh karena pembakaran bahan baku semen di kiln memerlukan energi sampai dengan suhu 1450o C dan keluarannya adalah limbah udara CO2. Di sisi lain, senyawa kandungan semen yang dapat dimanfaatkan dalam inovasi adalah Kalsium Hidroksida (CaOH), senyawa ini akan bereaksi dengan material pozzolan dan menghasilkan produk kekuatan dan keawetan tambahan pada beton, Kalsium Silikat Hidrat (C-S-H). Material pozzolan yang akan diteliti adalah abu serabut kelapa dan fly ash sebagai bahan pozzolan komposit pada kekuatan pasta semen dengan standar SNI-03-1974-1990 pada umur hidrasi 3 dan 7 hari. Hasil penelitian ini memberi kesimpulan bahwa komposisi optimum komposit limbah sabut kelapa dan fly ash berhasil mensubtitusi 30% semen dengan komposisi: 25% abu serabut kelapa dan 5% fly ash.
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 Darmawan; Arwinda Aribah Cahyani
IPTEK The Journal of Engineering Vol 9, No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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 Sigit Darmawan; Raden Buyung Darmawan; Ridho Bayuaji; Yuyun Tajunnisa; Indra Komara; Sita Auliyah Rahmasari
IPTEK The Journal of Engineering Vol 9, No 2 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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 Yuyun Tajunnisa; Ridho Bayuaji; Hendro Nurhadi; Beta Rahayuning Pratiwi
IPTEK The Journal of Engineering Vol 9, No 2 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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
Co-Authors Abdul Karim Yasin Arwinda Aribah Cahyani Beta Rahayuning Pratiwi Faizah Maulidya Afifah Hendro Nurhadi Herta Ahsani Takwim Indra Komara Nur Achmad Husin Raden Buyung Darmawan Riky Wahyu Kurniawan Sigit Darmawan Sigit Darmawan Sita Auliyah Rahmasari Yuyun Tajunnisa