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All Journal IPTEK The Journal of Engineering Rekayasa Sipil Journal of Civil Engineering Civil Engineering Journal Jurnal Aplikasi Teknik Sipil Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Sewagati Jurnal Teknik Sipil Advance Sustainable Science, Engineering and Technology (ASSET)
Yuyun Tajunnisa
Departemen Teknik Infrastruktur Sipil, Fakultas Vokasi, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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NUMERICAL INVESTIGATION OF GEOPOLYMER REINFORCED CONCRETE BEAMS UNDER FLEXURAL LOADING USING 3DNLFEA Yosi Noviari Wibowo; Bambang Piscesa; Yuyun Tajunnisa
Journal of Civil Engineering Vol. 37 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.7628

Abstract

This paper deals with numerical modeling of geopolymer reinforced concrete loaded under flexure using nonlinear finite element analysis. The modeled specimen was obtained from the existing literature and is tested under the four-point bending load. The numerical simulation uses an in-house limited element package called 3D-NLFEA, which utilizes ordinary concrete's multi-surface plasticity model. Since the concrete constitutive model used is for ordinary Portland cement, adjusting the input parameter is required to predict the behavior of geopolymer reinforced concrete. The focus on the discussion was limited to the modeling of the specimen, the moment-curvature result, and the crack pattern between the numerical model and the available experimental test. The simulation found that the predicted moment-curvature relationship using the 3D-NLFEA package was 1.3 to 2.4 % lower than the test result. The crack pattern was controlled by flexure, which was observed in the experimental test and numerical simulation. The predicted crack lengths for modeled beam using 3D-NLFEA were within the minimum and maximum measured crack lengths from the test result.
NUMERICAL ANALYSIS STUDY OF THE EFFECT GEOPOLYMER CONCRETE COMPRESSIVE STRENGTH ON DUCTILITY OF REINFORCED CONCRETE BEAMS Muhammad Wildan Aziz; Priyo Suprobo; Yuyun Tajunnisa
Journal of Civil Engineering Vol. 37 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.7629

Abstract

Geopolymer concrete that has polymer formwork is very likely to be used as reinforced concrete material with several advantages. The advantages of geopolymer concrete when compared to portland cement concrete are: resistant to acidic environments (corrosion resistance), better bond strength of reinforcement with concrete material, stable at high temperatures, higher fracture energy. Previous experimental studies found that the tensile strength, bond strength, and fracture energy of geopolymer concrete were better, leading to the hypothesis that the ductility value of geopolymer concrete was better than portland cement concrete. The identification of ductility values based on the compressive strength of concrete will be carried out in research using the finite element method using the 3D ATENA program. Several specimens with compressive strength of 25 MPa, 30 MPa, 35 MPa, 40 MPa, and 45 MPa were compared with their ductility values. The results showed that the 25 MPa specimen had the highest ductility value with 5.33, while the lowest ductility value is 45 MPa specimen with 3.39.
Tensile Performance of Inter-Module Connections for Modular Steel Buildings Using Finite Element Method Umi Arifatus Shoifah; Nur Ahmad Husin; Yuyun Tajunnisa
IPTEK The Journal of Engineering Vol. 11 No. 3 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

Steel modular construction is an innovative technology that uses prefabricated volumetric module unitsmanufactured in a factory and assembled on site via inter-module connections. However, this system's applicationin high-rise buildings is limited because the structural performance is strongly influenced by the inter-moduleconnection mechanism. This technology uses a translational spring model to transfer loads between modules throughinter-module connections. This approach uses threaded steel rod components, connection plates, shear keys, shearplates, and tie plates. This research aims to determine the maximum tensile capacity of the connection. It also aimsto study stress distribution due to tensile forces and failure modes in vertical modular connections. This researchuses the finite element method (FEM) to perform numerical analysis by applying monotonic loads. Simulation resultsindicate that the connection's maximum tensile capacity is 307.48 kN, distributed among two rods with capacities of153.74 kN each at a displacement of 23.2 mm. The rod undergoes elastic deformation up to Fy = 900 MPa, followedby a plastic phase up to nearly Fu = 1,100 MPa, causing permanent strain and necking. Tensile failure occurred dueto plasticity and necking conditions.
Compressive Strength Performance of High-Volume Fly Ash Concrete with CaCO3 Addition Wibowo, Yosi Noviari; Tatas; Tajunnisa, Yuyun; Mawardi, Amalia Firdaus; Zanah, Miftaqul
IPTEK The Journal of Engineering Vol. 11 No. 1 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

This study investigates the compressive strength performance of High-Volume Fly Ash (HVFA) concrete with added CaCO3 as a sustainable alternative to Ordinary Portland Cement (OPC) for infrastructure applications. The experimental research replaces a significant portion of cement with fly ash—a byproduct of coal combustion—aiming to reduce greenhouse gas emissions associated with concrete production. Two HVFA concrete mixtures were developed, substituting 37 percent and 47 percent of cement content with fly ash and adding 3 percent CaCO3 to enhance mechanical properties. Material characterization, including XRF and XRD analysis, confirmed the suitability of fly ash for concrete production based on ASTM C618-19 standards. Aggregate gradation, moisture content, and specific gravity tests were conducted to optimize the mix design. Compressive strength tests were performed at 7, 14, and 28 days, showing that HVFA concrete with 37 percent fly ash substitution achieved higher strength values, reaching 25.92 megapascals at 28 days, compared to the 47 percent mix, which reached 24.68 megapascals. Slump tests indicated sufficient workability, with a measured slump of 10 centimeters for FA37C3 and 12 centimeters for FA47C3. These findings suggest that HVFA concrete with moderate fly ash substitution, complemented by CaCO3 addition, can achieve compressive strength and workability comparable to OPC, supporting the development of environmentally friendly concrete solutions.
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.
Co-Authors Affandhie, R. Buyung Anugrah Affandhie, R. Buyung Anugraha Affandhie, Raden Buyung Anugraha Alam, Rizki Robbi Rahman Alfayet, Muhamad Rifki Aniendhita Rizki Amalia Apsari, Auliagitta K. Apsari, Auliagitta Kumala Arifa, Geralda Nurry Arrafid, Rifqi Nadhif Arwinda Aribah Cahyani Ashara, Khansa Fadilah Auliagitta Kumala Apsari Auliagitta Kumala Apsari Bambang Piscesa Bayuaji, Ridho Bayuaji, Ridho Beta Rahayuning Pratiwi Budi Suswanto Butje Alfonsius Louk Fanggi Cahyani, Arwinda Aribah Cahyani, Arwinda Aribah Chadaffi, Muchamad Daffa Azmi, Ahmad Darmawan, Muhammad Sigit Data Iranata Dicky Imam Wahyudi Dicky Imam Wahyudi Dicky Imam Wahyudi Dinar, Bala Arizalu Putra Diputra, Aditya Tamateja Djoko Sulistiono Fadilah Ashara, Khansa Fikri Ghifari Fikri Ghifari Geralda Nurry Arifa Habibillah Asyari, Yudhistira Habieb, Ahmad Basshofi Halisah, Vonny Nur Hariyanto, Ifarrel Rachmanda Hazen Masrafat Hendro Nurhadi Husin, Nur Achmad Husin, Nur Ahmad Husin, Nur Ahmad Ibnu Pudji Rahardjo Ibnu Pudji Rahardjo Ibnu Pudji Raharjo Indra Komara Indra Komara, Indra Jonatan Lassa Jonatan Lassa Jusuf Wilson Meynerd Rafael Jusuf Wilson Meynerd Rafael Khansa Fadilah Ashara Khoiri, Mohamad Kuntjoro Kusbiantoro, Andri Louk Fanggi, Butje Alfonsius M. Faishal Darmawan Machsus Machsus Mansur, Moh Safii MANSUR, MOH. SAFI'I Mansur, Moh. Safi’i Masiran, Hidajat Sugihardjo Mawardi, Amalia Firdaus Meynerd Rafael, Jusuf Wilson Mitsuhiro Shigeishi Mochammad Ahdian Wildan Nafi Moh. Safi’i Mansur Mohamad Khoiri Muhammad Hafiizh Imaaduddiin Muhammad Sigit Darmawan Muhammad Sigit Darmawan Muhammad Wildan Aziz Muhammad Wildan Aziz Nur Achmad Husin Nur Achmad Husin Nur Achmad Husin Nur Ahmad Husin Nurfain, Irfan Nurhadi, Hendro Paramitha, Kharisma Keysia Paramitha, Kharisma Keysia Piscesa, Bambang Piscesa, Bambang Pratiwi, Wiwik Dwi Priyo Suprobo Priyo Suprobo Purnamasari, Ragil R. Buyung Anugraha Affandhie R. Buyung Anugraha Affandhie Raden Buyung Darmawan Rahardjo, Ibnu Pudji Ralindra, Deris Faisa Ramadhaniawan, Virdy Ridho Bayuaji Ridho Bayuaji Rijiyawanto, Adetya Shigeishi, Mitsuhiro Shoifah, Umi Arifatus Sigit Darmawan Sigit Darmawan Siswahyudianto Sita Auliyah Rahmasari Siti Kamilia Aziz Srie Subekti Subekti, Srie Sulchan Arifin Sulchan Arifin Sungkono Karsidi Sungkono Karsidi Sungkono Sungkono Sungkono Sungkono Suprobo, Priyo Sutrisno, Wahyuniarsih Sutrisno, Wahyuniarsih Suwandi Suwandi Suwandi Suwandi Suwandi Syifaul Ummah, Galih Tatas Tatas, Tatas Tatas, Tatas Umi Arifatus Shoifah Ummah, Galih Syifa’ul Wahyuniarsih Sutrisno Wibowo, Yosi Noviari Wibowo, Yosi Noviari Wilujeng, Susi A Yanisfa Septiarsilia Yosi Noviari Wibowo Yosi Noviari Wibowo Yudoprasetyo, Kohar Zanah, Miftaqul Zanah, Miftaqul