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All Journal IPTEK The Journal of Engineering Journal of Civil Engineering Civil Engineering Journal Jurnal Aplikasi Teknik Sipil 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Transportation Other

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Rheology Analysis of 3D Printed Geopolymer Based on High Calcium Fly Ash Tajunnisa, Yuyun; Arrafid, Rifqi Nadhif; Bayuaji, Ridho; Nurhadi, Hendro
IPTEK The Journal of Engineering Vol 10, No 3 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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.
An Experimental Study on Axial Stress-Strain Behaviour of FRP-Confined Square Lightweight Aggregate Concrete Columns Butje Alfonsius Louk Fanggi; Budi Suswanto; Yuyun Tajunnisa; Jusuf Wilson Meynerd Rafael; Jonatan Lassa; Ahmad Basshofi Habieb
Advance Sustainable Science Engineering and Technology Vol. 7 No. 1 (2025): November-January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i1.865

Abstract

This article presents the results of a research project that aimed to evaluate how the number of fiber-reinforced polymer (FRP) layers and the compressive strength of concrete affect the stress-strain behaviors of concrete columns produced from artificial lightweight aggregate with square cross-sectional shapes. Eighteen test specimens were manufactured and wrapped with glass fiber-reinforced polymer (GFRP) material. The specimens were later subjected to concentric compression for experimental evaluation. The experimental results suggest that GFRP efficiently confines square lightweight aggregate concrete columns. Furthermore, the test results indicate that adding FRP layers augments the ultimate stress and strain. Finally, the results suggest that an increase in the compressive strength of concrete leads to a corresponding increase in the ultimate stress. On the other hand, it has been observed that the ultimate strain decreases as compressive strength increases. The research findings reveal the behaviour of FRP-confined square lightweight aggregate concrete columns, which may also be utilized to formulate a new design-oriented model for these columns.
Taman Kanak-Kanak Inspiratif: Mengenalkan Siklus Air Melalui Pembelajaran Dini Tentang Pemanfaatan Air Hujan Untuk Mengurangi Banjir Dengan Menggunakan Sumur Resapan, Lokasi di Desa Dungus, Kecamatan Wungu, Kabupaten Madiun, Provinsi Jawa Timur Tatas, Tatas; Paramitha, Kharisma Keysia; Khoiri, Mohamad; Mawardi, Amalia Firdaus; Tajunnisa, Yuyun; Alam, Rizki Robbi Rahman; Ralindra, Deris Faisa; Purnamasari, Ragil; Wilujeng, Susi A; Wibowo, Yosi Noviari
Sewagati Vol 9 No 3 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i3.2450

Abstract

Untuk menanamkan pemahaman tentang lingkungan dan keberlanjutan kepada anak usia dini, pengetahuan tentang siklus air dan pengelolaan sumber daya alam menjadi sangat penting. Di kawasan perkotaan, masalah seperti kekurangan air tanah dan banjir merupakan tantangan serius. Melalui kegiatan pengabdian kepada masyarakat, solusi praktis seperti penggunaan sumur resapan dan pemanfaatan air hujan diperkenalkan. Proyek ini dilaksanakan di TK Tunas Nusantara, Madiun, yang terletak di lereng Gunung Wilis. Daerah ini dipilih karena potensinya dalam meresapkan air hujan dan padat penduduk. Diharapkan anak-anak dapat memahami pentingnya pengelolaan air hujan. Kolaborasi dengan Ikatan Alumni SMA Negeri 2 Madiun (IKASDA) juga menjadi bagian dari proyek ini, agar solusi tersebut dapat diterapkan secara lebih luas dan berkelanjutan dalam kebijakan daerah. Dengan mengintegrasikan konsep ini ke dalam kurikulum TK, kualitas pendidikan dan kesadaran lingkungan dapat meningkat. Kegiatan ini tidak hanya memberikan pengetahuan teoritis, tetapi juga pengalaman praktis kepada anak-anak tentang pentingnya pengelolaan air hujan dan sumur resapan. Hasil kegiatan ini akan disebarluaskan melalui berbagai platform, termasuk artikel ilmiah dan publikasi online, untuk menjangkau lebih banyak pihak.
Compressive Strength Performance of High-Volume Fly Ash Concrete with CaCO3 Addition Wibowo, Yosi Noviari; Tatas, Tatas; Tajunnisa, Yuyun; Mawardi, Amalia Firdaus; Zanah, Miftaqul
IPTEK The Journal of Engineering Vol 11, No 1 (2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v11i1.a22092

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% and 47% of cement content with fly ash and adding 3% 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% fly ash substitution achieved higher strength values, reaching 25.92 MPa at 28 days, compared to the 47% mix, which reached 24.68 MPa. Slump tests indicated sufficient workability, with a measured slump of 10 cm for FA37C3 and 12 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.    
An Experimental Study on Axial Stress-Strain Behaviour of FRP-Confined Square Lightweight Aggregate Concrete Columns Louk Fanggi, Butje Alfonsius; Budi Suswanto; Yuyun Tajunnisa; Jusuf Wilson Meynerd Rafael; Jonatan Lassa; Ahmad Basshofi Habieb
Advance Sustainable Science Engineering and Technology Vol. 7 No. 1 (2025): November-January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i1.865

Abstract

This article presents the results of a research project that aimed to evaluate how the number of fiber-reinforced polymer (FRP) layers and the compressive strength of concrete affect the stress-strain behaviors of concrete columns produced from artificial lightweight aggregate with square cross-sectional shapes. Eighteen test specimens were manufactured and wrapped with glass fiber-reinforced polymer (GFRP) material. The specimens were later subjected to concentric compression for experimental evaluation. The experimental results suggest that GFRP efficiently confines square lightweight aggregate concrete columns. Furthermore, the test results indicate that adding FRP layers augments the ultimate stress and strain. Finally, the results suggest that an increase in the compressive strength of concrete leads to a corresponding increase in the ultimate stress. On the other hand, it has been observed that the ultimate strain decreases as compressive strength increases. The research findings reveal the behaviour of FRP-confined square lightweight aggregate concrete columns, which may also be utilized to formulate a new design-oriented model for these columns.
Effect of Axial Load on the Seismic Performance of Steel Reinforced Concrete Beam-Column Joint Iranata, Data; Suswanto, Budi; Amalia, Aniendhita Rizki; Tajunnisa, Yuyun; Septiarsilia, Yanisfa
Civil Engineering Journal Vol. 11 No. 6 (2025): June
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-06-016

Abstract

Steel-reinforced concrete (SRC) provides numerous advantages, such as enhanced energy dissipation, ductility, stiffness, and strength, particularly in seismic performance. Several studies on the effect of axial loads on columns found that axial loads have an insignificant influence on column capacity, though they influence long-term performance. Beam-column joint elements are among the critical components that determine the seismic behavior of a structure. Inaccurate design of these joints can lead to fatal structural damage, potentially causing structural collapse. This study aimed to perform a numerical analysis of various joint configurations under cyclic and axial loads to identify models with the best seismic performance that consisted of four models using different SRC length parameters. The research used nonlinear finite element methods with the ABAQUS software, which enables detailed simulations of joint behavior, including predictions of failure mechanisms that are difficult to observe in experimental testing. The results of the analysis showed that the CS-02 model demonstrated the best seismic performance. Axial load increased the capacity in all models, improved energy dissipation in the RC model, slightly reduced dissipation in CS models, and caused different rotational behavior across models.
Pengembangan Desain Perbaikan dan Perkuatan Struktur Graving Dock Kapasitas 500 DWT di Pelabuhan Tanjung Emas Semarang Affandhie, R. Buyung Anugrah; Tajunnisa, Yuyun; Darmawan, Muhammad Sigit; Husin, Nur Achmad; Bayuaji, Ridho; Rahardjo, Ibnu Pudji; Sungkono, Sungkono; Suwandi, Suwandi; Yudoprasetyo, Kohar; Mansur, Moh. Safi’i
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.
Shear Performance of ULCC and PCC: Experimental and Numerical Insights Using DIC and FEM Tajunnisa, Yuyun; Mansur, Moh Safii; Suprobo, Priyo; Apsari, Auliagitta K.; Sutrisno, Wahyuniarsih
Civil Engineering Journal Vol. 11 No. 8 (2025): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-08-011

Abstract

This study investigates the shear behavior of reinforced concrete beams constructed with high-calcium fly ash-based Ultra-Low Carbon Concrete (ULCC) as a sustainable alternative to conventional Portland Cement Concrete (PCC). The objective is to assess ULCC’s structural performance under shear and its potential as a low-carbon substitute. Using a dry-mix method with dry activators, six beams (five ULCC, one PCC) of identical dimensions (150 × 250 × 1800 mm) were tested under four-point bending, with variations in shear reinforcement, flexural reinforcement, and shear span-to-depth (a/d) ratios. Digital Image Correlation (DIC) was employed to monitor crack propagation and strain development, while Finite Element Modeling (FEM) provided numerical validation. Results show that increasing shear reinforcement enhanced capacity by 12.05%, whereas higher (a/d) ratios decreased it by 22.63%; increased flexural reinforcement improved shear resistance by 31.27%. FEM closely matched experimental outcomes, with a load-deflection ratio of 1.01. ULCC outperformed PCC in shear capacity and exceeded ACI 318-19 predictions. The integration of DIC and FEM offers a comprehensive analysis framework, and the findings demonstrate ULCC’s viability as a structurally efficient, environmentally sustainable alternative for shear-critical applications.
Efek Variasi Jenis Pasir Terhadap Berat dan Kuat Tekan Beton Ringan Dari Agregat Kasar Ringan Buatan Louk Fanggi, Butje Alfonsius; Tajunnisa, Yuyun; Masrafat, Hazen; Meynerd Rafael, Jusuf Wilson
JURNAL TEKNIK SIPIL Vol 14, No 1 (2025): Volume 14 Nomor 1 Mei 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v14i1.44191

Abstract

Penelitian ini bertujuan untuk menilai efek dari penggunaan campuran antara pasir sungai dan pasir ringan buatan serta pasir ringan buatan yang telah dihaluskan dalam campuran beton yang terbuat dari kerikil ringan buatan. Parameter yang ditinjau adalah adalah berat dan kuat tekan beton. Delapan belas buah benda uji dengan target kuat tekan 15, 28, dan 41 MPa dibuat dan dites pada saat berumur 28 hari. Hasil penelitian ini menunjukan bahwa beton yang dibuat dengan menggunakan pasir yang merupakan campuran antara pasir sungai dan pasir ringan buatan dapat digolongkan sebagai beton ringan. Demikian juga hasil penelitian ini menunjukan bahwa berat beton yang dibuat dengan menggunakan pasir ringan buatan tanpa dicampur dengan pasir sungai memiliki berat yang jauh lebih ringan dari beton yang terbuat dari campuran antar pasir ringan buatan dengan pasir sungai tetapi memiliki kuat tekan yang hampir menyamai beton yang menggunakan campuran antara pasir ringan buatan dan pasir sungai.
Perilaku tegangan-regangan beton yang terbuat dari agregat ringan buatan yang diperkuat dengan carbon fiber reinforced polymer Louk Fanggi, Butje Alfonsius; Suswanto, Budi; Tajunnisa, Yuyun; Basshofi Habieb, Ahmad; Meynerd Rafael, Jusuf Wilson; Habibillah Asyari, Yudhistira; Rijiyawanto, Adetya; Syifaul Ummah, Galih
JURNAL TEKNIK SIPIL Vol 12, No 2 (2023): Volume 12 Nomor 2 November 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v12i2.35175

Abstract

This paper describes the findings of a research study aimed at evaluating the impact of various parameters on the stress-strain behavior of concrete composed of artificial lightweight aggregates with rectangular cross-sections. The factors that were evaluated include the number of fiber-reinforced polymer (FRP) layers, the compressive strength of the concrete, and the cross-sectional shape of the concrete. A total of twenty-two test specimens were fabricated, wrapped with Fiber Reinforced Polymer (FRP), and subjected to concentric compressive loading for experimental evaluation. The experimental findings indicate that Fiber Reinforced Polymer (FRP) demonstrates an excellent wrapping technique for lightweight concrete composed of lightweight aggregate. In addition to this, the test findings indicate a positive correlation between the number of fiber-reinforced polymer (FRP) layers employed and the resultant ultimate stress and strain shown by concrete composed of artificial lightweight aggregate. The test results additionally demonstrate a clear relationship between the rise in ultimate stress and the compressive strength of concrete, while showing an inverse relationship with the ultimate strain observed. Similarly, the test results indicate that the utilization of Fiber Reinforced Polymer (FRP) wrapping has more efficacy when applied to round cross-sectional shapes as opposed to rectangular cross-sectional shapes.
Co-Authors Affandhie, R. Buyung Anugrah Affandhie, R. Buyung Anugraha Affandhie, Raden Buyung Anugraha Ahmad Basshofi Habieb Ahmad Basshofi Habieb Alam, Rizki Robbi Rahman Alfayet, Muhamad Rifki Aniendhita Rizki Amalia Apsari, Auliagitta K. Apsari, Auliagitta Kumala Arrafid, Rifqi Nadhif Arwinda Aribah Cahyani Ashara, Khansa Fadilah Auliagitta Kumala Apsari Bambang Piscesa Basshofi Habieb, Ahmad Bayuaji, Ridho Beta Rahayuning Pratiwi Budi Suswanto Budi Suswanto Budi Suswanto Butje Alfonsius Louk Fanggi Cahyani, Arwinda Aribah Chadaffi, Muchamad Daffa Azmi, Ahmad Darmawan, Muhammad Sigit Data Iranata Data Iranata Dicky Imam Wahyudi Dicky Imam Wahyudi Dicky Imam Wahyudi Diputra, Aditya Tamateja Djoko Sulistiono Fadilah Ashara, Khansa Fikri Ghifari Fikri Ghifari Geralda Nurry Arifa Habibillah Asyari, Yudhistira Halisah, Vonny Nur Hariyanto, Ifarrel Rachmanda Hazen Masrafat Hendro Nurhadi Husin, Nur Achmad 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 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 Mohamad Khoiri Muhammad Hafiizh Imaaduddiin Muhammad Sigit Darmawan Muhammad Sigit Darmawan Muhammad Wildan Aziz Nur Achmad Husin Nur Achmad Husin Nur Achmad Husin Nurhadi, Hendro Paramitha, Kharisma Keysia Piscesa, Bambang 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 Sigit Darmawan Sigit Darmawan Sita Auliyah Rahmasari Siti Kamilia Aziz Srie Subekti Subekti, Srie Sulchan Arifin Sulchan Arifin Sungkono Karsidi Sungkono Karsidi Sungkono Sungkono Sungkono Sungkono Suprobo, Priyo Suswanto, Budi Sutrisno, Wahyuniarsih Sutrisno, Wahyuniarsih Suwandi Suwandi Suwandi Suwandi Suwandi Syifaul Ummah, Galih Tatas, Tatas Tatas, Tatas Wibowo, Yosi Noviari Wibowo, Yosi Noviari Wilujeng, Susi A Yanisfa Septiarsilia Yosi Noviari Wibowo Yudoprasetyo, Kohar Zanah, Miftaqul