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Performance of Geopolymer Concrete Deep Beams with Variation in Shear Reinforcement Ratio

DOI : 10.5614/j.eng.technol.sci.2026.58.1.8

Rifkah ⁽¹⁾, Saloma ⁽²⁾, Siti Aisyah Nurjannah ⁽³⁾, Anis Saggaff ⁽⁴⁾

(1) Engineering Science, Doctoral Program, Faculty of Engineering, Universitas Sriwijaya, Jalan Palembang–Prabumulih KM 32, Indralaya, Ogan Ilir 30662, , Indonesia ,

(2) Departement of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Jalan Palembang–Prabumulih KM 32, Indralaya, Ogan Ilir 30662, , Indonesia ,

(3) Departement of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Jalan Palembang–Prabumulih KM 32, Indralaya, Ogan Ilir 30662, , Indonesia ,

(4) Departement of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Jalan Palembang–Prabumulih KM 32, Indralaya, Ogan Ilir 30662, , Indonesia

101-120

Abstract : 554

PDF : 253

DOI : 10.5614/j.eng.technol.sci.2026.58.1.8

DOI: https://doi.org/10.5614/j.eng.technol.sci.2026.58.1.8

The Effect of Ignition Timing on Combustion of Ammonia/Ethanol Mixtures in Spark-Assisted Compression Ignition Engine with a Sub-chamber

DOI : 10.5614/j.eng.technol.sci.2025.57.6.1

Takanobu Okada ⁽¹⁾, Mitsuhisa Ichiyanagi ⁽²⁾, Emir Yilmaz ⁽³⁾, Takashi Suzuki ⁽⁴⁾, Hikaru Shiraishi ⁽⁵⁾, Eric Le Roy Ngwompe Souop ⁽⁶⁾, Evan Widjaja ⁽⁷⁾, Jason Sutedjo ⁽⁸⁾, Christian Dennis Marcelo ⁽⁹⁾, Ferdinand Ronaldo Tjiotijono ⁽¹⁰⁾, Gabriel Jeremy Gotama ⁽¹¹⁾, Willyanto Anggono ⁽¹²⁾

(1) Postgraduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,

(2) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,

(3) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,

(4) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,

(5) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,

(6) Graduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,

(7) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,

(8) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,

(9) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,

(10) Graduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,

(11) Centre for Sustainable Energy Studies, Petra Christian University, Surabaya 60236, , Indonesia ,

(12) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia

735-746

Abstract : 1489

PDF : 646

DOI : 10.5614/j.eng.technol.sci.2025.57.6.1

DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6.1

Experimental Research on Sustained Concrete with the Partially Substitutions of GGBS, Fly ash and Silica Fume as a Cementitious Material

DOI : 10.5614/j.eng.technol.sci.2025.57.5.10

Rajasekhar Cheruvu ⁽¹⁾, B Kameswara Rao ⁽²⁾, M Achyutha Kumar Reddy ⁽³⁾

(1) Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh 522502, India ,

(2) Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh 522502, India ,

(3) Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh 522502, India

713-734

Abstract : 815

PDF : 333

DOI : 10.5614/j.eng.technol.sci.2025.57.5.10

DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.5.10

An Experimental Study on the Structural Behavior of RC Columns when Using Crumb Rubber Concrete Combined with Recycled Steel Fibers

DOI : 10.5614/j.eng.technol.sci.2026.58.3.10

Hasan A. Alasmari ⁽¹⁾

(1) Civil Engineering Department, College of Engineering, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia, Saudi Arabia

461-474

Abstract : 389

PDF : 114

DOI : 10.5614/j.eng.technol.sci.2026.58.3.10

DOI: https://doi.org/10.5614/j.eng.technol.sci.2026.58.3.10

Electroencephalogram-Based Multi-Class Driver Fatigue Detection using Power Spectral Density and Lightweight Convolutional Neural Networks

DOI : 10.5614/j.eng.technol.sci.2025.57.4.2

Wiwit Suprihatiningsih ⁽¹⁾, Dedik Romahadi ⁽²⁾, Aberham Genetu Feleke ⁽³⁾

(1) Department of Mechanical Engineering, Universitas Mercu Buana, Jalan Raya Meruya Selatan 11650, Jakarta, Indonesia ,

(2) Department of Mechanical Engineering, Universitas Mercu Buana, Jalan Raya Meruya Selatan 11650, Jakarta, Indonesia ,

(3) School of Mechanical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street 100811, China

445-457

Abstract : 1334

PDF : 431

DOI : 10.5614/j.eng.technol.sci.2025.57.4.2

DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.4.2

Sustainable Stabilization of Clay Soil with Rice Husk Ash

DOI : 10.5614/j.eng.technol.sci.2024.56.4.2

Shaimaa M. Abdulrahman ⁽¹⁾, Ghayda Yaseen Al Kindi ⁽²⁾, Elaf Abd Al–AzaI Ihsan ⁽³⁾

(1) Water Engineering and Hydraulic Facilities, Department of Civil Engineering, University of Technology/52 Alsinaa St., PO Box 35010,Baghdad, Iraq, Iraq ,

(2) Sanitary and Environmental Engineering, Department of Civil Engineering, University of Technology, 52 Alsinaa St., PO Box 35010, Baghdad, Iraq, Iraq ,

(3) Sanitary and Environmental Engineering, Department of Civil Engineering, University of Technology, 52 Alsinaa St., PO Box 35010, Baghdad, Iraq, Iraq

450-462

Abstract : 16127

PDF : 801

DOI : 10.5614/j.eng.technol.sci.2024.56.4.2

DOI: https://doi.org/10.5614/j.eng.technol.sci.2024.56.4.2