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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur International Conference on Engineering and Technology Development (ICETD) Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Buletin Poltanesa Jurnal Inovasi Pembangunan Devotion: Journal Corner of Community Service Jurnal Ilmu Multidisplin AMMA : Jurnal Pengabdian Masyarakat International Journal of Mechanical, Electrical and Civil Engineering
Ronny Hasudungan Purba
Universitas Bandar Lampung
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Experimental Study on Cellular Lightweight Concrete (CLC) Bricks Using Gunung Sugih Sand and Foam Agent Ayatullah Farkhi; Ronny Hasudungan Purba; Titi Ariyanti
Poltanesa Vol 27 No 1 (2026): June 2026
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v27i1.3843

Abstract

The development of construction technology drives the need for lighter, more efficient, and environmentally friendly building materials. One of the developing innovations is the use of Cellular Lightweight Concrete (CLC) lightweight bricks that utilize foam agents as air cavity formers in the concrete mixture. This study aims to analyze the effect of the use of Gunung Sugih sand and variations in foam agents on the characteristics of Cellular Lightweight Concrete (CLC) lightweight bricks, especially in terms of volume weight and compressive strength. The study used an experimental method with a cube-shaped test object measuring 15 cm × 15 cm × 15 cm so that the cement requirement was 26 kg, Gunung Sugih sand 48.3 kg, water 8.8 liters, with variations in foam agents of 0.4 lt/m3, 0.6 lt/m3, 0.8 lt/m3, and 1 lt/m3. Material testing includes fine aggregate specific gravity, absorption, volume weight, mud content, and sieve analysis. Compressive strength testing was carried out at the age of 28 days using a Compression Testing Machine. The results of the study showed that the addition of foam agent had an effect on reducing the volume weight and compressive strength of CLC lightweight bricks. The volume weight and compressive strength of Cellular Lightweight Concrete (CLC) lightweight bricks for foam agent variations of 0.4 lt/m³, 0.6 lt/m³, 0.8 lt/m³, and 1 lt/m³ have met the requirements as lightweight bricks that are able to float. The compressive strength value decreases with increasing foam agent content, with values of 36.50 kg/cm² (3.58 Mpa), 27.08 kg/cm² (2.66 Mpa), 22.50 kg/cm² (2.21 Mpa), and 13.84 kg/cm² (1.36 Mpa), respectively. The optimal mixture composition is obtained at a foam agent variation of 0.4 lt/m³ because it provides the best balance between compressive strength and volume weight, so it can be recommended as the most effective composition in the Cellular Lightweight Concrete (CLC) lightweight brick mixture.  
Seismic Response of Reinforced Concrete Structures Using Pushover Analysis with Varying Number of Storeys Muhammad Ariyanto; Ronny Hasudungan Purba; Hery Riyanto
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8330

Abstract

This study evaluates the influence of vertical geometric variation on the seismic response and inter-story drift of reinforced concrete Special Moment Resisting Frame (SMRF) buildings located in the high seismic zone of Bandar Lampung. Three hypothetical 30-meter-tall models were analyzed: Model A (12 stories), Model B (10 stories), and Model C (8 stories). Nonlinear static pushover analysis was performed in accordance with SNI 1726:2019 and ATC-40 criteria. The results indicate that variations in story height significantly affect the dynamic characteristics and deformation patterns of the structures. Model A exhibits the shortest natural period (T = 1.559 s) and the largest base shear capacity (8,722 kN), but shows more limited post-yield behavior due to the short column effect. Model C produces the highest drift ratio (1.072%) as a result of the more dominant P-Delta effect. All models achieve the Life Safety (LS) performance level, with the majority of plastic hinges remaining in the Immediate Occupancy (IO) category, indicating available deformation capacity. Within the scope of this study, Model B is considered the most balanced configuration in terms of stiffness, drift, and ductility, and is therefore recommended as a balanced vertical geometric configuration for 30-meter-high buildings. 
Co-Authors A. Ikhsan Karim Aditya Mahatidanar Hidayat Andre Van Harryst Saragih Any Nurhasanah Ayatullah Farkhi Bhakti, M Aditya Wira Edward Panggabean Hery Riyanto Ibrahim, M Hamzah Inggit Anugriyya Netriza Irsyad, Alhafidz Klariza Luthfi Damara Mansur, Maulana Muhammad Ariyanto Muslikh Muslikh Mustakim Pergiansyah, Muhammad Arya Putra, M Iqbal Syah Pratama Rajiman Rajiman Rajiman Rajiman Rajiman Ramadhan, Alga Anur Sugito - Suprapto Siswosukarto Susilowati Susilowati Taufik Ramadhani Titi Ariyanti Titis Lukita Sari Widiyana, Made Dimas Wisman M Yobelita, Naomi Yulfriwini Zurhaldi, Thoriq Ilham