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All Journal Jurnal Ilmiah Desain & Konstruksi Jurnal Teknik Sipil SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi Civil Engineering Journal FROPIL (Forum Profesional Teknik Sipil) JURNAL KAJIAN TEKNIK SIPIL Jurnal Infrastruktur G-Tech : Jurnal Teknologi Terapan Jurnal Teknik Gradien Indonesian Community Journal Jurnal Pengabdian Masyarakat Bhinneka Jurnal Pengabdian Masyarakat Bangsa Jurnal Penelitian Multidisiplin Bangsa Jurnal Teknologi dan Sains Modern
Miskar Maini
Institut Teknologi Sumatera
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Innovative Approaches to Post-Earthquake Reconstruction Material Evaluation for Healthy Simple Houses Junita Eka Susanti; Miskar Maini; Elian Zhafira
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8007

Abstract

Post-earthquake housing reconstruction is essential for accelerating community recovery and ensuring safer living conditions in disaster-prone regions. This study evaluates the potential of recycled rubble sand from demolished masonry walls as an acceptable aggregate replacement in mortar production. It explores its integration into the development of a Healthy Simple House (HSH) model for post-disaster housing reconstruction. Laboratory experiments were conducted in accordance with PUBI-1982 and SII 0052-80 standards to characterize material properties and assess mechanical performance. The results indicate that rubble sand exhibits a well-graded particle distribution, stable density values (SSD 2.48 g/cm³, bulk 2.35 g/cm³, apparent 2.71 g/cm³), and moderate water absorption (5.62%), with slight organic contamination. Compressive strength tests showed that mortars with a 1:3 cement-to-sand ratio reached approximately 24 MPa at 28 days, meeting structural requirements, while higher rubble proportions reduced strength, restricting their application to non-structural components. The incorporation of rubble sand into the HSH model highlights its role in sustainable reconstruction by reducing reliance on natural resources while ensuring safe, healthy, and affordable housing. The study concludes that recycled rubble sand can be effectively utilized as a partial aggregate substitute, providing practical guidance for post-disaster housing programs and informing policy development for environmentally friendly and resilient reconstruction strategies that contribute to community resilience.
Flow Resistance Estimation Using the Empirical Chezy Method in Sediment-Laden Flow Miskar Maini; Junita Eka Susanti
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8057

Abstract

Hydraulic resistance, represented by the Chezy coefficient, is crucial in estimating flow discharge in open channels and serves as a fundamental parameter in designing hydraulic structures such as irrigation canals and river control facilities. This study investigates the behavior of the Chezy coefficient under non-sediment-laden (NSL) and sediment-laden (SL) flow conditions through controlled laboratory experiments using coarse sand, complemented by comparative analysis with data from irrigation channels and natural rivers. The results show that the ratio of mean velocity to shear velocity (U/u*) exhibits a robust correlation with discharge (Q) under both flow conditions, with a determination coefficient (R²) exceeding 0.96. The hydraulic radius (Rh) also shows a strong linear relationship with discharge (R ≈ 0.98), confirming its role in the empirical estimation of the Chezy coefficient (C). The value of C increases with higher velocity ratios but tends to be slightly lower under SL conditions due to increased resistance from suspended sediments. The Mean Absolute Error (MAE) value of 0.02 indicates a slight difference between NSL and SL conditions. These findings suggest that the empirical method is unreliable and exhibits significant differences in estimating Chezy under sediment-laden flow. It highlights the need for supplementary approaches to improve irrigation and river management design accuracy.
Co-Authors Afenda, Gerald Samuel Afriana, Velia Dwi Agatha Padma Laksitaningtyas, Agatha Padma Ahmad Yudi Akbar, Muhammad Irfan Khairullah Al Farisi, Muhammad Ilham Al Thoriq, Alif Muhammad Alexander, Rionaldo Alfadla, Moza Nayla Alfinna Mahya Ummati, Alfinna Mahya Andena , Rahma Andry Yuliyanto Angelica, Sabrina Anton Saputra, Anton Anwar, Ilyas Aprilia, Ayu Sinta Apriwelni, Siska Arman, Renata Ulima Aulia Hidayat Burhamidar Aulia, Khoiria Artha Ayu Sinta Aprilia Ayudia Hardiyani Kiranaratri Ayudia Hardiyani Kiranaratri Berliantine, Febi Getzi Br Purba , Angel Permata Sari Budi Ribowo, Anggarani Cahyo Agung Saputra Cibro, Dantomi Djoko Legono Ekaputra, Reza Asriandi Elian Zhafira Erdina Tyagita Utami Fadillah Sabri Fathurrahman, Arif Fitriana, Indri Rahmandhani Furqan Ali Yusuf Galih Rio Prayogi Gulo, Fransiscus Yana Julio Hakim, Nasywa Naura Fitriani Ilham, Rahmat Arifin Ilpandari Ilpandari Ilpandari, Ilpandari Istiarto Julita Hayati Junita Eka Susanti Khanza, Ayu Kamila Kironoto, Bambang A. M Gilang Indra Mardika Marina, Bernaditha Catur Mashuri Mashuri Mashuri Matondang, Nikmah Azhima Putri Michael Michael Mukhlis, Sasy Gisda Nadi, Abi Berkah Nadi, Muhammad Abi Berkah Nurfauziah, Haliza Nurjanah, Suci P Kirtinanda Pangestu, Bagus Prayogi Pratama, Krisna Putra, M. Ikhsan Wisna Putra, Satria Pratama Putri Ayu Dwiyana Rahardjo, Adam P. Rahmat Kurniawan Rahmat Kurniawan Ramadhan , Farhan Nur Ramadhan, Windu Revi Ramadhani, Mutia Reza Asriandi Ekaputra Sambuaga, Arif Rachman Saragih, Yesika Febyanti Sari , Tri Nilam Selviana, Lulu Sihombing, Tera Melya Patrice Simatupang, Partogi Josua Gembira Sitepu, Arif Rahman Hakim Siti Rahma Syafira, Alifia Angel Joane Syahidus Syuhada Syaputra, M. Raihan Tambunan, Hermon Frederik Tarigan, Biela Thoricelly Br Utami, Erdina Tyagita Yusri , Muhammad Yusuf, Furqan Ali Zhafira, Elian