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All Journal Journal Of World Science Jurnal Talenta Sipil ARMADA : Jurnal Penelitian Multidisiplin
Sumarman Sumarman
Universitas Swadaya Gunung Jati, Cirebon, Indonesia
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Slab Planning Of A 5-Storey Apartment Building On Jalan Pemuda Semarang Sumarman Sumarman
Journal of World Science Vol. 4 No. 5 (2025): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v4i5.1417

Abstract

This research focuses on the design of a bidirectional reinforced concrete slab for a 5-storey apartment building located on Jalan Pemuda, Semarang, following SNI 1726:2019 standards. The objective is to compare the results of the direct design method (DDM) using Excel with ETABS v18 software, analyzing the accuracy of traditional methods in modern structural designs. The study employed a practical approach, incorporating various design parameters such as beam dimensions, span length, dead and live loads, and material strengths (f'c and fy). The results indicate that although there is a slight difference between the methods, they exhibit similar trends. The study found that increased load leads to higher moments, while larger beams and higher concrete strength reduce reinforcement requirements. However, discrepancies between the methods were observed due to rounding errors in the DDM. The research suggests refining moment calculation techniques and enhancing software tools for more accurate slab designs. The findings are essential for improving design accuracy in both academic and professional practice, particularly for earthquake-resistant structures.
Penilaian Visual & Keretakan pada Struktur Beton Bertulang (Checkpoint Pertamina Ru Vi Balongan) Tia Setia Ningsih; Lutfi Marantika; Sumarman Sumarman
ARMADA : Jurnal Penelitian Multidisiplin Vol. 4 No. 7 (2026): ARMADA : Jurnal Penelitian Multidisplin, July 2026
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi 45 Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/armada.v4i7.3098

Abstract

Perkerasan kaku pada area dengan beban lalulintas tinggi rentan mengalami keretakan yang dapatmenurunkan mutu beton selama masa pelayanan.Penelitian ini bertujuan mengevaluasi kondisi keretakan,mutu beton berdasarkan uji kuat tekan dan hammer test,serta hubungan antara kedua metode tersebut. Metodeyang digunakan adalah deskriptif kuantitatif melaluiinspeksi visual, analisis data uji kuat tekan beton tahun2023, dan hammer test tahun 2026 pada delapan titik diempat zona area parkir kendaraan berat CheckpointPertamina RU VI Balongan, Kabupaten Indramayu. Hasilpenelitian menunjukkan kuat tekan hasil hammer testsebesar 22,0–36,2 MPa atau setara K-224,33 hingga K369,13. Hanya titik A2, C1, dan C2 yang memenuhi ataumelampaui mutu rencana K-300, sedangkan titik lainnyaberada di bawah standar. Zona D merupakan area palingkritis dengan mutu beton terendah dan tingkat keretakantertinggi. Hubungan kedua hasil pengujian bersifat positiftetapi lemah dengan R² = 0,2219. Hammer test sesuaidigunakan sebagai evaluasi awal dan perlu dipadukandengan inspeksi visual serta uji kuat tekan
Pengaruh Tingkat Penambahan Fly Ash terhadap Kinerja Mekanik Beton Muhamad Syahrul; Sumarman Sumarman; Lutfi Marantica
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1363

Abstract

The increasing demand for concrete in infrastructure development leads to higher cement consumption, while cement production is a significant source of carbon dioxide emissions. The use of fly ash as a partial cement replacement offers an alternative to produce more efficient and environmentally friendly concrete. This study aims to analyze the effect of fly ash substitution on workability and compressive strength, determine the optimum technical dosage, and evaluate simple cost efficiency. The research employed a laboratory experimental method with fly ash variations of 0%, 10%, and 20% by weight of cement. Tests were conducted on slump and 14-day compressive strength using three cylindrical specimens for each variation. The 28-day compressive strength was estimated based on a 0.73 strength development factor from the 14-day results. The results show that slump decreased from 13.0 cm in normal concrete to 11.0 cm at 10% fly ash and 10.5 cm at 20% fly ash. The average 14-day compressive strengths for 0%, 10%, and 20% variations were 40.481 MPa, 40.953 MPa, and 35.858 MPa, respectively, with estimated 28-day strengths of 55.454 MPa, 56.100 MPa, and 49.120 MPa. The 10% fly ash variation produced the highest compressive strength, increasing by 1.17% compared to normal concrete. Cost analysis indicates savings of 3.60% for 10% fly ash and 7.20% for 20% fly ash. Therefore, 10% fly ash is recommended as the optimum technical proportion, while 20% fly ash is more suitable for cost efficiency but should be applied cautiously in structural applications.
Co-Authors Lutfi Marantica Lutfi Marantika Muhamad Syahrul Tia Setia Ningsih