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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Teknik Jurnal Reka Lingkungan FROPIL (Forum Profesional Teknik Sipil) Research Review: Jurnal Ilmiah Multidisiplin Jurnal Sains dan Teknologi Tadulako Nanggroe: Journal Of Scholarly Service Nanggroe: Journal of Scholarly Service
Kasmat Saleh Nur
Universitas Negeri Gorontalo
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Pengaruh Penempatan Tangga Terhadap Eksentrisitas Bangunan Gedung 5 Lantai (Studi Kasus: Gedung Rawat Inap RSUD dr. Hasri Ainun Habibie) Sarwan Ahmad; Kasmat Saleh Nur; Mirzan Gani
Research Review: Jurnal Ilmiah Multidisiplin Vol. 4 No. 2 (2025): Research Review: Jurnal Ilmiah Multidisiplin (Agustus 2025 - Januari 2026)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v4i2.168

Abstract

One vital factor in designing earthquake-resistant structures is the torsional moment generated by eccentricity, or the distance between the center of mass and the center of rigidity. Thus, the eccentricity value needs to be minimized to reduce the resulting torsion. This study aimed to analyze the effect of variations in staircase placement on eccentricity, using the Inpatient Building at RSUD (Regional General Hospital) Dr. Hasri Ainun Habibie, Gorontalo, as a case study. Modeling was performed on seven variations of stair placement, with placement 1 representing the existing condition using shear walls. The shear walls were then removed to assess the structural effectiveness of the stair placement changes. The analysis results indicated that even without shear walls, eccentricity values were lower than those obtained for placement 1 (the existing), namely for placements 6 and 7. The smallest eccentricity value was discovered in placement 7 with a value of 0.76%, where the stairs were symmetrical about the X and Y axes. Conversely, the largest eccentricity value was discovered in placement 4 with a value of 10.55%, where the stairs were positioned close together. These differences confirmed that the staircase placement configuration significantly affected the building’s eccentricity.
Analisis Variasi Abu Batu sebagai Substitusi Parsial Agregat Halus Terhadap Kuat Tekan Beton Self Compacting Concrete (SCC) I Made Karya Jurdiawan; Kasmat Saleh Nur; Sartika Dewi Usman
Research Review: Jurnal Ilmiah Multidisiplin Vol. 5 No. 1 (2026): Research Review: Jurnal Ilmiah Multidisiplin (Februari 2026 - Juli 2026)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v5i1.304

Abstract

Self-Compacting Concrete (SCC) is designed to flow and consolidate under its own weight without mechanical vibration while maintaining high workability. The properties of SCC are strongly influenced by the characteristics of fine aggregate. Stone ash, which has fine particles and a rough surface texture, has the potential to be used as a partial replacement for fine aggregate. This study investigated the effect of stone ash substitution on the compressive strength and fresh properties of SCC in accordance with the European Federation of National Associations Representing for Concrete (EFNARC) 2005 criteria. Stone ash was substituted at 0%, 5%, 10%, 15%, and 20% of the fine aggregate content. Fresh concrete tests included slump flow, T₅₀₀, J-Ring, and GTM Screen Ability, while compressive strength was tested at 28 days. The results showed that all mixtures met the slump flow, viscosity, and GTM Screen Ability requirements. However, the 5% variation showed less satisfactory performance in the T₅₀₀ test, and the 5%, 10%, and 15% variations were classified as Category III (poor) in the J-Ring test. Compressive strength increased at 5%, 10%, and 15% substitutions to 36.66 MPa, 35.80 MPa, and 35.94 MPa, respectively, compared to 30.19 MPa for the control mix. The highest strength was achieved at 5% substitution, representing a 21.43% increase. At 20% substitution, compressive strength decreased to 34.25 MPa. These findings indicate that limited stone ash substitution can enhance SCC compressive strength while maintaining acceptable fresh concrete performance.
Analisis Penempatan Tangga terhadap Simpangan akibat Beban Gempa dengan Metode Time History Analysis (Studi Kasus: Gedung Rawat Inap RSUD dr. Hasri Ainun Habibie) Fitri Kiayi; Kasmat Saleh Nur; Mirzan Gani
Research Review: Jurnal Ilmiah Multidisiplin Vol. 5 No. 1 (2026): Research Review: Jurnal Ilmiah Multidisiplin (Februari 2026 - Juli 2026)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v5i1.305

Abstract

Indonesia has a high level of earthquake vulnerability due to its location within the Ring of Fire and at the convergence of three major tectonic plates. This condition necessitates the design of earthquake-resistant multistory buildings by considering stair elements that are integrated with the main structural system. Improper stair placement may affect structural stiffness and eccentricity and increase interstory drift, potentially leading to severe damage. This study analyzes the effect of stair position on the drift of reinforced concrete building structures using 3D modeling of three stair placement configurations from previous studies. Seismic load analysis employed the Time History Analysis method using three pairs of global earthquake records: Chi-Chi, Kobe, and El Centro. The analysis focused on evaluating interstory drift values to determine whether the stair placement configurations met safety standards. The findings indicate that stair placement significantly affects interstory drift. The Chi-Chi earthquake produced the largest interstory drift in Placement 3, particularly on the second and third floors, exceeding the allowable limit of 40 mm with values of 59.20 mm (X- direction) and 46.19 mm (Y-direction). This was followed by the El Centro earthquake, whereas the Kobe earthquake resulted in the smallest interstory drift for the same configuration, remaining below the allowable limit, with values of 27.54 mm (X-direction) and 24.15 mm (Y-direction).
Analisis Variasi Tras Lompotoo Sebagai Substitusi Parsial Agregat Halus Terhadap Kuat Tekan Beton Self-Compacting Concrete (SCC) Moh. Rizky Pradana; Kasmat Saleh Nur; Komang Arya Utama
Research Review: Jurnal Ilmiah Multidisiplin Vol. 5 No. 1 (2026): Research Review: Jurnal Ilmiah Multidisiplin (Februari 2026 - Juli 2026)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v5i1.307

Abstract

Self-Compacting Concrete (SCC) is a type of concrete capable of flowing and consolidating under its own weight without mechanical vibration, making it suitable for structures with dense reinforcement and complex geometries. The performance of SCC is highly influenced by its constituent materials, particularly fine aggregates, which affect both workability and compressive strength. This study investigated the use of Lompotoo trass as a partial replacement for fine aggregate in SCC and its impact on workability and compressive strength. Lompotoo trass was used at substitution levels of 5%, 10%, 15%, and 20% of the total fine aggregate volume. A superplasticizer, Sika ViscoCrete 3115 N, was added at 1.5% of cement weight. Workability was evaluated through slump flow, T500 flow time, J-ring, and GTM screen stability tests based on EFNARC (2005) standards, while compressive strength was measured at 28 days. The results showed that all SCC mixtures met the required workability criteria. However, the J-ring test indicated poor passing ability (Category III) for the 5%, 10%, and 20% variations. The highest compressive strength was achieved at 5% substitution, reaching 37.16 MPa, a 23.1% increase compared to the control mixture (30.19 MPa). The 10% and 15% substitutions also improved strength by 17.4% and 12.3%, respectively, while the 20% substitution resulted in a slight decrease of 1.26%. These findings suggest that Lompotoo trass is a promising material for partial fine aggregate substitution in SCC, contributing to improved performance and sustainable concrete development.
Analisis Kuat Tekan dan Workability Beton dengan Penambahan Silica Fume dan Variasi Tras Lompotoo Sebagai Substitusi Parsial Agregat Halus Rayhan Putri Maiyo; Kasmat Saleh Nur; Komang Arya Utama
Research Review: Jurnal Ilmiah Multidisiplin Vol. 5 No. 1 (2026): Research Review: Jurnal Ilmiah Multidisiplin (Februari 2026 - Juli 2026)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v5i1.308

Abstract

The use of pozzolanic materials, such as silica fume and Lompotoo trass, aims to enhance concrete performance while reducing the use of sand as a fine aggregate. Lompotoo trass is a material with a high fineness, making it suitable for partial substitution for fine aggregate. This study aims to analyze the effect of adding silica fume and varying the percentage of Lompotoo trass as a partial substitution for fine aggregate on the compressive strength and workability of concrete. The testing was conducted by producing four mix variations: normal concrete and concrete with partial substitution of Lompotoo trass for fine aggregate at 25%, 50%, and 75%. Each variation of Lompotoo trass substitution was combined with the addition of 10% silica fume. In general, changes in concrete characteristics were observed across all mix variations. The slump value showed a decreasing trend as the percentage of Lompotoo trass substitution increased. On the other hand, the compressive strength of normal concrete of f’c 30.34 MPa increased to f’c 32.16 MPa at 25% trass substitution, f’c 32.97 MPa at 50% substitution, and reached f’c 36.65 MPa at 75% substitution. These results indicate that the use of Lompotoo trass combined with silica fume enhances the compressive strength of concrete, although it is accompanied by a reduction in workability.
Co-Authors Anton Kaharu Berni Idji Budi Rahmad Tangahu Dunggio, Mohamad Faisal Faiza A Dali Fitri Kiayi I Made Karya Jurdiawan Ismail Patawe, Mohammad Hamdani Komang Arya Utama Marike Mahmud Mirzan Gani Moh. Rizky Pradana Rahmani Kadarningsih RAHMAWATI WOMTAMI Rawiyah Husnan Rayhan Putri Maiyo Saman, Satar Sarwan Ahmad Umar Suna Usman, Sartika Dewi Yudistira Ekatama