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All Journal Jurnal Penelitian Teknik Sipil Konsolidasi
Yusuf, A. Rumpang
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Civil Engineering, Building, Construction & Architecture Engineering Materials Science & Nanotechnology

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Tinjauan Sistem Drainase di Jalan Perintis Kemerdekaan KM. 10 Depan Pintu 1 Unhas Kecamatan Tamalanrea Latuheru, Alfian Feliks; Yusuf, A. Rumpang; Syahrir, Suryani
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 3 No. 2 (2025): Jurnal Penelitian Teknik Sipil Konsolidasi, Mei 2025
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v3i2.3964

Abstract

In the Tamalanrea sub-district area, when heavy rain fell on Makassar City, there were many locations where roads were flooded with water. As happened in the Perintis area, precisely on Jalan Perintis Independen (in front of door 1 Unhas), there was a puddle of water caused by the drainage channel not functioning optimally because the drainage channel was blocked and also unable to accommodate the high enough water flow. Hydrological analysis carried out Qcapacity calculations using the Manning formula and the results were compared with the requirements Qcapacity > Qplan to determine the capacity capacity of each channel section. The results of the research analysis showed that Qs = 0.529 < Qt = 0.762 for the left side drainage channel and Qs = 0.474 < Qt = 0.698 for the right side drainage channel was proven to be unable to carry the planned discharge so changes in dimensions were made to accommodate the existing discharge.
Uji Kuat Tekan dan Kuat Lentur Beton Akibat Reduksi Semen Dengan Campuran Abu Sekam Padi Dan Bentonite Chau, Jaycin Agnes Elisa; Yusuf, A. Rumpang; Yuniarto, Eka
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 3 No. 1 (2025): Jurnal Penelitian Teknik Sipil Konsolidasi, Januari 2025
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v3i1.4270

Abstract

The rapid development of concrete technology has introduced additives that enhance and improve concrete properties. One material that can substitute cement is pozzolan, such as rice husk ash (RHA) and bentonite, which contain SiO2 and Al2O3. This study aims to examine the effect of RHA and bentonite mixtures as partial cement replacements on the compressive and flexural strength of concrete. The cement content was reduced by 5%, 10%, and 15%, and replaced with RHA and bentonite in proportions of (0%:100%), (100%:0%), and (50%:50%) for a 5% reduction, and (50%:50%) for 10% and 15% reductions. The results showed that normal concrete achieved a compressive strength of 25.29 MPa, while RHA 5% yielded 18.40 MPa, BT 5% achieved 24.44 MPa, and RHA 2.5% BT 2.5%, RHA 5% BT 5%, and RHA 7.5% BT 7.5% produced strengths of 22.27 MPa, 16.28 MPa, and 10.38 MPa, respectively. The normal concrete flexural strength was 3.73 MPa, with the optimum flexural results for RHA 5% at 4.00 MPa, BT 5% at 4.27 MPa, and the RHA 5%, BT 5% mix at 3.87 MPa.
Analisis Stabilisasi Tanah Lempung Dengan Menggunakan Ampas Kopi Dan Arang Kayu Terhadap Nilai CBR Anggareksa, Tenri Angka Arya; Yusuf, A. Rumpang; Cangara, Satriawati
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 4 No. 1 (2026): Jurnal Penelitian Teknik Sipil Konsolidasi, Januari 2026
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v4i1.4331

Abstract

Considering that almost all buildings are built on or on the surface of the land, the land must have resistance to the building or the forces that work through the building by stabilizing the quality of the soil. This research aims to analyze the effect of using coffee grounds and wood charcoal on the geotechnical properties of clay soil. The main focus of the research is on changes in the Unsoaked CBR (California Bearing Ratio) value of clay soil due to the addition of coffee grounds and wood charcoal, both of which have binding properties such as coffee grounds which contain organic C (44.87%), N. (1.69%), K(2.49%), Na(0.04%), P(0.18%), pH (5.6) and wood charcoal can improve water and air circulation so that it can bind carbon and reduces soil swelling and shrinkage. The experimental method was used by mixing 10% wood charcoal and variations of coffee grounds 5%, 10% and 15% into clay soil samples. The results of testing the soil characteristics showed that the soil according to AASHTO was clay soil. Meanwhile, according to the USCS classification, this soil is included in the CH category (high plasticity inorganic clay). The results of the research showed that adding 10% Wood Charcoal to the original soil could increase the CBR value by 23.91%, while in the Wood Charcoal variation with the addition of Coffee Grounds by 5%, 10% and 15%, the CBR value decreased by 18.42%. 15.38%, and 9.57%.
Alternatif Perancangan Dinding Penahan Tanah Tipe Kantilever Untuk Perbaikan Longsoran Lereng Jalan Ruas Jalan Nasional Ampera – Surumana Sulawesi Tengah Saputri K, Sri Sulka Octavia; Yusuf, A. Rumpang; Yuniarto, Eka
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 4 No. 1 (2026): Jurnal Penelitian Teknik Sipil Konsolidasi, Januari 2026
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v4i1.5041

Abstract

In earthquake-prone areas and on slopes at risk of landslides, appropriate slope reinforcement measures are essential. On the Ampera-Surumana road in Central Sulawesi, a landslide of 4.45 meters occurred on a slope opposite a river bend. This landslide was caused by river water seepage, load distribution, and seismic activity that damaged the existing stone masonry retaining wall. This study proposes a cantilever retaining wall as an alternative solution to address the landslide. Slope stability analysis was conducted using GEO5 software and the manual Bishop method. Before loading, the existing slope was safe, with a factor of safety (FS) of 2.29 (unsaturated) and 1.95 (saturated) according to GEO5, and 2.30 (unsaturated) and 1.95 (saturated) per Bishop method. However, after loading, the FS decreased to 1.22 (unsaturated) and 1.10 (saturated) based on GEO5 analysis, and 1.23 (unsaturated) and 1.10 (saturated) according to Bishop method. The analysis indicated a need for soil reinforcement. The stability analysis of the reinforced cantilever retaining wall showed significant increases in FS, with values of 2.59 for overturning, 2.48 for sliding, and 3.38 for bearing capacity using GEO5, and 3.07 for overturning, 2.29 for sliding, and 3.28 for bearing capacity from manual calculations, confirming the effectiveness of the cantilever design in improving slope stability according to SNI 8460:2017.
Penggunaan Vermikulit Dan Kapur Pada Kuat Tekan Bebas Dan Kuat Geser Tanah Lempung Saputrah, Yosrin Adi; Sariman, Syahrul; Yusuf, A. Rumpang
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 4 No. 1 (2026): Jurnal Penelitian Teknik Sipil Konsolidasi, Januari 2026
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v4i1.5117

Abstract

Clay soil is a soil that has a high potential for shrinkage if there is a change in the soil water content system. Expansive soil has a large shrinkage. Stabilization of clay soil is an important step in geotechnical engineering to improve the physical and mechanical properties of the soil, especially in supporting building structures. This study aims to evaluate the effect of adding vermiculite and lime on the unconfined compressive strength (UCS) and shear strength of clay soil. Vermiculite, as a mineral additive material that has high expansion and cation exchange capacity, combined with lime which is chemically able to improve soil stability and strength through pozzolanic reactions. One method of improving expansive clay soil is by adding vermiculite and lime as soil stabilization materials. In this study, shear strength and compressive strength tests will be carried out on soil samples stabilized with vermiculite and lime. This study used 6% vermiculite and variations of lime at 0%, 5%, 10%, 15% which were then tested using the UCS test and direct shear test. The results of the study showed that the highest shear strength, cohesion, and friction angle values were obtained with the addition of 6% vermiculite and 15% lime, namely 0.9247% for shear strength, 0.4392% for cohesion, and 27.57% for friction angle. Similarly, in the compressive strength test, the highest increase occurred with the addition of 6% vermiculite and 15% lime with a stress value of 1.155%.
Co-Authors Anggareksa, Tenri Angka Arya Cangara, Satriawati Chau, Jaycin Agnes Elisa Eka Yuniarto Latuheru, Alfian Feliks Saputrah, Yosrin Adi Saputri K, Sri Sulka Octavia Sariman, Syahrul Suryani Syahrir