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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa JMTS: Jurnal Mitra Teknik Sipil Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Jurnal Teknik Sipil
Andrias Suhendra Nugraha
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Energy Environmental Science Materials Science & Nanotechnology

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Tata Uji Beban Aksial Model Fondasi Tiang Bor Pendek di Lapangan Untuk Studi Tahanan Dukung Ujung Nugraha, Andrias Suhendra
Jurnal Teknik Sipil Vol 1 No 1 (2003): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v1i1.10334

Abstract

Axial load testing on short drilled pile foundation models in the field requires several criteria to be met, including: depth of the tip support layer, adjustments to the capacity and arrangement of the test equipment so that it can still refer to the testing standards. In order for the axial working load on the foundation model to be carried only by the toe bearing resistance, the frictional resistance of the blanket is eliminated through lubrication with liquid silicone. The toe bearing resistance is mobilized at large deformations from 18%d to 30%d. The load test tip bearing resistance value is only about half of the empirically calculated tip bearing resistance.
Critical State Line, Roscoe Dan Hvorslev Surface : Studi Kasus Sampel Tanah U.K. Maranatha Bandung Nugraha, Andrias Suhendra
Jurnal Teknik Sipil Vol 1 No 2 (2005): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v1i2.10339

Abstract

Stability is one of the regular calculation elements in geotechnical engineering. Stability calculations relate to the collapse of a soil mass with large deformation occurring in the collapse plane followed by the collapse of the geotechnical structure. This shows that the analysis of stress-strain behavior at critical state is very important. Soil behavior depends not only on the initial and final stress state but also on the trajectory at which the stress and strain state changes and the previous loading history. The trajectory is different for each type and consolidation state of the soil sample. However, the trajectory will tend towards a unique boundary surface and then along the surface to a single and unique critical state line. This paper aims to describe the critical state line, which is the final destination of the collapse of the loaded soil, and to describe a boundary surface consisting of the Roscoe surface, which is typically traversed by normally consolidated soil samples, and the Hvorslev surface, which is typically traversed by overconsolidated soil samples. A case study was conducted on clay soil samples at U.K. Maranatha Bandung. The shear test conducted was undrained sriaxial consolidated test. The case study shows that the soil sample belongs to normally consolidated clay. The critical state parameters obtained are M and 2.
Efek fly ash terhadap parameter kompaksi material komposit lapisan base course suatu hauling road Immanuel Marchellino; Andrias Suhendra Nugraha
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa 204-211
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.14.2.12082.204-211

Abstract

The utilization of coal combustion waste, particularly fly ash (FA), as an additive in the base course of mining haul roads has the potential to enhance the mechanical performance of the material while supporting sustainable construction practices. This study aims to analyse the effect of fly ash on Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) in a composite material of fly ash and fill material (FM). Samples were collected from the PLTU stockpile in the Tanjung Selor mining area, North Kalimantan, and compaction tests were conducted in the laboratory using the Standard Proctor method (ASTM D698). The results indicate that pure fly ash has a low MDD (0.94 t/m³) and high OMC (65%) due to its fine, lightweight, and porous particles. The addition of 35% fly ash to 65% fill material significantly increased MDD to 1.62 t/m³ and reduced OMC to 10%, demonstrating the interstitial filling effect that improves composite density. Fly ash is non-plastic with a specific gravity (Gs) of 3.02, enhancing the mechanical stability of the composite material without causing plastic deformation. The study concludes that a 35% fly ash proportion in the base course achieves an optimal balance between high density, low moisture content, and ease of compaction, while promoting sustainable mining infrastructure through industrial waste reduction and material cost efficiency.
Co-Authors Angel Refanie Immanuel Marchellino Jordan D. Fahlevi Kambuaya, Brance Murtedza, Muhammad Fadhil Pinangkaan, Deananta Julliana Poppy Chaerani Mulyadi Situngkir , Hegi Priel Slamet Riyadi Sutan A.H.M. Manurung William H. Soentpiet Zulhazmi Ardi