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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa JMTS: Jurnal Mitra Teknik Sipil Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Jurnal Konstruksi SERVIRISMA: Jurnal Pengabdian kepada Masyarakat Jurnal Teknik Sipil
Andrias Suhendra Nugraha
Universitas Kristen Maranatha
Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Energy Environmental Science Materials Science & Nanotechnology Other

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PENGARUH ENERGI PEMADATAN DI LABORATORIUM TERHADAP PARAMETER KOMPAKSI MATERIAL CRUSHED LIMESTONE PADALARANG Andrias Suhendra Nugraha; Jimmy Glorius Dwi Saputra
Jurnal Teknik Sipil Vol 16 No 1 (2020): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v16i1.2496

Abstract

Pelaksanaan konstruksi timbunan jalan (road embankment) merupakan suatu pekerjaan yang memerlukan kajian geoteknik. Kajian geoteknik dilakukan terhadap material timbunan (fill material) yang akan digunakan pada saat tahapan pemadatan (kompaksi) di lapangan. Evaluasi terhadap hasil suatu proses kompaksi mengacu terhadap parameter kompaksi dari fill material yang telah disyaratkan oleh spesifikasi desain. Parameter kompaksi tersebut antara lain adalah kadar air optimum (optimum moisture content, wopt) dan berat isi kering maksimum (maximum dry density, ?dry max). Tujuan studi ini adalah untuk menganalisis dan mengevaluasi pengaruh energi pemadatan di laboratorium terhadap parameter kompaksi material crushed limestone yang berasal dari daerah Padalarang, Jawa Barat. Terdapat 4 (empat) variasi energi pemadatan (E) yang ditinjau pada studi ini yaitu : 605 kN.m/m3 (energi standard Proctor, E1); 1.4 E1; 2.2 E1 dan 3.0 E1. Keseluruhan uji kompaksi di laboratorium menggunakan mold dan rammer untuk standard Proctor test (ASTM D 698). Hasil studi menunjukkan bahwa peningkatan energi pemadatan untuk kompaksi di laboratorium sebesar 3 kali energi pemadatan standard Proctor, hanya menghasilkan kenaikan gdry max sebesar 5% dan merubah nilai wopt sebesar 3%. Hal ini menunjukkan bahwa peningkatan energi pemadatan di laboratorium tidak terlalu berpengaruh terhadap nilai gdry max maupun wopt , untuk kondisi crushed limestone bergradasi buruk (poorly graded) dengan rentang ukuran butir 0.85mm – 4.75mm.
PENGARUH FLY ASH DAN KADAR AIR TERHADAP NILAI CALIFORNIA BEARING RATIO SUATU FILL MATERIAL Murtedza, Muhammad Fadhil; Nugraha, Andrias Suhendra
Jurnal Kacapuri : Jurnal keilmuan Teknik Sipil Vol 7, No 2 (2024): Vol 7, No 2 2024 JURNAL KACAPURI : JURNAL KEILMUAN TEKNIK SIPIL (Edisi Desember
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al-Banjari Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jk.v7i2.14121

Abstract

Abu terbang (fly ash) merupakan hasil limbah nonB3 dari pembakaran batu bara yang di manfaatkan untuk Pembangkit Listrik Tenaga Uap (PLTU).  Pemanfaatan fly ash tengah diupayakan untuk meningkatkan nilai tambah sebagai reuse material yang ramah terhadap lingkungan. Penelitian ini bertujuan untuk memahami dan mengkaji pengaruh fly ash dan kadar air terhadap nilai California Bearing Ratio (CBR) laboratorium suatu fill material yang akan digunakan pada hauling road. Fly ash dan fill material yang digunakan sebagai materal uji berasal dari Tanjung Selor, Kabupaten Bulungan, Kalimantan Utara. Komposisi campuran yang digunakan pada penelitian ini antara lain adalah; fly ash 50% + fill material 50% dan fly ash 70% + fill material 30%. Kadar air campuran untuk fly ash dan fill material adalah pada rentang: 10.24% - 29.88%. Hasil penelitian menunjukkan bahwa kadar air yang semakin besar akan mengurangi nilai CBR. Persentase fly ash (FA) 50% terhadap campuran FA+FM akan menghasilkan nilai CBR yang lebih besar jika dibandingkan persentase FA (70%) terhadap campuran FA+FM. Campuran fly ash 50% + fill material 50% merupakan kondisi komposisi campuran yang optimal dengan nilai CBR 31.84% dan kadar air 10.24%.
INVESTIGASI DAN MITIGASI STRUKTUR BANGUNAN SEKOLAH AKIBAT GEMPA BUMI CIANJUR Kristianto, Anang; Wiyono, Daud R; Setiawan, Deni; Suhendra, Andrias; Pranata, Yosafat Aji
Servirisma Vol. 3 No. 2 (2023): Servirisma : Jurnal Pengabdian kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21460/servirisma.2023.32.56

Abstract

Earthquakes are unexpected natural disasters that can cause severe damage to buildings, especially those not compliant with standards. The construction of educational facilities, in this case, school buildings in Indonesian territory located in earthquake-prone areas, needs special attention. The Cianjur earthquake that occurred in 2022 resulted in damage to several school buildings in the affected area. The Community Service activities in this article investigate 9 Junior High School buildings and 5 Elementary School buildings in the Cianjur Regency area that experienced minor to severe damage that must be immediately repaired or strengthened. Community service in cooperation with the Cianjur regional government's educational institutions and school personnel impacted by the earthquake. The results of the visual investigation of the school building show damage from moderate to severe levels and require immediate action, considering that Cianjur has a high earthquake risk. Repairs and strengthening can be carried out according to the damage level, starting from adding new columns for beams that experience excessive deflection due to dimensions that do not meet the requirements or adding reinforcement using FRP. Columns with dimensions that do not meet the requirements, dimensions can be added even if there is no significant damage visually during the investigation.
Efek Persentase Fly Ash terhadap Parameter Kompaksi Suatu Fill Material Situngkir , Hegi Priel; Nugraha, Andrias Suhendra; Riyadi, Slamet
Jurnal Teknik Sipil Vol 21 No 1 (2025): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v21i1.9694

Abstract

Mining road construction is heavy equipment infrastructure for transportation that carries mining products to facilitate activities. Mining road construction requires high costs, with this research it is hoped that it can utilize by utilizing leftover materials or non-B3 waste around the mining area, it can save costs for mining road construction. This research aims to understand and assess the effect of fly ash presentation originating from coal burning residue from the mining area in Tanjung Selor, North Kalimantan, on the compaction parameters of a fill material that will be used as mining road material. These compaction parameters include maximum dry density, gdry max and optimum moisture content, wopt. The composition of the mixture between fly ash (FA) and fill material (FM-I) includes: FA(50%)+FM-I(50%) and FA(70%)+FM-I(30%).The research results show that increasing the fly ash presentation from 50% to 70% in a mixture of fly ash and fill material will increase the optimum moisture content from 12.9% to 21.9% and will reduce the maximum dry density from 1.44 t/m3 to 1.20 t/m3. The presentation of fly ash affects the compaction parameters of the fill material.
PENGARUH PERUBAHAN SUHU TERHADAP NILAI HUMIDITY MATERIAL FLY ASH PADA KONDISI ROOM TEMPERATURE Pinangkaan, Deananta Julliana; Nugraha, Andrias Suhendra; Kambuaya, Brance
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 3, Agustus 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i3.33858

Abstract

Fly ash is a non-B3 waste resulting from the combustion of coal as the main fuel for Steam Power Plants (PLTU). The use of fly ash is used as a reuse material to optimize the utilization of fly ash and increase the use of waste. This study aims to analyze the physical parameters, namely humidity in a range of temperature changes and its relationship with fly ash moisture content both in the stockpile area and at room temperature conditions in the laboratory. The research location was in the coal mining area, Tanjung Selor, North Kalimantan. Research studies on fly ash material show that humidity is directly proportional to water content and humidity is inversely proportional to temperature. The higher the fly ash temperature, the lower the humidity and the lower the fly ash temperature, the higher the humidity. The humidity value is affected by changes in temperature and test location and the water content value is affected by the humidity value. Field data shows that in the fly ash temperature range: 32˚C - 36˚C, the humidity value is 80% - 87%. Laboratory data shows that in the temperature range of fly ash: 27˚C - 31˚C, the humidity value is 83% - 89%. Abstrak Fly ash (abu terbang) merupakan limbah non-B3 hasil dari pembakaran batubara sebagai bahan bakar utama Pembangkit Listrik Tenaga Uap (PLTU). Penggunaan fly ash digunakan sebagai reuse material untuk pemanfaatan fly ash secara optimalisasi dan meningkatkan penggunaan limbah. Penelitian ini bertujuan untuk menganalisa parameter fisik yaitu humidity pada suatu rentang perubahan suhu serta hubungannya dengan kadar air fly ash baik di area stockpile maupun pada kondisi room temperature di laboratorium. Lokasi penelitian dilakukan di area pertambangan batubara, Tanjung Selor, Kalimantan Utara. Kajian penelitian terhadap material fly ash menunjukkan bahwa humidity berbanding lurus dengan water content dan humidity berbanding terbalik dengan suhu. Suhu fly ash semakin tinggi maka humidity semakin rendah dan suhu fly ash semakin rendah maka humidity semakin tinggi. Nilai humidity dipengaruhi oleh perubahan suhu dan lokasi pengujian dan nilai water content dipengaruhi oleh nilai humidity. Data lapangan menampilkan bahwa pada rentang suhu fly ash: 32˚C - 36˚C, nilai humidity adalah 80% - 87%. Data laboratorium menampilkan bahwa pada rentang suhu fly ash: 27˚C - 31˚C, nilai humidity adalah 83% - 89%.
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.
EVALUASI KEKUATAN TANAH DASAR BERDASARKAN UJI CALIFORNIA BEARING RATIO PADA SUATU RENCANA KAWASAN WISATA Simanjuntak, Samuel; Nugraha, Andrias Suhendra
JMTS: Jurnal Mitra Teknik Sipil Volume 9, Nomor 1, Februari 2026
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v9i1.36765

Abstract

Subgrade strength is a crucial factor in pavement design for areas subjected to static and dynamic traffic loads. This research aims to evaluate the subgrade's bearing capacity at a planned tourism area in Lembang, West Java. The evaluation was conducted using the field CBR test method in accordance with ASTM D 4429 and SNI 1738:2011. Data collection was carried out at 12 scattered areas, covering a total of 89 representative test points. The results show that the actual CBR values varied significantly with average values at each test area ranging from 4.35% to 6.45%. Although all values met the minimum design requirement (>2%), most of the subgrade conditions were classified as "Very Poor" to "Poor-Fair" and remained below the 6% threshold. This condition indicates low subgrade bearing capacity, high deformation potential, and non-uniform subgrade properties, so it is recommended to carry out soil improvement before the pavement construction stage is carried out in the planned tourism area. Abstrak Kekuatan tanah dasar (subgrade) merupakan faktor krusial dalam perencanaan perkerasan yang akan menanggung beban lalu lintas statis dan dinamis. Penelitian ini bertujuan untuk mengevaluasi daya dukung tanah dasar di suatu rencana kawasan wisata di Lembang, Jawa Barat. Evaluasi dilakukan menggunakan metode uji California Bearing Ratio (CBR) lapangan sesuai standar ASTM D 4429 dan SNI 1738:2011. Pengambilan data dilakukan pada 12 area yang tersebar dan mencakup total 89 titik uji representatif. Hasil penelitian menunjukkan bahwa nilai CBR lapangan tanah dasar rata-rata pada setiap area pengujian berkisar antara 4,35% hingga 6,45%. Meskipun seluruh nilai tersebut telah memenuhi syarat minimum perencanaan (>2%), mayoritas kondisi tanah dasar tergolong dalam kategori “Very Poor” hingga “Poor-Fair” dan berada di bawah ambang batas 6%. Kondisi ini mengindikasikan daya dukung tanah dasar yang rendah, potensi deformasi yang tinggi, dan sifat subgrade yang tidak seragam, sehingga direkomendasikan untuk melakukan perbaikan tanah (soil improvement) sebelum tahap konstruksi perkerasan dilakukan pada rencana kawasan wisata tersebut.  
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 Vol. 14 No. 2 (2025)
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.
Implementasi Geocell Di Atas Tanah Dasar Pada Suatu Rencana Kawasan Wisata Nova Sanchez Sitio; Andrias Suhendra Nugraha
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3494

Abstract

Pembangunan jalan di kawasan wisata sering terkendala tanah dasar dengan daya dukung rendah yang berisiko menyebabkan deformasi dan menurunkan kinerja perkerasan. Penelitian ini mengevaluasi penerapan geocell tipe HP15040C pada lapisan base course di atas tanah dasar kawasan wisata di Kabupaten Bandung Barat menggunakan parameter field CBR. Metode penelitian berupa studi kasus kuantitatif melalui observasi lapangan, pemasangan geocell, dan pengujian field CBR sesuai SNI 1738:2011 pada tiga area uji seluas +-3.700 m2. Kondisi awal tanah dasar memiliki CBR laboratorium 1,70 persen, yang menunjukkan daya dukung rendah. Hasil analisis persentil ke-10 menunjukkan nilai CBR karakteristik sebesar 58,84 persen pada Area 1, 56,67 persen pada Area 2, dan 66,11 persen pada Area 3. Selain itu, 90 persen data CBR segmen seragam menunjukkan nilai minimal 60,44 persen pada Area 1, 63,08 persen pada Area 2, dan 66,11 persen pada Area 3. Hasil penelitian menunjukkan bahwa geocell mampu meningkatkan kinerja base course, dengan Area 3 memenuhi kriteria CBR >=60 persen, sedangkan Area 1 dan Area 2 mendekati nilai yang disyaratkan akibat variasi kondisi lapangan. Penelitian ini dapat menjadi referensi awal penerapan geocell pada jalan kawasan wisata dengan tanah dasar berdaya dukung rendah.
Co-Authors Adi Kurniawan Sutanto Ahmad Fauzi Iqbal Angel Refanie DENI SETIAWAN Immanuel Marchellino Jimmy Glorius Dwi Saputra Jordan D. Fahlevi Kambuaya, Brance Murtedza, Muhammad Fadhil Nova Sanchez Sitio Pinangkaan, Deananta Julliana Poppy Chaerani Mulyadi Simanjuntak, Samuel Situngkir , Hegi Priel Slamet Riyadi Sutan A.H.M. Manurung William H. Soentpiet Wiyono, Daud R Yosafat Aji Pranata Zulhazmi Ardi