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I Gede Oka Darmayasa
Universitas Mahasaraswati Denpasar
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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DAMPAK NOX TERHADAP LINGKUNGAN Darmayasa, I Gede Oka
Kurva Teknik Vol 2, No 1 (2013): Kurva Teknik
Publisher : Universitas Mahasaraswati Denpasar

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Abstract

Komponen-komponen bahan pencemar utama yang menimbulkan pencemaran udara adalah Karbon Monoksida (CO),Oksida Nitrogen (NOX),Hidro Karbon (HC),Oksida Sulfur (SOX) dan Partikulat.NO2 adalah gas yang toxis bagi manusia, efek yang terjadi tergantung pada dosis serta lamanya pemaparan yang diterima seseorangHewan percobaan yang diberi NO dengan dosis yang sangat tinggi akan memperlihatkan gejala paralisi sistem syaraf dan konvulsi Adanya NOX di atmosfer akan mengakibatkan kerusakan tanaman, tetapi sukar ditentukan apakah kerusakan tersebut diakibatkan langsung oleh NOX atau karena polutan sekunder yang diperoleh dalam siklus fotolitik NO2.Efek yang dapat ditimbulkan umumnya mengenai organ pernafasan yaitu paru-paru, dan efek yang diterima seseorang atau hewan maupun tumbuhan tergantung pada dosis dan lamanya pemaparan. Pengendalian yang dilakukan umumnya modifikasi kondisi pembakaran untuk menurunkan jumlah NOX yang dihasilkan dan menghilangkan NOX dengan pemanfaatan alat-alat perlengkapan dan aliran pembuangan gas.
Kestabilan Lereng Model Tridatu Berkolaborasi Dengan Hydroseeding Berbasis Masyarakat (Studi Kasus: Desa Songan A dan B Kintamani) I Made Nada; Ida Bagus Suryatmaja; I Gede Oka Darmayasa
Jurnal Ecocentrism Vol. 2 No. 1 (2022): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan Unmas Denpasar

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Abstract

Landslide disaster is one of the events that often occurs on the island of Bali, especially in Songan A and B Kintamani villages as happened on February 9, 2017 which claimed lives. One way ti characterize soil properties is to use geotechnical methods. Five slopes that have the potential for landslides in Songan A Village (dsa1, dsa2) and Songan B Village (dsb1, etc2, etc3) were characterized by physical soil properties such as cohesion, shear angle, density and slope geometry analyzed for slope stability using the Fellenius method manually. This study uses a quantitative approach, to determine the value of the factor of safety factor generated for each existing slope is 1.45, 1.35, 1.36, 1.13, 1.20 for the five slopes (FK < 1.5) if a landslide occurs, the landslide will piled up roads and houses. From the results of the characterization, mitigation is carried out in the form of slope arrangement of the Tri Datu Model in collaboration with community-based Hydroseeding 0.93 and 16.40 m3, 2.34 and 3.18 m3, 1.65 and 9.19 m3, 1.52 and 9.8 m3 all values of the factor of safety of slopes (FK > 1.5).
Pembuatan Batu Bata Dengan Memanfaatkan Abu Sisa Pembakaran Limbah Kayu I Gede Oka Darmayasa
Jurnal Ecocentrism Vol. 2 No. 2 (2022): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan Unmas Denpasar

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Abstract

The wood processing industry in its production process will produce a waste or waste in the form of residual ash as a result of combustion in reducing the volume of waste that occurs. However, in the combustion process will produce a residue in the form of ash. The rest of this ash if not managed properly will cause pollution to the surrounding environment. One of the efforts made by utilizing the ashes from the combustion of wood waste as building materials is by using materials in a mixture of bricks. The research was conducted by mixing the remaining ash and clay in the proportions of 0%, 5%, 10%, 15%, 20% and 25%. From the results of the mixture tested the characteristics of the mixture such as compressive strength and water seepage. The results showed that the ash from the combustion of wood waste can be used as a material for making bricks as seen from the results of the physical characteristics test of the mixture.
ANALISIS DAN PERENCANAAN BALOK BETON BERTULANG DENGAN SISTEM PRECAST IN SITE I Made Letra; I Gede Gegiranang Wiryadi; I Gede Oka Darmayasa; Ni Wayan Yuni Astari
Jurnal Ilmiah Kurva Teknik Vol. 10 No. 1 (2021): Jurnal Ilmiah Kurva Teknik
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Mahasaraswati Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.866 KB) | DOI: 10.36733/jikt.v10i1.2142

Abstract

Reinforced concrete beams in this study are designed precast in site or cast before being installed in position. This beam is made only by casting the beam reduced by the thickness of the plate and without the top reinforcement, while the lower reinforcement and shear reinforcement is still installed as required from the analysis. The goal is to shorten the working time and get better concrete quality. This beam is part of the structural elements of a building that has been designed and analyzed in advance with a computer program based on structural analysis, SAP2000 v.16. Dimensions and reinforcement requirements from the results of the structural analysis are used as references to analyze precast in site beams. Main beam dimensions resulting from building structure analysis are B1, B2, and B3 with dimensions of 300x500 mm, but with different amounts of reinforcement requirements. Meanwhile, the joist (BA) has dimensions of 250x400 mm. Then the precast in site beams B1, B2, and B3 have dimensions of 300x350 mm and joists (BA) have dimensions of 250x250 mm after deducting the plate thickness of 150 mm. After being cast and dried at the planned age, the beam is then lifted and positioned on the column provided, after which the upper reinforcement and slab reinforcement are installed and cast again. Analysis of lifting or erection is also carried out to ensure that the working load does not exceed its capacity. The analysis results show that the precast beam is able to carry all the working loads and the precast in site system can be applied safely.
Kuat Tekan Beton Dengan Substitusi Parsial Pecahan Keramik Pengganti Agregat Kasar Campuran Beton I Gede Oka Darmayasa
Jurnal Ecocentrism Vol. 3 No. 1 (2023): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan Unmas Denpasar

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Abstract

With the rapid development at this time, the need for building materials continues to increase, especially concrete-forming aggregates. In this study, ceramic shards were used as an ingredient in the concrete mixture and compared with concrete in the same mixture composition. The research was conducted in the laboratory on the constituent materials in the concrete mix, namely cement, sand and crushed stone. To find out whether the alternative material, namely ceramic shards, meets the requirements, a test is carried out, namely through a concrete compressive strength test. The compressive strength test was carried out by making a mixture of normal concrete and concrete mixed with ceramic shards starting at a proportion of 10%, 20%, 30% and 40%. In this study, a cube test object measuring 15 x 15 x 15 cm was used. The mixed concrete mix was prepared in 8 trials for each proportion and the compressive strength test was carried out at 14 days and 28 days of age. The results of the research showed that the ceramic shards fulfill the requirements as aggregates in the concrete mix, according to the compressive strength value of the resulting concrete. namely concrete K225.
Penggunaan Limbah Batu Cadas Sebagai Agregat Kasar Dalam Campuran Beton I Gede Oka Darmayasa
Jurnal Ecocentrism Vol. 3 No. 2 (2023): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan Unmas Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jeco.v3i2.7311

Abstract

The current high development activity causes the need for building materials to continue to increase, especially concrete-forming aggregates. To overcome this problem, alternative materials are needed as substitute aggregates in the concrete mix. This study used rock waste as an ingredient in the concrete mix, and then the mixed results were compared with standard concrete in the same mix composition. The research was conducted in the laboratory, namely through testing the compressive strength of concrete using a cube test object measuring 15 x 15 x 15 cm. Mixed concrete mix was made in 8 trials with the composition of rock waste 10%, 20%, 30%, 40%, 50%. The compressive strength test was carried out on the specimens at 28 days. From the analysis of the compressive strength data, concrete with the utilization of rock waste in the concrete mix has a compressive strength value that increases according to the proportion of rock powder waste. From the compressive strength test results, it meets the requirements as planned concrete, namely K225.
Ruang Terbuka Hijau dan Jejak Karbon Primer pada Jasa Akomodasi Vila di Kabupaten Badung, Bali Kenedy, Fransiskus Vebrian; Maharani, Made Vina; Wiratama, I Gusti Ngurah Made; Widyasari, Ni Luh; Darmayasa, I Gede Oka
Envirotek : Jurnal Ilmiah Teknik Lingkungan Vol. 16 No. 1 (2024): Envirotek: Jurnal Ilmiah Teknik Lingkungan
Publisher : Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/envirotek.v16i1.327

Abstract

Kabupaten Badung sebagai pusat pariwisata Bali memiliki potensi sebagai penyumbang emisi karbon yang bersumber dari jasa akomodasi pariwisata. Vila merupakan jasa akomodasi dengan sumber penghasil emisi karbon primer dari penggunaan bahan bakar LPG dalam aktivitas memasak. Tujuan penelitian ini adalah menentukan persentase nilai jejak karbon primer pada jasa akomodasi villa di Kabupaten Badung sebagai pertimbangan dalam pemenuhan ruang terbuka hijau. Data primer dari penelitian diperoleh dengan melakukan survey sebanyak 60 vila.Variabel penelitian terdiri atas jumlah penggunaan bahan bakar LPG per bulan pada setiap vila. Jejak karbon primer diperoleh dari nilai faktor emisi LPG dikalikan dengan jumlah penggunaan bahan bakar selama satu bulan. Persentase jejak karbon primer pada jasa akomodasi vila di Kecamatan Kuta Selatan sebesar 36,76% dan memiliki nilai paling tinggi dibandingkan Kecamatan Kuta 34,31% dan Kecamatan Kuta Utara 28,92%. Nilai persentase carbon footprint primer berbanding lurus terhadap rata-rata penggunaan bahan bakar LPG per bulan. Emisi CO2 primer dipengaruhi oleh jumlah LPG dalam aktivitas memasak di vila. Salah satu solusi alternatif untuk menanggulangi jejak karbon primer pada vila adalah menciptakan ruang terbuka hijau melalui pembuatan taman vertikal. Konsep taman vertikal pada vila sebagai ruang terbuka hijau berfungsi menyerap polusi seperti emisi CO2 sehingga kualitas udara sekitarnya menjadi lebih baik.
LIMBAH LUMPUR INDUSTRI PENGOLAHAN BAJA SEBAGAI PENGGANTI PARSIAL PASIR UNTUK BAHAN BANGUNAN Darmayasa, I Gede Oka; Widiantara, I Kadek
Jurnal Ecocentrism Vol. 4 No. 1 (2024): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

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Abstract

This research involves the binding/solidification of sludge waste from the steel processing industry originating from a steel industry in West Java, namely sludge waste from the waste processing process of the iron sponge production unit (direct reduction plant) and the wire rod mill production unit using cement as the binding material in the concrete mixture. The binding of sludge waste is carried out on a laboratory scale with mixture proportions of 0, 10, 20, 30, and 40% sludge waste substitution for fine aggregate/sand. Laboratory tests on the mixture include compressive strength, elastic modulus and Poisson ratio, concrete density, permeability, environmental resistance, and leaching tests with TCLP (toxicity characteristic leaching procedure). Heavy metal leaching tests for Pb, Cd, and Zn have the highest values at a 40% mixture proportion, which are 0.065 mg/ltd, 0.234 mg/lt, values below the quality standard limits for these heavy metals, which are 5.0 mg/lt, 1.0 mg/ltd, and 50 mg/lt, respectively. Environmental resistance tests indicate that the mixture has sufficient resistance after testing through 13 cycles, with the highest weight loss in the mixture sample being 13.97%, a value below the established quality standard where the maximum weight loss is 30%.
Analisis Carbon Footprint pada Jasa Akomodasi Pariwisata di Kabupaten Badung, Bali Wiratama, I Gusti Ngurah Made; Widyasari, Ni Luh; Darmayasa, I Gede Oka
Jurnal Teknologi Lingkungan Vol. 26 No. 1 (2025)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2025.3626

Abstract

Everyone who performs daily activities that require energy will produce carbon dioxide (CO2) emissions. The more activities are carried out, the more energy is used, and thus, the greater the carbon footprint produced. Badung Regency is the center of gravity tourism in Bali. The tourism sector in Badung Regency has been consistently growing over the years. The development of tourism in Badung Regency has environmental implications. The objectives of this research are to identify the carbon footprint values ​​in tourism accommodation services and to analyze the factors influencing the carbon footprint values ​​in tourism accommodation services. The study was conducted in Badung Regency, Bali Province, with a sample of 60 villas selected using the simple random sampling technique. The first research objective involves calculating the carbon footprint based on IPCC guidelines, while the second objective is analyzed through multiple linear regression analysis. The research findings indicate that the primary carbon footprint amount is 25.71 kg CO2-eq/month, or an average of 8.57 kg CO2-eq/month per sub-district. The secondary carbon footprint is 10,520.73 kg CO2-eq/month, or an average of 3,506.91 kg CO2-eq/month. The total carbon footprint of tourism accommodation services is 10,546.45 kg CO2-eq/month, with an average of 3,515.48 kg CO2-eq/month. The correlation coefficient between independent and dependent variables is 80.90%, and the contribution of the independent variables R2 (X1, X2, and X3) to the dependent variable (Y) is 65.50%. The factor that most influences the carbon footprint is the number of villa appliances that use LPG (X2), which is 41.30%. Abstrak Setiap orang yang melakukan aktivitas sehari-hari memerlukan energi dan akan menghasilkan emisi karbon dioksida (CO2). Semakin banyak aktivitas yang dilakukan, semakin banyak energi yang digunakan, dan dengan demikian semakin besar carbon footprint yang dihasilkan. Kabupaten Badung merupakan pusat tujuan pariwisata Bali. Perkembangan pariwisata di Kabupaten Badung terus mengalami perkembangan dari tahun ke tahun. Perkembangan pariwisata di Kabupaten Badung akan berdampak pada kondisi lingkungan. Tujuan dari penelitian ini adalah mengidentifikasi nilai jejak karbon pada jasa akomodasi pariwisata dan menganalisis faktor-faktor yang memengaruhi nilai jejak karbon pada jasa akomodasi pariwisata. Lokasi penelitian dilakukan di Kabupaten Badung, Provinsi Bali dengan sampel sebanyak 60 vila dan dipilih dengan teknik simple random sampling. Analisis tujuan penelitian yang pertama yaitu menghitung jejak karbon dengan berpedoman pada IPCC, sedangkan tujuan penelitian yang kedua dianalisis dengan analisis regresi linear berganda. Berdasarkan hasil penelitian, diketahui bahwa jumlah carbon footprint primer adalah 25,71 kg CO2-eq/bulan atau dengan rata-rata setiap kecamatan adalah 8,57 kg CO2-eq/bulan. Carbon footprint sekunder adalah 10.520,73 kg CO2-eq/bulan atau dengan rata-rata 3.506,91 kg CO2-eq/bulan. Carbon footprint total jasa akomodasi pariwisata sebesar 10.546,45 kg CO2-eq/bulan atau dengan rata-rata 3.515,48 kg CO2-eq/bulan. Koefisien korelasi antara variabel bebas dan variabel terikat adalah sebesar 80,90% sedangkan kontribusi pengaruh variabel bebas R2 (X1, X2, dan X3) terhadap variabel terikat (Y) sebesar 65,50%. Faktor yang paling memengaruhi carbon footprint adalah jumlah peralatan vila yang menggunakan LPG (X2) yaitu sebesar 41,30%
Analisis Optimalisasi Durasi Kegiatan pada Proyek Pembangunan Gedung C SMPN 14 Denpasar dengan Microsoft Project 2007 Yovita Apriliani Soneta; I Gede Ngurah Sunatha; I Gusti Agung Ayu Istri Lestari; I Gede Oka Darmayasa
Jurnal Ilmiah Teknik Universitas Mahasaraswati Denpasar (JITUMAS) Vol. 1 No. 2 (2021): Jurnal Ilmiah Teknik UNMAS Denpasar
Publisher : Fakultas Teknik Universitas Mahasaraswati Denpasar

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Abstract

Dalam proyek konstruksi yang menjadi tolak ukur keberhasilan suatu proyek adalah biaya, mutu, dan waktu. Namun seringkali terjadi durasi pelaksanaan tidak sesuai dengan time schedule rencana yang disebabkan oleh ketidaksesuaian antara ketersediaan sumber daya manusia dilapangan dengan kebutuhan sumber daya manusia. Hal ini menyebabkan keterlambatan pada durasi pelaksanaan proyek Pembangunan Gedung C SMPN 14 Denpasar, Kertalangu. Dari permasalahan tersebut dilakukan penelitian untuk mengetahui perbandingan durasi sebelum dan sesudah dilakukan leveling pada masing-masing kegiatan menggunakan Microsoft Office Project 2007 pada proyek Pembangunan Gedung C SMPN 14 Denpasar, Kertalangu. Berdasarkan analisis tentang perbandingan durasi kegiatan sebelum dan sesudah di leveling, maka didapatkan hasil analisis yaitu durasi rencana berdasarkan time schedule rencana sebelum di leveling 91 hari namun sesudah di leveling berubah menjadi 163 hari dan durasi pelaksanaan berdasarkan laporan harian kegiatan sebelum dileveling 69 hari namun sesudah di leveling berubah menjadi 110 hari.
Co-Authors ., Ni Luh Putu Widyasari I Gede Gegiranang Wiryadi I Gede Ngurah Sunatha I Gusti Agung Ayu Istri Lestari I Made Letra I Putu Agus Putra Wirawan I Wayan Giatmajaya I Wayan Giatmajaya Ida Bagus Suryatmaja Kenedy, Fransiskus Vebrian Made Nada Maharani, Made Vina Ni Ketut Sri Astati Sukawati Ni Ketut Sri Astati Sukawati Ni Ketut Sri Astati Sukawati Ni Made Trangipani Ni Wayan Yuni Astari Widiantara, Kadek odik Wiratama, I Gusti Ngurah Made Yovita Apriliani Soneta