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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 265 Documents
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ANALISIS PENGARUH PENAMBAHAN BAHAN STABILISATOR ABU JERAMI TERHADAP KEPADATAN TANAH LEMPUNG EKSPANSIF KABUPATEN PAMEKASAN laily endah fatmawati; Herry Widhiarto; Heri Santoso
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1568

Abstract

Expansive clay is a soil that has a low carrying capacity and high shrinkage growth. Tthe soil has certain limited physical and mechanical properties. Therefore a stabilization is needed so that the parametric soils values ​​become better so that they can be used as subgrade in a construction. Tests carried out include, specific gravity testing, liquid limits, plastic limits, and compaction testing with proctor test and CBR test. The soil was used in this study was taken from the area Bujur Timur, Pamekasan. The soil included the CH group with a plasticity index of 43.5%. The percentage of addition of rice straw is 0%, 2%, 4%, 6%, 8%, 10% of the dry weight of the soil. The most optimum of proctor test results are the addition of rice straw ash by 5.8% with 0MC (Optimum Moisture Content) value of 15,20 % and dry content weight 1.72 gr/cm3. The optimum test results with 7.8% rice straw ash with a CBR value of 5.4% so that can be used for alternative soil improvement. Keywords: expansive clay, rice straw ash, soil stabilization, pamekasan
BUSUR MAGMATIK GRANIT TANTAN-NAGAN SEBAGAI POTENSI REE DI JAMBI Said, Yulia Morsa; Bagus, Bagus Adhitya; Siregar, Anggi Delliana; Utama, Hari Wiki; Ritonga, Magdalena; Kurniantoro, Eko
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1569

Abstract

REE (Rare Earth Element) or Rare Earth Elements are minerals that contain one or more elements which contained in a group of 17 chemical elements, this group consists of the chemical group lanthanide (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium) are added with scandium and yttrium. In the era of Industry 4.0 or modern industry REE (Rare Earth Element) is a very strategic commodity, the use of rare earth elements is needed in various fields ranging from the electronics industry, telecommunications, modern transportation industry and many more. The REE (Rare Earth Element) density in Jambi-Sumatra occurred since the Early Mesozoic period, which was preceded by the formation of the Tantan Granite Formation to the Cenozoic period in the form of the Nagan Granite Formation.. The research location is in the Manau River, Merangin Regency which is part of the Sunda magmatic arc consists of intrusions granodiorite plutonic rock with xenolites in the form of andesites, micro diorites and diorites in the Tantan Formation, and in Nagan Formation consistsof intrusion of granite, granodiorite and Adamelit rocks. It’s happen because the forming process of REE (Rare Earth Element) mineral deposits is strongly associated with the cooling of plutonic igneous rocks. The purpose of this study are to determine the geological condition of the study area and its relationship to the REE (Rare Earth Element) and to find the potential of REE contained in the Tantan Formation and Nagan Formation in Merangin District, Jambi Province.
EVALUASI SALURAN TERBUKA ENGAN MENGGUNAKAN DISTRIBUSI GUMBELL DAN MODEL THOMAS FIERING Tedy Agung Cahyadi; Deka Citra Dinata; Dahono Haryanto; Hartono; Indun Titisariwati; Rendy Fahlevi
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1570

Abstract

ABSTRAK Nilai curah hujan yang akan terjadi tidak dapat ditentukan secara pasti dan tepat, akan tetapi dapat diperkirakan atau diprediksi. Tujuan dari penyusunan makalah ini adalah untuk membandingkan hasil pembangkitan data curah hujan menggunakan distribusi Gumbell dan model Thomas Fiering untuk selanjutnya menjadi acuan dalam pengolahan data desain saluran terbuka di tambang. Data yang digunakan selama Sembilan tahun (2009-2017), berasal dari data curah hujan milik Pusat Sumber Daya Air (PSDA) Provinsi Sumatera Barat. Dari hasil penelitian didapat nilai curah hujan hasil distirbusi Gumbell sebesar 138,97 mm/hari sedangkan nilai curah hujan berdasarkan perhitungan model Thomas Fiering sebesar 103,4 mm/hari. Dari hasil tersebut disimpulkan bahwa distribusi Gumbell digunakan untuk menjadi data acuan dalam mendesain saluran terbuka. Kata kunci: Curah Hujan, Distribusi Gumbell, Model Thomas Fiering, Saluran Terbuka
ANALISA LAJU KOROSI MATERIAL AA7050 DI LINGKUNGAN 3,5% NaCl DENGAN PENAMBAHAN INHIBITOR Na2WO4 Anita Susiana; M.N Ilman
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1574

Abstract

Aluminium merupakan salah satu logam ringan yang paling banyak digunakan di dunia industri termasuk industri pesawat terbang saat ini karena beberapa keunggulan diantaranya memiliki kekuatan tarik yang relatif tinggi, mempunyai sifat mampu bentuk (formability) yang baik, bersifat non magnetik serta tahan terhadap korosi. Aluminium merupakan logam yang sangat aktif, karena apabila berada di lingkungan yang mengandung oksigen, akan bereaksi untuk membentuk lapisan tipis oksida transparan diseluruh permukaannya yang terbuka. Selaput inilah yang mengendalikan laju korosi dan melindungi logam dibawahnya. Oleh karena itu, komponen-komponen yang terbuat dari aluminium dan paduan-paduannya biasanya memiliki umur yang panjang. Tetapi, Jika selaput ini rusak dan tidak dapat dipulihkan lagi, korosi logam akan terjadi dengan cepat termasuk logam aluminium paduan 7050. Penggunaan inhibitor merupakan salah satu cara yang dapat digunakan untuk melindungi logam dari korosi. Inhibitor ditambahkan untuk mengurangi reaksi antarmuka logam dengan lingkungan, dimana terbentuk lapisan pasif yang menghambat laju pertukaran ion-ion pada logam. Metode penelitian uji laju korosi menggunakan metode polarisasi potensiodinamik dilingkungan 3,5% NaCl. Jenis Inhibitor yang digunakan adalah inhibitor anorganik Na2WO4 dengan variasi konsentrasi 0,1%, 0,3%, 0,5% dan 0,7%. Pengujian mekanis dilakukan sebagai data penunjang yang meliputi uji komposisi, uji tarik, uji kekerasan dan uji strukturmikro. Hasil dari penelitian ini memperlihatkan bahwa konsentrasi optimal inhibitor untuk material aluminium paduan 7050 dilingkungan 3,5% NaCl yaitu pada konsentrasi 0,3% Na2WO4 dengan angka laju korosi sebesar 0,28 mpy. Angka ini lebih rendah jika dibandingkan dengan spesimen uji korosi tanpa menggunakan inhibitor yaitu sebesar 2,42 mpy. Penurunan laju korosi terjadi karena adanya inhibitor yang ditambahkan untuk mengurangi reaksi antarmuka logam dengan lingkungan Terjadinya penurunan angka laju korosi menunjukkan adanya pergeseran ke arah positif yang berarti terjadi proses adsorpsi dan terbentuk lapisan pelindung pada permukaan logam sehingga proses oksidasi dapat ditahan. Penurunan laju korosi terjadi karena adanya inhibitor yang ditambahkan untuk mengurangi reaksi antarmuka logam dengan lingkungan. Kata Kunci: Aluminium 7050, pesawat, korosi, inhibitor, Na2WO4
ADAPTING SUSTAINABLE LIVELIHOOD FRAMEWORK FOR HUMAN WELL-BEING ASSESSMENT IN BANTUL REGENCY Kusumawardhani, Nadia Paramitha
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1582

Abstract

There is broad subject that ecosystem service influence human well-being (HWB), however HWB are unmeasurable variable, therefore it still not been integrated fully into ecosystem service assessment and spatial planning document in Indonesia. Provision of sustainable ecosystem services, especially food provisioning, is a challenge for Bantul Regency as it faces huge production deficits because of land conversion and urbanization, therefore, it will threaten the condition of its human well-being. It aims to determine the distribution of human well-being conditions as well as analyzing which capital is the basic capital for human development in Bantul Regency. This study evaluates and maps human well-being by using Sustainable Livelihood Framework (SLF), based on perspective of experts and stakeholders, then analyzed the spatial variation on landscape by mapping the area, and discussed how to achieve human well-being conditions by maximizing services from the ecosystem. Questioners were distributed to stakeholders that involved in development decision making in Bantul regency in Likert scale, then it was analyze to determine the scores of each indicator in every capital. Then regional boundary shapefile analysis in ArcMap was carried out to map the level of conditions of human well-being. Based on the analysis, Human Capital is the largest capital in the people’s welfare of Bantul, the highest condition is located in the Dlingo and Srandakan Districts. However, financial, physical and social capitals are located in the same area, which makes the Banguntapan, Sewon and Bantul Districts have the best human well-being conditions in all of Bantul Regency. This study also found that besides geographical conditions play an important role in producing different types of ecosystem services, social-economic factors is the most important factor in determining the difference in value of each capital in human well-being. Optimizing planning regulation has to consider these spatial patterns.
KORELASI SEBARAN GEMPABUMI DAN DENSITAS KELURUSAN PADA KEAMANAN CALON TAPAK PLTN BOJONEGARA, BANTEN Mahbub, Rizqi Muhammad; Hartono, Hill Gendoet
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1583

Abstract

Pembangkit listrik tenaga nuklir sangat dibutuhkan di Indonesia mengingat listrik dari batubara sangat merusak lingkungan. Lokasi tapak PLTN Bojonegara di Banten masih dalam perencanaan didukung dari aspek tektonik. Di Busur muka Selat Sunda yang merupakan daerah transisi antara pulau Sumatera dan Jawa yang hingga tahun 2019 mengalami gempa tektonik di bagian subduksi antara Lempeng Indo Australia di bawah Lempeng Eurasia. Pergerakan lempeng aktif menghasilkan gaya kompresi sehingga mengakibatkan zona hancuran sangat luas yang akan berdampak bukan hanya daerah pesisir yang terkena bencana gempa namun daerah yang berdekatan dengan struktur sesar aktif. Objek penelitian yaitu mendeteksi zona lemah dengan metode densitas kelurusan dari data digital elevasi, landsat 8, data gravitasi, serta data focal mechanism. Pertama lakukan interpretasi kelurusan dari digital elevasi landsat 8, yang kemudian menggunakan data struktur geologi Kenozoikum dari peta geologi regional di wilayah Banten. Kedua interpretasi zona lemah dari kriteria jenis batuan berdasarkan peta geologi regional yang dihubungkan dengan densitas kelurusan. Ketiga deteksi kelurusan yang membentuk pola sama dengan pergerakan sesar dari data focal mechanism. Jumlah gempa Magnitudo 2 – 9 yang terdeteksi di perairan Selat Sunda hingga daratan Banten diakibatkan oleh karakteristik gempa mekanisme sesar geser di kedalaman dangkal (D< 20 km), adapun mekanisme sesar geser ini reaktivasi sesar di permukaan di tenggara dan timurlaut Serang, Banten. Panjang kelurusan dan saling koneksi difokuskan dengan grid 500m x 500m berhubungan dengan data densitas dan focal mechanism. Daerah dengan densitas kelurusan tinggi, distribusi gempa dengan mekanisme pergerakan sesar dan arah gaya pembentuk kelurusan tektonik sama dapat mempengaruhi kelayakan lokasi dalam pengembangan PLTN di daerah tersebut.
POTENSI AIRTANAH PADA BATUAN SEDIMEN VULKANIK DENGAN PENGUKURAN GEOLISTRIK DAERAH KECAMATAN PRAMBANAN, SLEMAN, YOGYAKARTA Wisnu Aji Dwi Kristanto; Nandra Eko Nugroho; Thamzez Nuur Anom; Ahmad Muhaimin
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1595

Abstract

Abstract Water is a basic human need for life. Increasing the world's population The quality of surface water is increasing, while the air demand will not stop. The source of clean water besides surface water is groundwater. Therefore, using groundwater as a source of air must be further for continuation. Prambanan area with geological conditions compiled by volcanic sedimentary rock available groundwater potential needs to be done related to groundwater in different places depending on where there is no layer containing groundwater. Identification of groundwater potential carried out in the study area using the geoelectric method. The results of geoelectric measurements show subsurface resistivity cross sections of the study area have two aquifer layers with the first layer 2 meters to 10 meters and the second layer 5 meters to 14 meters which are mostly found in lapilli units and some in sandstones and breccias. Keywords: groundwater potential, volcanic sedimentary rocks, geoelectric
INTERPRETASI ANOMALI MEDAN MAGNET BUMI DI KAWASAN GUNUNGAPI LAMONGAN Ninik Agustin
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1615

Abstract

Lumajang is one of district at Jawa Timur regency where located Lamongan volcanic area. Lamongan volcano is a young monogenetic volcano that was growth from a fault at the summit. Eruption at Lamongan volcano not only occurred at the main volcano, but also at parasite cone at Lamongan volcanic area with 37 cinder cones dan 27 maars. Cinder cones dan maars formed from contact of magma and water that cause freatomagmatic eruption with pyroclastic debris and material deposit’s flow. This research focused at mapping western Lamongan volcanic area based on magnetic anomalies to conducted vulcanic activities at subsurface. Based on magnetic anomalies data, there is an area at south, west, and north with high temperature subsurface rock around maars and cinder cones, that is indicated by negative magnetic anomaly. Keywords: Lamongan volcano, maar, cinder cone, magnetic anomalies.
MITIGASI KEGAGALAN INSULATION UDARA DI ZONA RIGHT OF WAY (ROW) PADA KETINGGIAN POHON PARASERIANTHES-FALCATARIA Utama, Budi; Yuliani, Oni; Handayani, Trie
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1719

Abstract

Abstract Total blackouts (on August 04, 2019) in the Special Capital Region of Jakarta have an impact to daily the economy and the cessation of MRT (Mass Rapid Transit) public transportation services, as well as public communication systems. The determination of the value of the voltage gradient for knowing of the black-out was used the method of analyses to the exposure of the electric fields under the Extra High Voltage (EHV) transmission lines 500 kV, at the span of the tower T.434 and T.435 in Malon hamlet, Gunung-Pati village, districts of Gunung-Pati, Semarang city - central Java. The analysis of the electric field exposured has been carried out in a simulation using a Matlab softwere by solving the simultaneous equations model that corresponding to the tower configuration system and how many conductors were used. The results of the simulation showed that there was a failure of air insulation between phase conductors and the trees of Sengon (Paraserianthes-Falcataria) at a value of voltage gradient of 32 448.10 kV / m, 66 861.13 kV / m, and 33 129.75 kV / m, each were for the lateral distance of 10 m, 12 m, and 14 m from the tower axis T.434 and T.435. Keywords: Mitigation, ROW, Paraserianthes-Falcataria, Transmission-lines
ANALISA PERFORMANCE BAN PADA UNIT PRODUKSI OVERBURDEN HD-785 TERHADAP PRODUKTIVITAS TAMBANG BATUBARA Puspita Sari, Laura
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1775

Abstract

The growing need for coal production led to the greater performance of mechanical tools. In the work of loading and hauling material overburden, the tire's lifetime will be influenced by external and internal conditions. External conditions affecting tire lifetime are road conditions, payload loads that the unit must accept, unit speed and tyre maintenance. While the external condition affecting tire lifetime is the manufacturing tire of the factory that designed it such as Ton Kilometer Per Hour (TKPH) standard used for field operational application. So that the selection of proper tires becomes an important factor for the operation to run smoothly. To minimize the risk of tyre damage, it is necessary to evaluate the performance of tyres by conducting analysis of Key Performance Indicator (KPI) parameters and the ratio of Ton kilometers Per Hour (TKPH) of rating and actual. The results showed that the road condition of the mines that were not well maintenance affected the tire lifetime.

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