Article Per Year (5 Year)
p-Index From 2020 - 2025
4.806
P-Index
This Author published in this journals
All Journal JPSE (Journal of Physical Science and Engineering) Metal Indonesia Jurnal TAMBORA JURNAL TEKNIK Specta Journal of Technology Bima Abdi: Jurnal Pengabdian Masyarakat Jurnal Pijar MIPA JURNAL TEKNIK INDUSTRI Hexagon
Fauzi Widyawati
Metallurgical Engineering Study Program, Faculty Of Environmental And Mineral Technology, Sumbawa University Of Technology
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

Published : 28 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 28 Documents
Search

 1   2   3 
PEMANFAATAN SERAT SISAL (agave sisalana L.) DAN LIMBAH PLASTIK PET UNTUK PEMBUATAN BATA RINGAN CLC (CELLULAR LIGHTWEIGHT CONCRETE) Widyawati, Fauzi
Jurnal TAMBORA Vol. 4 No. 1 (2020): EDISI 9
Publisher : Wakil Rektor 3, Direktorat Pengabdian kepada Masyarakat dan Publikasi, Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (795.349 KB) | DOI: 10.36761/jt.v4i1.566

Abstract

Some time ago in the region of West Nusa Tenggara (NTB) experienced earthquake shocks which shocked the community so that many buildings were destroyed and razed to the ground. While the current use of plastic waste is a concern of the community and government, especially in the NTB region. So this background is the basis of research to make earthquake-resistant lightweight bricks by utilizing PET plastic waste to replace coarse aggregate as a mixture and use sisal fiber as a reinforcement to strengthen the strength of lightweight bricks. The purpose of this research is to find out how to make light brick type CLC (Cellular Lightweight Concrete) by utilizing PET plastic waste and sisal fiber, to determine the effect of the addition of PET plastic and sisal fiber to the mechanical properties of light bricks, and to determine the optimum composition of the addition of plastic PET and sisal fiber in the manufacture of lightweight brick CLC. The use of PET plastic and sisal fiber produces brick with an average density of 1,830,419 kg / m3 for 1: 1 variation samples, 1,880 kg / m3 for 4: 1 variation samples, and 1,887,654 kg / m3 for 1: variation samples 4. Maximum compressive strength is achieved in 1: 4 variation samples ie samples with the addition of sisal fiber 4 times more than PET plastic. Based on the results of the measurement of the density of bricks, only the sample variation 1: 1 that meets the standards of SNI 2847-2013 light brick (1,140-1,840 kg / m3). The addition of sisal fiber which is 4 times more than PET plastic (sample variation 1: 4) has the highest compressive strength value of 8.5 MPa and is included in the category of lightweight brick quality I.
IDENTIFIKASI CACAT LASAN FCAW PADA FONDASI MESIN KAPAL MENGGUNAKAN METODE ULTRASONIC TESTING Widyawati, Fauzi; Marano, Lino
Jurnal TAMBORA Vol. 5 No. 2 (2021): EDISI 13
Publisher : Wakil Rektor 3, Direktorat Pengabdian kepada Masyarakat dan Publikasi, Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/jt.v5i2.1124

Abstract

Ultrasonic testing is one of the non-destructive inspection methods for welding results. The ultrasonic testing method has several advantages, namely it can be used to analyze the position of the defect in the object, both the depth of the defect and the dimensions of the defect, and it is an environmentally friendly method. Physical defects that are in solid objects of course cannot be known from direct vision so it is necessary to carry out an inspection of an object to see whether or not there are defects that occur in solid objects. Ultrasonic testing of the results of FCAW welding on the foundation of the ship's engine. FCAW welding is applied to the foundation with two types of welding positions, namely the overhead position coded P1 and the horizontal position coded P2. The test was carried out using a wave frequency of 4 MHz and using a 0° probe for analysis of defects in the area around the weld metal and a 70° probe for analysis of the weld metal. The tests were carried out using the ASME section V and ASTM E164 standards as the standard for determining defects. The test results at the P1 welding position found two types of defects, namely incomplete fusion defects with five welding points with the longest defect length of 40mm and porosity defects with two points with the longest defect length of 30mm. While the results of ultrasonic testing at the P2 welding position found two types of defects, namely slag inclusion defects with a defect length of 35mm and incomplete penetration defects with a defect length of 20 mm. The conclusion of ultrasonic testing is that the difference in welding positions is that the welding position greatly affects the quality of the welding results. The defects resulting from the welding position also vary.
PENGARUH VOLUME LIMBAH SERBUK KAYU JATI (TECTONA GRANDIS) TERHADAP DAYA SERAP AIR PADA KOMPOSIT PARTIKEL DENGAN MATRIKS EPOKSI Desiasni, Rita; Chandra, Rico; Widyawati, Fauzi
Jurnal TAMBORA Vol. 5 No. 2 (2021): EDISI 13
Publisher : Wakil Rektor 3, Direktorat Pengabdian kepada Masyarakat dan Publikasi, Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/jt.v5i2.1128

Abstract

The furniture industry is a company that utilizes forest products in the form of wood as the main raw material in the production process. The wood used by the furniture industry in Indonesia reaches 2.6 million m3 per year. The waste generated reached 54.24% of the total production. Sawmill waste generated as much as 1.4 million m3 per year. Based on field observations in several furniture industries in the Sumbawa Region, most industries produce sawdust waste that has not been used optimally, so that sawdust waste accumulates in the soil and decomposes which can trigger environmental pollution and water pollution. Teak sawdust waste has a high cellulose content so it plays an important role as a reinforcement raw material in the manufacture of particle composites. In this study using the hand lay up method of making composite particles by utilizing waste teak sawdust as raw material for reinforcement and epoxy matrix with volume variations of 30:70%, 40:60%, 50:50%, 60:40%, 70:30. %, to obtain quality composite characteristics. Water absorption obtained 14%, each composite specimen has met the standard of SNI 03-2105-2006. The results of physical tests on the water absorption of particleboard composites were the lowest at 0.48% at 30% powder volume with 24 hours immersion due to the wood powder being mixed and bonded evenly by the matrix so as to reduce voids, while the highest yield was 9.41% in 70% volume is due to the matrix not being able to bind evenly, causing voids to occur. It can be concluded that the increasing volume of powder and the length of time of immersion, the greater the percentage value of water absorption produced.
ANALISIS HUBUNGAN KANDUNGAN TOTAL MOISTURE, TOTAL SULPHUR DAN ASH CONTENT TERHADAP GROSS CALORIFIC VALUE PADA BATUBARA Anggreini, Dian; Bahtiar, Syamsul; Widyawati, Fauzi; Hidayat, Syamsul
Jurnal TAMBORA Vol. 5 No. 3 (2021): EDISI 14
Publisher : Wakil Rektor 3, Direktorat Pengabdian kepada Masyarakat dan Publikasi, Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/jt.v5i3.1316

Abstract

Most of the coal is used as fuel in power plants,cement industry and metal processing industry. Use of coal as fuelwill depend on the quality of the coal used. The main parameters thatdetermining the quality of coal is the calorific value. Meanwhile, the calorific value of a coalwill depend on several parameters, namely total moisture, total sulfur andash content. This study aims to determine the effect of the relationship betweenthe content of some of these parameters on the calorific value of a coal. Analysisperformed using the American Society for Testing and Materials (ASTM).The stages of this analysis include sample preparation, air dry loss testing, residualmoisture, total sulfur, ash content and gross calorific value. The results of the analysis showthat the higher the total moisture content, total sulfur and ash content, the higher thecauses the lower the calorific value of a coal.
Pengaruh Ukuran Partikel, Persen Padatan, dan pH pada Proses Flotasi Terhadap Perolehan Kembali Tembaga Syamsul Bahtiar; Wafdan Muzakki; Rita Desiasni; Fauzi Widyawati; Syamsul Hidayat
Jurnal Pijar Mipa Vol. 16 No. 3 (2021): Juni 2021
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.084 KB) | DOI: 10.29303/jpm.v16i3.1308

Abstract

Flotasi merupakan proses ekstraksi logam berdasarkan perbedaan tegangan permukaan dari mineral di dalam air dengan cara mengapungkan mineral ke permukaan. Faktor yang mempengaruhi nilai perolehan kembali Tembaga antara lain ditentukan oleh ukuran partikel, jumlah persen padatan dan kondisi larutan. Pada penelitian ini akan dilakukan pengamatan terhadap perolehan kembali mineral tembaga dengan melakukan variasi ukuran partikel, variasi persen padatan pada jumlah 33%, 42% dan 47% dan variasi pH larutan pada kondisi basa yaitu pH 10, 10.3 dan 10.6. Pengecilan ukuran partikel dilakukan dengan proses Grinding sampai mendapatkan ukuran + 212 mikron. Selanjutnya, pH larutan dikontrol dengan penambahan kapur. Analisis perolehan kembali mineral tembaga secara kuantittatif dilakukan dengan karakterisasi AAS. Hasil penelitian menunjukkan bahwa ukuran partikel yang optimum didapat pada pada variasi 3% +212 mikron dengan nilai 95.12%. Sedangkan, jumlah persen padatan 42% memberikan nilai tertinggi yaitu 95.12%. Selanjutnya, diperoleh pH terbaik untuk memperoleh tembaga yang optimum yaitu pada pH 10.6 sebesar 95.12%
Analisis Laju Korosi Baja A36 dalam Media Air Laut Hasil Proses Pengelasan Metode FCAW dengan Variasi Waktu Perendaman Fauzi Widyawati; Syamsul Bahtiar; Syamsul Hidayat; Supianto Cibro
Jurnal Metal Indonesia Vol 44, No 1 (2022): Metal Indonesia
Publisher : Balai Besar Logam dan Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32423/jmi.2022.v44.18-26

Abstract

Air laut merupakan media korosi yang paling mudah mengkorosi material, terutama baja. Pada industri perkapalan, sebagian besar konstruksi kapal terbuat dari material baja yang akan kontak langsung dengan air laut dalam waktu yang lama. Seringkali korosi yang terbentuk di permukaan plat, namun pada area sambungan las bisa saja terjadi kecacatan yang selain dipengaruhi oleh media korosi, juga dipengaruhi dari proses pengelasan. Sehingga dilakukan penelitian untuk melihat perbandingan laju korosi antara plat baja yang diaplikasikan untuk lambung kapal, yaitu baja A36 tanpa pengelasan dan dengan pengelasan metode FCAW pada media korosi air laut. Metode yang digunakan dalam penelitian ini adalah metode kehilangan berat. Hasil Penelitian menunjukkan laju korosi pada sampel baja A36 tanpa pengelasan dari hari ke 21 hingga hari ke 42 adalah 0,0705 mm/y dan 0,1560 mm/y. Kedua sampel mengalami kenaikan laju korosi, namun pada hari ke 63 dan hari ke 84 mengalami penurunan laju korosi yaitu 0,1824 mm/y dan 0,1804 mm/y. Begitupun dengan sampel baja A36 hasil pengelasan mengalami kenaikan laju korosi pada hari ke 21 dan hari 42 yaitu 0,1265 mm/y dan 0,2123 mm/y. Namun pada hari ke 63 dan hari ke 84 mengalami penurunan laju korosi yaitu 0,2066 dan 0,1977 mm/y. Sehingga, laju korosi yang didapat pada sampel baja A36 tanpa pengelasan lebih rendah dibandingkan sampel baja A36 hasil pengelasan. Hal ini terjadi karena kondisi media korosi sudah mencapai pada titik jenuh. Jenis korosi yang terjadi pada baja A36 tanpa dan dengan pengelasan menghasilkan jenis korosi merata dan korosi sumuran.
Upaya Pengolahan Limbah Rumah Tangga dalam Pelatihan Pembuatan Minyak Jelantah Menjadi Sabun Cuci di Desa Uma Beringin Fauzi Widyawati; Andani Nurul Hidayah
Bima Abdi: Jurnal Pengabdian Masyarakat Vol. 2 No. 2 (2022): Bima Abdi: Jurnal Pengabdian Masyarakat, Edisi Juli - Desember 2022
Publisher : Yayasan Pendidikan Bima Berilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53299/bajpm.v2i2.194

Abstract

Mayoritas masyarakat desa Uma Beringin berprofesi sebagai pedagang, sehingga penggunaan minyak goreng meningkat. Namun pada saat ini harga minyak goreng melambung tinggi dan mengakibatkan adanya keinginan untuk menggunakan minyak goreng bekas (minyak jelantah) secara terus menurus. Adapun kegiatan pengabdian masyarakat menggunakan metode diskusi, pelatihan dan pendampingan langsung (praktek). Kegiatan pengabdian masyarakat bertujuan untuk memberikan pemahaman tentang bahaya dalam penggunaan minyak jelantah dan memberikan wawasan dalam pengolahan minyak jelantah menjadi produk sabun cuci pakaian. Oleh karena itu, masyarakat memerlukan pelatihan-pelatihan dalam pengolahan limbah rumah tangga, sehingga diharapkan dapat menambah pengetahuan, wawasan, kreatifitas dan menambah kesadaran akan kebersihan serta dapat mengetahui bahaya penggunaan minyak jelantah bagi kesehatan dan lingkungan. Berdasarkan hasil kegiatan pengabdian yang telah dilakukan, menunjukkan mayoritas peserta memberikan respon yang baik dan berpartisipasi secara langsung dalam pembuatan sabun cuci pakaian dari minyak jelantah, serta menghasilkan produk yang dapat bernilai ekonomis.
Effect of the addition of inhibitors of kirinyuh leaf (Chromolaena Odorata) in methanol extract on corrosion rate of ASTM 36 steel Fauzi Widyawati; Syamsul Hidayat; Syamsul Bahtiar; Musbihin Musbihin
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v17i6.4276

Abstract

Kirinyuh leaves (Chromolaena Odorata) contain alkaloids, saponins, flavonoids, phenols, and tannins with the potential as a natural inhibitor that can be used to inhibit the rate of corrosion. Kirinyuh leaf extract inhibitors were added at various concentrations of 100 ppm, 200 ppm, 300 ppm, 400 ppm, and 500 ppm, which were sprayed onto the sample surface before being soaked for seven days. Calculation of the corrosion rate using the method of weight loss (weight loss). The results showed that kirinyuh leaf extract effectively inhibited the corrosion rate. The smallest corrosion rate value was found in the sample with the addition of 400 ppm inhibitor concentration, which was 2.053 ppm. Meanwhile, an efficiency inhibitor was also found in the same concentration of inhibitor that is equal to 87%.
Analysis of Forecasting and Control of Calcium Carbide and Flour Spar Inventories (Case Study: PT. XYZ Southeast Sulawesi) Muhammad Nurdin; Fauzi widyawati
JURNAL TEKNIK INDUSTRI Vol. 12 No. 3 (2022): VOLUME 12 NO 3 NOVEMBER 2022
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Indusri Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jti.v12i3.15658

Abstract

Intisari— meramalkan dan mengendalikan pasokan bahan baku calcium carbide dan flour spar di PT XYZ Sulawesi Tenggara, memiliki tujuan khusus untuk memprediksi dan menentukan pasokan bahan baku yang optimal dan efisien sehingga dapat meminimalisir terjadinya kelebihan stok dan kurangnya stok. Berdasarkan hasil perhitungan, jika peramalan menggunakan metode single exponential smoothing dalam pengadaan bahan baku kalsium karbida akan diperoleh grafik penggunaan RAMP yang lebih banyak dan cenderung naik dari waktu ke waktu, sedangkan bahan baku tepung spar memperoleh grafik penggunaan yang lebih miring daripada penggunaan aktual dan variabel dan cenderung menurun. Jumlah persediaan calcium carbide safety sebesar 184.289 unit/hari dan tepung spar sebesar 13.462 unit/hari, batas atau titik pemesanan bahan baku yang dibutuhkan oleh perusahaan untuk kalsium karbida sebesar 192.318 unit/hari dan tepung spar sebesar 13.951 unit/hari, dan frekuensi pembelian bahan baku kalsium karbida dan tepung spar optimal adalah dua belas kali lipat dari pembelian bahan baku dalam satu periode. Abstract— Forecasting and controlling the supply of calcium carbide and flour spar raw materials at PT XYZ Southeast Sulawesi, has a special purpose to predict and determine the optimal and efficient supply of raw materials so as to minimize the occurrence of excess stock and lack of stock. Based on the results of calculations, if forecasting using the single exponential smoothing method in the procurement of calcium carbide raw materials will be obtained more RAMP usage graph and tend to rise over time, while the raw material flour spar obtained more sloping usage graph than actual use and variable and tend to decrease. The amount of calcium carbide safety inventory of 184.289 units/day and flour spar amounted to 13.462 units/day, the limit or point of ordering raw materials needed by the company for calcium carbide amounted to 192.318 units/day and flour spar amounted to 13.951 units/day, and the frequency purchase of calcium carbide raw materials and optimal spar flour is twelve times the purchase of raw materials in one period.
Pelatihan Pembuatan Ecobrick Sebagai Upaya dalam Penanggulangan Sampah Plastik di SMKN 2 Sumbawa Besar Fauzi Widyawati; Syamsul Bahtiar; Rita Desiasni; Lalu Suhaimi; Emsal Yanuar; I Putu Widiantara
Bima Abdi: Jurnal Pengabdian Masyarakat Vol. 3 No. 1 (2023): Bima Abdi: Jurnal Pengabdian Masyarakat, Edisi Januari - Juni 2023
Publisher : Yayasan Pendidikan Bima Berilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53299/bajpm.v3i1.262

Abstract

Sampah plastik merupakan sampah yang paling sering dijumpai, salah satunya di lingkungan sekolah, bahkan terkadang keberadaannnya tidak dihiraukan. Sehingga, menyebabkan jumlah sampah plastik meningkat setiap harinya. Peningkatan jumlah sampah plastik disebabkan proses pengelolaan sampah yang rumit dan biaya investasi yang mahal. Permasalahan sampah merupakan tanggung jawab bersama, termasuk generasi muda. Sehingga, pengenalaan pengelolaan sampah pada siswa-siswa sangat penting, karena akan menumbuhkan karakter yang peduli akan linkungannya. Salah satu metode dalam pengelolaan sampah yang ramah lingkungan yaitu dengan pembuatan batu bata ramah lingkungan (ecobrick). Program Studi Teknik metalurgi dan mahasiswa Program MBKM UTS Mengajar bekerjasama dengan SMKN 2 Sumbawa Besar untuk mengolah limbah sampah plastik. SMKN 2 Sumbawa Besar memiliki tempat pembuangan sampah induk yang didominasi oleh sampah anorganik dari botol plastik dan bungkusan makanan ringan.  Dalam kegiatan pengabdian ini, metode yang digunakan yaitu diawali dengan observasi lapangan metode diskusi, pelatihan dan praktek langsung pembuatan ecobrick. Kegiatan ini bertujuan untuk memberikan pemahaman tentang bahaya sampah anorganik bagi Kesehatan dan lingkungan, serta dengan adanya pelatihan ini diharapkan dapat meningkatkan kreatifitas para siswa SMKN 2 Sumbawa Besar untuk mengelola sampah anorganik. Berdasarkan hasil kegiatan pengabdian yang telah dilaksanakan, menunjukkan para siswa-siswi memiliki keinginan dan kemauan yang tinggi dalam mempelajari proses pengelolaan sampah dari limbah sampah plastik, yang ditandai dengan partisipasi aktif para siswa mengikuti setiap proses-proses dalam pembuatan bata ramah lingkungan (ecobrick).
Co-Authors Amirin Kusmiran Andani Nurul Hidayah Bahtiar, Syamsul Chandra, Rico Dian Anggreini fatma, fatmawati hendrik Fitriah Assyurah, Dwi Nurul Hermanto, Koko I Putu Widiantara Imam Wierawansyah Eltara izzul islam Jayatri, Adella Ulyandana Khairy, Kholida Tul Malik Fajar Fatoni Marano, Lino Maulana Malik Ibrahim Muhammad Hisyam Muhammad Nurdin Muhammad, Saiful Musbihin Musbihin Nabila, Maitsa Fikri Nur Azman Ramadhan, Risky Ridwan Tanjung Rita Desiasni Rita Desiasni Riza Monica Sahrind, Muhammad Setyaningtyas, Ayunda Kinasih Shinta Esabella Solahudin, Muhammad Miftah Supianto Cibro Syamsul Bahtiar Syamsul Bahtiar Syamsul Hidayat Syamsul Hidayat Syamsul Hidayat SYAMSUL HIDAYAT Wafdan Muzakki Wiradana, Aditya Yanti, Sahri Yanuar, Emsal Yuliana Fitri Sersaningsih Zahra, Karen