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All Journal Jurnal Penelitian dan Evaluasi Pendidikan JPK (Jurnal Pendidikan Khusus) INFORMASI Efisiensi : Kajian Ilmu Administrasi Autotech: Jurnal Pendidikan Teknik Otomotif Universitas Muhammadiyah Purworejo Agroland : Jurnal Ilmu-Ilmu Pertanian Reaktor Masalah-Masalah Hukum BULETIN OSEANOGRAFI MARINA International Journal of Science and Engineering (IJSE) e-Journal Pustaka Kesehatan Elkom: Jurnal Elektronika dan Komputer Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Sains Tanah Jurnal Inspirasi Pendidikan ELTE Journal (English Languange Teaching and Education) Interest : Jurnal Ilmu Kesehatan Ethos Jurnal Pseudocode Jurnal EECCIS Techno LPPM Jurnal Agro Jurnal Pendidikan Fisika Jurnal Penelitian Ekosistem Dipterokarpa Jurnal Litbang Industri MIX : Jurnal Ilmiah Manajemen Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Kurva S : Jurnal Keilmuan dan Aplikasi Teknik Sipil Jurnal Kajian Pembelajaran Matematika Jurnal Mirai Management Jurnal Akta Jurnal Manajemen Jurnal Manajemen dan Bisnis Indonesia JURNAL INTEGRASI Jurnal Eksplora Informatika Jurnal Pemikiran Sosiologi Agrin : Jurnal Penelitian Pertanian Jurnal Perikanan Universitas Gadjah Mada Jurnal Penelitian Pengelolaan Daerah Aliran Sungai Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat JURNAL SILOGISME : Kajian Ilmu Matematika dan Pembelajarannya Jurnal Ilmiah Ecobuss Jurnal Kesehatan Indonesia FIRM: Journal of Management Studies Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Jurnal Ilmiah Dunia Hukum Jurnal Teknodik Civil Service : Jurnal Kebijakan dan Manajemen PNS ASSET: Jurnal Manajemen dan Bisnis Inobis: Jurnal Inovasi Bisnis dan Manajemen Indonesia BioEksakta : Jurnal Ilmiah Biologi Unsoed J-PEN Borneo : Jurnal Ilmu Pertanian SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Civics Education And Social Science Journal (CESSJ) SKANIKA: Sistem Komputer dan Teknik Informatika Jurnal Idea Hukum El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam Jurnal Penelitian Ekosistem Dipterokarpa Jurnal Serambi Abdimas Jurnal Penyuluhan Pertanian Journal Of Business, Finance, and Economics (JBFE) Jurnal Sistem Informasi Universitas Dinamika Prosiding Konferensi Nasional PKM-CSR Matriks Teknik Sipil Jurnal Litbang Industri Jurnal Teknologi Informasi Cyberku Jurnal Manajemen dan Kewirausahaan Indonesian Journal of Cancer Jurnal Ilmiah Media Agrosains International Journal of Islamic Business and Economics Journal of Systems, Information Technology, and Electronics Engineering
Purwanto Purwanto
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Journal : Ethos

 1 
SIFAT MEKANIS LAMINASI LIMBAH KULIT JAGUNG (ZEA MAYS) SEBAGAI BAHAN BAKU ALTERNATIF Purwanto Purwanto
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 6 No.1 (Januari, 2018) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v6i1.3557

Abstract

Utilization of waste materials with various engineering for the manufacture of products in all fields has been done by many people to get a new alternative of material. One of these materials is corn skin that has a strong nature, light, and significant texture which make it a potential waste material. This research studies the utilization of corn skin through lamination process, which then put a tensile test and acoustic test/damping power by measuring the coefficient of damping to the sound. The method used in this research is experiment in laboratory by making lamination which is laying arrangement process with number of layers starting from 5, 10, 15, 20 and 25 layer using wooden adhesive then pressing. After forming the laminated sheets, the specimens are made according to ASTM D638 standard for tensile test and ASTM E-1050-98 standard for acoustic test of specimen. The research results indicates that the laminate of corn skin produced the highest tensile strength value of 18.34 N/mm2 on the layer number of 10 layers. The value of this tensile strength is in the category of class V of wood power that can only be used for temporary construction. While the result of acoustical test indicated that the ability of sound damping shown with the highest of (α) 0.266 coefficient value with the number of layers of 5 layers at low frequency (<4000 Hz). Whereas for high frequency (> 4000 Hz), the reducing coefficient (α) is 0.382 with lamination of 10 layers. Compared with other materials, the results of this lamination of con skin at low frequency of (1000Hz) with α = 0.075 have better sound dumping value than play wood material (α = 0.05) and  styrofoam (α = 0.07), so it can be used as an alternative material for sound absorbers such as:; floors, walls, recording studio rooms, inner walls and sound speaker boxes.
KOMPOSIT SERAT ALAM AKAR WANGI DAN LIMBAH SERBUK GERGAJIAN KAYU SEBAGAI BAHAN DASAR ALTERNATIF Purwanto Purwanto
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 4 No.2 (Juni, 2016) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v0i0.1975

Abstract

penelitian ini  adalah mengkaji tentang pemanfaatan limbah untuk membuat bahan komposit dari  limbah serbuk gergajian kayu (SGK) dan bahan alam serat akar wangi (SAW). Metode yang digunakan dalam penelitian menggunakan eksperiman di laboratorium dengan membuat komposit SGK-SAWK  dalam bentuk lembaran dan poros dengan perbandingan berat antara SGK dan SAW adalah 5:1, 5:2, 5:3, 5:4 dan 5:5. Setelah terbentuk komposit kemudian dibuat specimen uji, untuk  uji tarik  spesimen  di buat sesuai standart JIS R7601 dan uji akustik (redam suara) sesuai standart ASTM E336-90. Pengujian dilakukan di Laboratoriun Bahan dan Laboratorium Getaran dan Akustik, Fakultas Teknik UGM Yogyakarta. Hasil penelitian  komposit antara serat akar wangi  dan serbuk gergajian kayu bisa mencapai kekuatan tarik  36,2 kg/mm2 pada komposisi 5:2, hasil ini nilainya lebih tinggi dibandingkan dengan kekuatan tarik bahan kayu kamper sebesar 12,81 kg/cm2. Demikian juga dalam sifat yang lain komposit ini mempunyai kemampuan sebagai  peredam suara bisa mencapai nilai redam (α) 0,99, pada frekuensi 800 Hz. Nilai ini juga lebih tinggi bila dibandingkan dengan bahan kayu yang mempunyai nilai koefisien redam (α) sebesar 0,07 dan pada plywood nilai redamnya (α) sebesar 0,08. Pembuatan komposit dari bahan serat alam dan limbah bisa dilakukan pada skala rumahan sehingga pemanfaatan bahan tersebut dapat dijadikan alternatif bahan dasar pembuatan produk-produk kreatif maupun desain interior yang murah dan ramah lingkungan di industri kecil. 
Sifat Komposit Dari Bahan Serat Akar Wangi Dan Limbah Serbuk Gergajian Kayu Sebagai Bahan Aklternatif Peredam Suara Purwanto Purwanto
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 5 No.1 (Januari, 2017) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/ethos.v0i0.2259

Abstract

The increasing use of composites in all fields is engineered materials that many people do to obtain the new alternative materials, one of the materials such as natural vetiver fiber (SAW) which is strong and lightweight and powder sawn (SGK), which is waste material. In this research, manufacturing the composite of  SAW and SGK then testing acoustic/absorption power by measuring the absorption coefficient of the sound and the observation of microstructure. The method used in the study is an experiment in the laboratory to make composites based on the ratio of the weight fraction between SAW and SGK from 1: 5, 2: 5, 3: 5, 4: 5 and 5: 5. Having formed the composites, then the specimen has made by an acoustic test that compatible to ASTM E-1050-98 standard with B & K 4206 Small Tube Set test instrument. Furthermore, to determine the composition of fibers in the composites, there do the micro observation. From the results of the show the composites produced the sound absorption ability for the low frequency (1000 Hz) with an absorption coefficient (α) of 0.25 occurred in comparative fraction of 2: 5 (SAW20, SGK50). While at high frequency (5000 Hz) has a value of coefficient (α) of 0.41 occurred in the ratio of 1: 5 (SAW10, SGK50). The number of composition number fiber influence the composite tensile strength and micro observations occurred in the composition ratio of 5: 5 its highest strength.
Co-Authors A. S.D. Purwantono Abadyo Abadyo Achmad Nur Alfianto Agung Budi Supangat Agung Prasetyo Fitrianto Ahmad Agus Saikhoni Ahmad Bayu Alfa Mariana Bleszyski Alimatussa'diyah Alimatussa'diyah Alter Lasarudin Amos Amos Anastasia Intan Sawitri Andriana Yeni Oswita Aningtyas Diningrum Apriangga Rachmandinur Aprilina Purbasari Ardian Prima Putra Ardian Putra Putra Arif Rianto Budi Nugroho Arrahman Arrahman Arwan Nur Ramadhan Aryanti Virtanti Anas Asmara Indahingwati Asta Arjunoarwan Hatta Azis N. Bambang B. Amrulloh B.M.A.S. Anaconda Bangkara Baharinawati Wilhan Hastanti Bambang Nur C Bambang Rudianto Wijonarko Budi Supono Indaryanto Catur Supriyanto Damar Irsyad Ustadz Dedy Ansari Harahap Dewi Retna Indrawati Dhesi Wulan Sari Dita Amanah Djamaluddin Djamaluddin Djoko Sudarmono Dwi Achadiani Dwi Ayu Lutfiani Amalia Dyah Hesti Wardhani Eddy Madiono Sutanto Eka Junianti Eka Oktaviani Eko Pudjianto Eko Siswanto Elly Proklamasiningsih Emi Rizky Erlyna Hidyantari Erwin Sutomo Faiqotul Falah Faizah Wardhina Faizal Beni Akbar Fajar Sari Kurniawan Fathorazi Nur Fajri Fenandi Bilian Fitria Roviqowati H Hadiyanto Hardiono Hardiono Hargono Hargono Hartati S Hartmantyo Pradigto Utomo Heri Cahyono Heribertus Himawan Ichwan Mochammad Buchori Iin Novitasari Imam Sujaj Intan Paramita Haty Irzal Nur, Irzal Jatmiko Rinto Wahyudi Joko Tri Haryanto Kholisa Kholisa Kristian Korniadi Laksono Trisnantoro Lamhot P Manalu Lenny Sari M. Pudail Masyithoh G Meta Diana Moch Arief Soeleman Mochammad Ricky Andriyanto Mufti Mufti Muhammad - Ramli Muhammad Aziz Muslim Muhammad N. Misuari Muhammad Pudail Muis Nanja Muji Gunarto Mujiono Mujiono Mukhamat Nasikin Mustofa Mustofa Nadia Sasmita Wijayanti Nana Haryanti Nilna Hidayah Nining Wahyuningrum Nirmana Fiqra Qaidahiyani Nufus M Nunun Tri Widarwati Nur Sakinah Asaad Nurdin Ibrahim nurtyas Laras Oedjijono Oedjijono Oos M. Anwas Ori T Hartonegoro Pulung Nurtantio R. Prasetyo Agung Nugroho Rani Pratikaningtyas Ratri Nugraheni Ricardus Anggi Pramunendar Rini Novrianti Sutardjo Rizanatu Fikrina Rizki Amalia Robertus Sudaryanto Rosariastuti MMAR Rudi Santoso S. Agung S. Raharjo S. Mardin S. Mudmainah S. Suripin Safarudin Safarudin Salman Suleman Sari Widati Siswo Sumardiono Siti Nurchasanah Siti Nurul Azimi Slamet Minardi Slamet Prayitno Slamet Rohadi Suparto Soekma Akhriani Sri Hartati Sri Hernawati Sri Rukiyawati Sri Widodo Stephanus Angger Cahyo Pratono Sudarno Sudarno Sufriadin, Sufriadin Suhaila Hasibuan Sujiono Sujiono Sukarmi Sukarmi Sumani Sumani Suprapedi Suprapedi SUPRIYADI DARSOWIYONO Supriyadi Supriyadi Sutirman Sutirman Syafrudin Syafrudin Syahrul Donie syaifuddin syaifuddin Syamsul Huda T. Agustono T. Syahzaeni Tarjoko Tarjoko TATI NURHAYATI Utomo Utomo Veby Anassetiya Wahyu Wahyu Wahyudi Wahyudi Wahyuningsih Wahyuningsih Yeny Fitriyani Yunus Indra Gunawan