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Pengaruh Penggunaan Kapur Sirih Sebagai Perekat Terhadap Kekuatan Tekan Briket Batubara Yuliyanto, Yuliyanto; Wahyudie, Illham Ary; Kon Phin, Lioe
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 02 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i02.492

Abstract

The increasing dependence on fossil fuels drives the need for alternative energy solutions to reduce environmental impacts and reliance on petroleum. Coal, particularly anthracite, has emerged as one of the best options due to its abundant availability in Indonesia. However, coal combustion often results in the emission of harmful gases, requiring special handling. This study aims to develop coal briquettes using lime water as a binder. In addition to improving the mechanical characteristics of the briquettes, lime water is also intended to reduce sulfur gas emissions during the briquette combustion process. The briquettes were produced using a binder-to-water ratio (5:6, 5:7, 5:8, 5:9), pressing pressure (8, 9, 10 tons), and drying time (2, 4, 6 days). Compression testing was conducted following the ISO 844 standard using a Universal Testing Machine. The highest result in this study was 502 kPa (5.11 kg/cm²), achieved with a binder-to-water ratio of 5:9, a pressing pressure of 8 tons, and a drying time of 4 days. However, this result remains far below the SNI standard (50 kg/cm²).
The Effect of Fiber Length on the Strength of Composites as Boat Body Materials Pratika, Anggun; Yuliyanto, Yuliyanto; Juanda, Juanda
Integrated Science Education Journal Vol 7 No 1 (2026): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v7i1.2456

Abstract

Purpose of the study: This study investigates the effect of coconut fiber length on the mechanical performance of polyester-based composite materials intended as an alternative body material for small boats, addressing the growing demand for sustainable and locally sourced marine materials. Methodology: An experimental research design was employed using coconut fiber reinforcements with lengths of 10 mm, 30 mm, and 50 mm at a fixed fiber–resin ratio of 5%:95%. Composite specimens were fabricated using the hand lay-up method, reflecting practical production conditions commonly used in small-boat construction. Mechanical characterization was conducted using flexural strength testing in accordance with ASTM D790-02 and impact strength testing in accordance with ASTM E-23, using a Zwick Roell Z020 universal testing machine. Main Findings: The results demonstrate a clear positive correlation between fiber length and mechanical strength, with longer fibers providing more effective stress transfer and energy absorption within the composite matrix. The composite reinforced with 50 mm of coconut fiber exhibited the highest performance, achieving a flexural strength of 63.4 MPa and an impact strength of 45.42 kJ/m², both of which meet the mechanical requirements for small-boat materials set by the Indonesian Classification Bureau. Novelty/Originality of this study: Optimization of coconut fiber length for marine-grade polyester composites, offering empirical evidence that locally available natural fibers can meet regulatory standards for small vessel applications. This research advances eco-friendly composite technology and presents coconut fiber–reinforced polyester as a viable, sustainable alternative to conventional wood-based boat materials.
MANFAAT TABEL DATA USAHATANI BAGI PETANI DI KELURAHAN BLABAK, KECAMATAN PESANTREN, KOTA KEDIRI Yuliarsha Sidhi, Eko; Lisanty, Nina; Yuliyanto, Yuliyanto; Fahas, Exzanidan
Jurnal Pengabdian Masyarakat Bumi Rafflesia Vol. 5 No. 2 (2022): Jurnal Pengabdian Kepada Masyarakat Bumi Raflesia
Publisher : Universitas Muhammadiyah Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kegiatan ini muncul salah satunya, dikarenakan antara lain akibat dari kurangnya pengetahuan dan ketrampilan petani dalam mencatat data kegiatan usaha taninya, sehingga menyebabkan petani sendiri mengalami kesulitan di dalam membuat perencanaan usahataninya, yang akibatnya hasil produksi dan pendapatan usaha taninya tidak sesuai harapan. Di samping itu, apabila ada pihak-pihak lain baik instansi terkait maupun pihak akademisi juga akan memgalami kesulitan untuk memperoleh data yg baik dan benar seperti di Kelurahan Blabak, Kecamatan Pesantren, Kota Kediri. Oleh karena itu harus ada solusi atau jalan keluar. Tentu saja dalam kegiatan ini petani membutuhkan pendampingan dan bimbingan untuk mengatasi hal tersebut di atas. Sekaligus walau dalam suasana pandemi covid-19 kegiatan ini diharapkan dapat mendukung program pemerintah dalam penguatan ketahanan pangan daerah berdasarkan pada potensi dan keunggulannya. Kegiatan pelatihan dan pendampingan diberikan kepada lima belas petani sebagai perwakilan dari kelompok tani di area. Tim pelatih adalah tidak hanya tenaga pendidik dan mahasiswa di perguruan tinggi, namun juga merupakan bagian penting dari penyuluh pertanian di area. Kegiatan pelatihan dan pendampingan berdampak positif terhadap peningkatan pengetahuan dan keterampilan petani setempat dalam melakukan pencatatan kegiatan usahatani mereka dalam bentuk Tabel Data Usaha tani. Kata Kunci: Tabel, data, usaha tani, perencanaan, pencatatan.
Co-Authors Abda Abda Adha, Adha Adi Pratama, Adi Afriadi, Achmad Afriadi, Muhammad Ahmad Gunadi, Ahmad Aiwa, Toto Akbar Rafsanjani, Alfarobbi Al Aziz, Putra Habib Alvariza Farrel, Delza Ambarwati, Indah Widya Amriyeny, Ulya Fajri Anjani, Arrum Puspita Aprilia, Zahra Dhiva Arisha, Andriansyah Oktafiandi Arliansyah, Arul Armin, Andre Hasnuryadi Baharuddin Baharuddin Baharuddin Baharuddin Boy Rollastin, Boy Rollastin Chamro', Wardatul Dafiuddin Salim Dafri, Nastiar Dharta, Yuli Edy Kustiani Eko Noer Kristiyanto, Eko Noer Eko Yudo Eko Yuliarsha Sidhi Ergiantoro, Anugerah Fadhian, Muhammad Filo Fahas, Exzanidan Fathur Rohman, Fathur Feriadi, Indra Habib Al Aziz, Putra Hakim, Zikrul Harwadi, Harwadi Hasdiansah, Hasdiansah Husman, Husman Ilham Ary Wahyudie Imran, Taufik Jailani Jailani Josi, Ahmad Juanda Juanda Junaidi Junaidi Kon Phin, Lioe Kurniawan, Ade Dwi Kusuma, Rian Laily Muharani Lioe, Kon Phin Marzuki, Slamet Masdani, Masdani Muhaimin Muhaimin Muhammad Faisal Amin Muhammad Subhan Muhammad Syahdan muharram, Muhammad Munawirah, Munawirah Mustopa Mustopa Nina Lisanty Novizal Novizal, Novizal Nugraheni Hadiyanti Nurcahya, Dian Nurcahya Nursalam Nursalam Oktoviandi, Oktoviandi Oktriadi, Yudi Parulian Silalahi Permana Liu, Marcell Candra Pranata, Yogi Pratika, Anggun Pristiansyah, Pristiansyah Ramli Ramli Rangga Pratama, Rangga Pratama Razqi, Fadilla Muhamad Robert Napitupulu Rollastin, Boy Sahibu, Supriadi Saputra, Aprianor Teguh Setiawan, Iwan Dwi Simangunsong, Kristian Jubatner Somawardi Somawardi Subarkah, Imam SUBHAN, MUHAMAD Sugianto Sugianto Sujatmiko Sujatmiko Sukanto Sukanto Suzen, Zaldy Sirwansyah Sylvia Madusari Tony, Frans umah, khoiroh Ventani, Embun Wahyudie, Illham Ary Wibowo, Willy Yus Andi, Zulfan Zaldy Kurniawan Zulfitriyanto, Zulfitriyanto