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Cahyono, Luqman
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PELATIHAN PEMANFAATAN MINYAK BERLEBIH DAN TERSISA MENJADI LILIN RELAKSASI SEBAGAI PEMBERDAYAAN MASYARAKAT BIDANG EKONOMI SIRKULAR DAN PENGELOLAAN LIMBAH BERKELANJUTAN Utomo, Agung Prasetyo; Cahyono, Luqman; Fahmi, M Rizal; Apriani, Mirna; Nugraha, Anggara Trisna; Tiyasmihadi, Tri; Suhardjito, Gaguk; Ningrum, Dwi Setia
MIMBAR INTEGRITAS : Jurnal Pengabdian Vol 4 No 2 (2025): AGUSTUS 2025
Publisher : Biro Administrasi dan Akademik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/mimbarintegritas.v4i2.6391

Abstract

Minyak dari sisa penggorengan atau disebut minyak jelantah merupakan salah satu limbah rumah tangga yang sering dibuang secara sembarangan, hal ini berpotensi mencemari lingkungan apabila tidak dikelola dengan baik. Berdasarkan data Publikasi Indonesia Oilseeds and Products Annual 2019, konsumsi minyak goreng rumah tangga Indonesia mencapai 16,2 miliar liter atau setara dengan 13 juta ton. Data Kementerian Lingkungan Hidup dan Kehutanan (KLHK) menunjukkan bahwa Indonesia menghasilkan lebih dari 3 juta ton limbah minyak goreng per tahun, yang sebagian besar dibuang sembarangan sehingga mencemari tanah dan perairan. Di sisi lain, minyak jelantah memiliki potensi untuk diolah menjadi produk bernilai ekonomi, seperti lilin Beraroma Relaksasi. Inovasi pemanfaatan minyak berlebih dan tersisa (MELISA) menjadi lilin Beraroma Relaksasi tidak hanya memberikan solusi pengelolaan limbah ramah lingkungan, tetapi juga membuka peluang ekonomi kreatif bagi masyarakat. Pelatihan ini bertujuan untuk memberdayakan masyarakat dalam mengelola limbah sisa minyak menjadi lilin Beraroma Relaksasi, sehingga dapat meningkatkan pendapatan sekaligus mengurangi dampak negatif dari limbah minyak tersebut. Sasaran pelatihan ini merupakan ibu-ibu dharma wanita di SMK Negeri 3 Buduran Sidoarjo. Adapun metode pelatihan ini meliputi ceramah, demonstrasi, dan praktik langsung. Hasil evaluasi menunjukkan bahwa peserta mengalami peningkatan pemahaman dan kemampuan dalam proses pembuatan lilin Beraroma Relaksasi berbasis minyak jelantah. Produk yang dihasilkan sudah sama dengan produk lilin dipasaran, hal ini menunjukan potensi untuk dikembangkan secara komersial cukup layak dan masyarakat muncul kesadaran terhadap pengelolaan limbah berkelanjutan.
Eco-Friendly Cellular Lightweight Concrete Partition Walls Using Sandblasting Waste for Seismic Mitigation Cahyono, Luqman; Dermawan, Denny; Pratiwi, Wiwik Dwi; Widiana, Dika Rahayu; Utomo, Agung Prasetyo; Fahmi, M. Rizal; Rosalina, Amanda; Suroidah, Eva Nur; Carina, Annisa; Oktaviastuti, Blima
Rekayasa Sipil Vol. 20 No. 1 (2026): Rekayasa Sipil Vol. 20 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.01.10

Abstract

The increasing demand for efficient construction materials has driven the popularity of lightweight bricks in the last decade. On the other hand, ship repair activities generate sandblasting waste, amounting to 2.5–3 million tons per year, which contains heavy metals and corrosive residues, and is therefore categorized as B3 waste. This study aims to transform sandblasting waste into environmentally friendly partition walls that support earthquake and fire disaster mitigation by formulating lightweight bricks of the Cellular Lightweight Concrete (CLC) type through the modification of foam agents and the substitution of fine aggregates. Initial studies, conducted through interviews at one of the shipyards, revealed an average monthly generation of sandblasting waste of 12,100 kg. This study combines laboratory experiments and a literature review to examine material properties, including gradation, specific gravity, water absorption, and metal content (XRF–TCLP), as well as to evaluate compressive strength, density, and potential applications in earthquake disaster mitigation. The characterization results indicate that the sandblasting waste meets the gradation requirements specified in SNI 03-2834-2000 and passes physical tests according to SNI 03-1970-2008, with heavy metal content (Ba, Zn, Cu) below the threshold set in PP No. 22 of 2021. Lightweight bricks are made with a composition ratio of 1:1 cement and sandblasting waste, and variations in the foam agent range from 5% to 12.5%. The best formula, according to SNI 8640-2018, is obtained at a foam agent content of 5%, resulting in a compressive strength of 7.28 MPa and a density of 1,283.33 kg/m³, which is lighter than concrete blocks and red bricks. From an earthquake mitigation perspective, it was found that lighter material weight contributed to reducing inertial forces and loads on the structure, thereby enhancing resistance to initial collapse and facilitating ease of dismantling during post-earthquake evacuation. These findings indicate that sandblasting waste has the potential to be processed into environmentally friendly alternative construction materials that not only meet technical standards but also contribute to earthquake risk mitigation strategies.
Sustainable Paving Blocks from Fly Ash: An Innovation for the SDGs Wibowo, Sekarsari; Cahyono, Luqman; Khaqiqi, Alwi Sina; Rahayuningsih, Siti; Al Hazman, Muhammad; Kusuma, Dwi Mahendra; Ridwansyah, Moh. Farikh Tirta
Civil and Environmental Science Journal (CIVENSE) Vol. 8 No. 2 (2025)
Publisher : Fakultas Teknik Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2025.008.02.6

Abstract

This study determined the optimal proportion of fly ash as a partial replacement for Portland cement in paving block mixtures to maximize compressive strength while supporting sustainability. Three fly ash substitution levels (10%, 20%, and 30% by cement weight) were evaluated. All mixtures met the K-300 standard (≥30.6 MPa), but the 20% substitution proved optimal, yielding the highest average compressive strength of 37.2 MPa with the lowest variation (CoV of 5.8%). The incorporation of fly ash also enhanced physical properties by reducing water absorption and porosity. The findings validate the use of fly ash for producing high-performance, environmentally friendly paving blocks that meet stringent quality standards.
Compressive Strength and Water Absorption Analysis of Perforated Paving Blocks Incorporating Waste Candlenut Shell Ash Aprilia Sari, Nur Fajar; Cahyono, Luqman; Rismawati, Ria; Sholihah, Mar'atus
Jurnal Teknik Sipil Vol 26, No 1 (2026): Jurnal Teknik Sipil Universitas Tanjungpura
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v26i1.104139

Abstract

The extensive use of candlenut shells as boiler fuel generates substantial ash residues that pose environmental challenges if inadequately managed. Concurrently, conventional paving blocks exhibit limited permeability, thereby increasing urban surface runoff. This study evaluates the feasibility of incorporating candlenut shell ash as a partial replacement for fine aggregate in perforated paving blocks. Distinct from prior studies that focus on ash application in dense concrete systems, this research emphasizes permeability-oriented pavement performance alongside material valorization. Chemical composition was determined using X-ray Fluorescence analysis, while mechanical and durability-related properties, including compressive strength and water absorption, were assessed in accordance with SNI 03-0691-1996. The ash contained 80.04% CaO, suggesting potential pozzolanic activity. Experimental results indicate that a 1:4 mix proportion provides optimal performance, achieving a compressive strength of 20.60 MPa that satisfies Quality B requirements and a water absorption of 9%, meeting Quality C criteria. These findings demonstrate the technical viability of candlenut shell ash for permeable paving applications and support its integration into sustainable urban drainage and circular material management systems.
Co-Authors Abdullah, Kharis Adhi Setiawan Al Hazman, Muhammad Alfanda, Benedicta Dian Alwi Sina Khaqiqi Anggara Trisna Nugraha Anggraini, Febby Dwi Melanny Annisa Carina, Annisa Annisa' Carina Aprilia Sari, Nur Fajar Ashifa, Naura Aqillafasha Blima Oktaviastuti, Blima Denny Dermawan Dewi Kurniasih Dika Rahayu Widiana Dira Pratiwi, Dewi One Dwi Sasmita Aji Pambudi Eky Novianarenti Fahmi, M Rizal Fajarwati Meditama, Ratna Gaguk Suhardjito Gusma Hamdana Putra Hendro Agus Widodo, Hendro Agus Imaniah Sriwijayasih Irma Rustini Aju Kusuma, Dwi Mahendra Kusuma, George Endri M. Rizal Fahmi Mardi Santoso Mirna Apriani Mochammad Choirul Rizal Nindyapuspa, Ayu Ningrum, Dwi Setia Novi Eka Mayangsari Novitrie, Nora Amelia Nugroho, Mochammad Ilham Ponti Almas Karamina Pramesti, Lely Primaningtyas, Widya Emilia Rahayuningsih, Siti Ridwansyah, Moh. Farikh Tirta Rismawati, Ria Rosalina, Amanda Ruddianto, Ruddianto Sholihah, Mar'atus Sumardiono Sumardiono, Sumardiono Suroidah, Eva Nur Syafiuddin Syafiuddin Syafiuddin Tarikh Azis Ramadani Tiyasmihadi, Tri Ujang Sumarwan Utomo, Agung Prasetyo Wibawa, I Putu Arta Wibowo, Sekarsari Wiwik Dwi Pratiwi, Wiwik Dwi Wulandari, Kiki Dwi