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All Journal Indonesian Journal of Community Empowerment and Service Rafflesia Journal of Natural and Applied Sciences (RJNAS)
Agus Martono Hadi Putranto
Universitas Bengkulu
Humanities Biochemistry, Genetics & Molecular Biology Chemistry Education Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Peningkatan Nilai Limbah Agroindustri Terhadap Uji Kuat Tekan Dan Uji Kuat Lentur Dalam Pembuatan Beton Agus Martono Hadi Putranto; Bima Triza Saputra; Brian Tri Saka; Riduan Asep Harefa; Rahmat Doni Halomoan Gultom; Tomi Ardiansyah
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 2 No. 1 (2022): April
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v2i1.22984

Abstract

Telah dilakukan penelitian tentang peningkatan pemanfaatan limbah agroindustri terhadap kuat tekan dan kuat lentur dalam pembuatan beton. Dalam penelitian ini digunakan sampel dari limbah sekam padi dan cangkang sawit sebagai sumber silikanya, sedangkan untuk sumber kalsium oksidanya digunakan limbah dari kulit telur ayam ras,cangkang kepiting, cangkang  udang dan cangkang kerang laut. Komposisi campuran kalsium oksida dan silika berbanding 1:1, sedangkan persentase penggantian pada semen dalam penelitian ini adalah 0%, 4%, 6%, 8%, 10%, dan 12% dari berat semen, dengan umur penyimpanan beton 14 hari, 21 hari, 28 hari dan 35 hari. Hasil penelitian menunjukkan bahwa limbah agroindustri sebagai campuran sumber kalisium oksida dan silika dapat meningkatkan uji kuat tekan dan uji kuat lentur beton pada pesentasi penggantian antara 8% - 12% pada masa simpan beton 28 dan 35 hari.
Peningkatan Pemahaman dan Keterampilan Sains Siswa Melalui Eksperimen Kimia Berbasis Bahan Sederhana di SMA Negeri 2 Bengkulu Selatan Yoravika Dwiwibangga; Vicka Andini; Evi Maryanti; Agus Martono Hadi Putranto; Freshka Aulia Aulia Dwi
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 6 No. 1 (2026): June 2026
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v6i1.45627

Abstract

The community service program, “Education and Learning of Chemical Reactions through Simple Science Experiments at SMA Negeri 2 Bengkulu Selatan,” aims to address the limitations of laboratory facilities in chemistry learning. This activity involved 37 students to enhance their understanding of chemistry concepts, practical skills, and interest in chemistry through experiments using natural materials and household waste. The implementation methods included the delivery of basic theory, demonstrations, pretests, and hands-on practice with three simple experiments: identification of vitamin C using iodine, making a lava lamp, and recycling used cooking oil into candles, followed by a posttest. Evaluation results from the pretest and posttest showed a significant improvement in students’ understanding. A total of 90.32% of students stated that they actively participated in the experiments and experienced a significant increase in their understanding of chemical reaction concepts after the practice. This program also strengthened the collaboration between the Chemistry Undergraduate Study Program, Faculty of Mathematics and Natural Sciences, University of Bengkulu, and the partner school through educational and interactive activities. The program outputs include a scientific publication in an ISSN-registered community service journal, an activity video, news publications on the Chemistry Study Program’s website and social media, and an intellectual property registration. Keywords: science experiment; chemical reaction; vitamin C; lava lamp; used cooking oil.
Co-Authors Bima Triza Saputra Brian Tri Saka Evi Maryanti Freshka Aulia Aulia Dwi Rahmat Doni Halomoan Gultom Riduan Asep Harefa Tomi Ardiansyah Vicka Andini Yoravika Dwiwibangga