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All Journal Traksi : Majalah Ilmiah Teknik Mesin Jurnal Momentum Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Ipteks Terapan Jurnal Teknik Mesin Cakram Jurnal Teknik Mesin pendidikan, science, teknologi, dan ekonomi Jurnal Teknologi dan Vokasi
Mastariyanto Perdana
Institut Teknologi Padang
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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SIFAT MEKANIK KOMPOSIT ARANG AKTIF BERBAHAN DASAR LIMBAH CANGKANG KEMIRI DAN RESIN EPOKSI Pratiwi, Putri; Nurzal, Nurzal; Hafni, Hafni; Perdana, Mastariyanto
Jurnal Teknologi dan Vokasi Vol 4 No 1 (2026): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2026.4.1.%p

Abstract

This study investigates the effect of weight fraction in an epoxy-based composite reinforced with candlenut shell charcoal powder on mechanical properties, specifically shear strength and flexural strength. The filler consisted of candlenut shell charcoal powder with a particle size of 841 to 1190 μm. The candlenut shell charcoal to epoxy matrix ratios were varied at 55:45 %wt, 60:40 %wt, 65:35 %wt, 70:30 %wt, 75:25 %wt, 80:20 %wt, and 85:15 %wt. Composite specimens were prepared by homogeneous mixing, molding, and followed by room-temperature curing before mechanical testing. Mechanical characterization was conducted through flexural and shear tests using a Universal Testing Machine (UTM) with appropriate fixtures for each test method. The results indicate that increasing the filler fraction tends to reduce the mechanical performance of the composites. The highest flexural strength was obtained at 55:45 %wt by 16.63 MPa, while the lowest value was recorded at 85:15 %wt by 4.88 MPa. The highest shear strength also occurred at 55:45 %wt by 8.87 MPa and reached the minimum at 80:20 %wt by approximately 1.65 MPa, with a sharp decrease observed at 70:30 %wt. Overall, the findings demonstrate that increasing the candlenut shell charcoal powder fraction decreases both flexural and shear strengths. This degradation at high filler loadings is associated with reduced epoxy wetting of particles, increased agglomeration and porosity, and weakened load transfer across the filler–matrix interface. These results suggest that the composite formulation requires an optimum filler fraction and careful control of mixing and molding processes to achieve more stable mechanical performance.
Co-Authors Abral, Hairul Ahmad Fachrurrozi Akmal Akmal Akmal Akmal Alfith Alfith Alfurqan, Rahmat Ardhy Meidianda Eko Kasmianto, Eko Farid Septio Matrilindo Firdaus, Syahrul gustio mitro Hafni Hafni Hengki Putra Jamasri . Meiki Eru Putra Muhammad Syaifullah, Muhammad Murfid Al Ikram Nofriady Handra, Nofriady Nurzal, Nurzal Pratiwi, Putri Putri Pratiwi Putri Pratiwi Romi Romi, Romi Rozi Saferi Rozi Saferi Rozi Saferi, Rozi Septio Matrilindo, Farid Sulaiman Sulaiman Syafrul Hadi Syahrul Firdaus Yulianti, Lusi