<![CDATA[Perna viridis shell powder is an abundant biomaterial waste in coastal areas of Indonesia and has potential for use as a reinforcement in composite materials. This study investigated the effect of varying the weight fraction of Perna viridis shell powder on the physical and mechanical properties of epoxy resin composites fabricated through a degassing process. We used an experimental approach with filler contents of 0%, 25%, 35%, and 45%, with shell powder passing through mesh 100 (approximately 149 µm). Material characterization included macrographic observation, porosity measurement, Charpy impact testing, and tensile testing. The results showed that filler content variations affected the composite structure and mechanical properties. Increasing the filler content improved tensile strength, Young’s modulus, and impact resistance up to a certain composition, while elongation decreased. The highest impact resistance was obtained at 25% filler (0.071 J/mm²), whereas the optimum tensile strength of 32.56 N/mm² was achieved at 35% filler. The highest Young’s modulus, 14.32 N/mm², was obtained at 45% filler. These results demonstrate the potential of Perna viridis shell powder as a reinforcement for epoxy-based composites.]]>
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