Triyono, T. et al. 2026. Effect of Cu and SiO₂ on a Remelted-Recycled Piston Alloy Under Vertical Centrifugal Casting Conditions. Civil Engineering Journal. 12, 1 (Jan. 2026), 337–360. DOI:https://doi.org/10.28991/CEJ-2026-012-01-020.