Fly ash, a residue from coal combustion in power stations, not only contributes to environmental sustainability by repurposing industrial waste but also enhances the performance and quality of concrete. It positively impacts the plastic properties of concrete by enhancing workability, diminishing water requirement, managing bleeding, and moderating the heat generated during hydration. Moreover, fly ash boosts strength development in later stages, mitigates corrosion of reinforcing steel, and enhances resistance to chemical deterioration while reducing permeability.