<ul><li>Conducted experimental research on partial replacement of cement with nano silica (5–10%) and fly ash (15%) to develop sustainable high-performance concrete</li><li>Performed mechanical and durability tests including split tensile strength, flexural strength, water absorption, and acid resistance to evaluate concrete performance</li><li>Demonstrated that nano silica significantly improved tensile and flexural strength, while the combination of nano silica and fly ash enhanced durability and resistance to chemical attack</li><li>Analyzed microstructural improvements due to pozzolanic reaction and densification, confirming reduced porosity and water permeability</li><li>Contributed towards sustainable construction by reducing cement usage, lowering CO₂ emissions, and proving cost-effective alternatives for modern infrastructure<br><br><br><br></li></ul>