The textbook "Influence of Nano Silica on Mechanical Properties of Concrete" offers a comprehensive analysis of the effects of nano-silica on the mechanical properties of concrete. It examines how nano-silica, as an innovative material in the construction industry, contributes to the improvement of the microstructure of cement-based products. The book highlights the advantages of nano-silica compared to other nanomaterials and emphasizes its role in achieving sustainability goals in construction. The potential applications of nano-silica in various construction projects, particularly regarding early compressive strength and flexural strength, are discussed in detail. These findings are particularly relevant for the development of high-strength mortars, concrete roof tiles, and other cement-based products used in demanding environments.