Concrete is one of the most widely used construction materials, recognized for its strength and durability. However, traditional concrete exhibits certain limitations in its mechanical properties. To address these challenges, researchers are exploring nanotechnology, particularly nanosilica, which has been found to improve concrete’s mechanical and durability properties. This study focuses on understanding the impact of nanosilica on concrete’s properties and structural behavior. The research involves characterizing the mechanical properties and microstructure of concrete with varying percentages of nanosilica. The primary objective is to determine the optimal dosage of nanosilica that improves concrete properties. The experimental program includes casting concrete cylinders with nanosilica dosages ranging from 0.1% to 1% in 0.1% increments. These specimens will be tested for compressive strength and split tensile strength. Additionally, the microstructure will be analyzed using scanning electron microscopy (SEM). Based on the results, the optimal nanosilica dosage was identified. Subsequently, slabs were cast using this optimal dosage and compared with conventional concrete slabs to examine the impact of nanosilica on structural elements. This study provides insights into how nanosilica influences concrete properties and its behavior in structural applications. The findings are expected to have significant implications for developing high-density concrete with enhanced mechanical properties, potentially leading to more sustainable and cost-effective construction practices. This research could advance concrete technology and promote the widespread adoption of nanosilica in the construction industry, enabling superior performance and longevity.