Concrete is one of the most widely used construction materials in engineering and infrastructure projects. With the increasing interest in environmental sustainability, recent studies have focused on identifying alternative and environmentally friendly materials that can be incorporated into concrete production. Recycled rubber obtained from waste tires is considered one of the materials that can be utilized in concrete mixtures to reduce environmental waste and promote the use of sustainable construction materials. This study aims to evaluate the performance of concrete containing recycled rubber by investigating the effect of different rubber contents on the mechanical and physical properties of concrete. Recycled rubber particles are used as a partial replacement for fine or coarse aggregates, while maintaining the other concrete mixture components as constant as possible to determine the influence of rubber content on concrete performance. The study focuses on evaluating compressive strength, splitting tensile strength, and flexural strength to assess the ability of concrete to withstand different types of loads. In addition, physical properties such as density, water absorption, and workability are investigated to determine the effect of recycled rubber on the physical characteristics of concrete and its behavior during mixing and casting. Recycled rubber is characterized by its high flexibility and lower density compared to natural aggregates. Its incorporation into concrete may reduce the overall density while improving its energy absorption capacity and resistance to impact and vibration. However, using high percentages of rubber may lead to a reduction in compressive and tensile strength due to the weak bonding between rubber particles and the cement paste, as well as the differences in physical properties between rubber and conventional aggregates. The expected outcomes of this study may help identify suitable replacement percentages of recycled rubber that achieve a balance between mechanical properties and the physical performance of concrete. Furthermore, pretreatment of rubber particle surfaces using different methods may improve the bonding between rubber particles and cement paste, thereby reducing strength loss and enhancing concrete performance. The significance of this research lies in promoting the use of recycled materials in the construction industry, reducing dependence on natural aggregates, and minimizing the environmental impact associated with the accumulation of waste tires. It also provides opportunities for developing sustainable concrete that can be used in engineering applications requiring specific properties, such as impact energy absorption and vibration reduction. In conclusion, incorporating recycled rubber into concrete represents a promising approach toward achieving sustainability in the construction industry. Evaluating the effects of different rubber contents on the mechanical and physical properties of concrete is an essential step in determining its suitability for various engineering applications while maintaining a balance between structural performance and environmental benefits.