Construction and demolition waste is considered one of the major environmental challenges facing the construction industry due to the continuous increase in waste generated from construction, renovation, and demolition activities. The accumulation of these materials has increased interest in developing effective methods for recycling and utilizing them in the production of environmentally friendly construction materials. The use of construction and demolition waste in sustainable concrete production is considered a promising solution that contributes to reducing the consumption of natural resources and minimizing the environmental impacts associated with waste disposal. This study aims to evaluate the potential use of construction and demolition waste in producing sustainable concrete by recycling materials obtained from demolition activities, such as crushed concrete, bricks, and ceramic waste, and processing them into recycled aggregates that can be used as partial replacements for natural aggregates in concrete mixtures. Different concrete mixtures are prepared using various replacement percentages while maintaining the other mixture components as constant as possible to investigate the influence of recycled aggregates on concrete performance. The study focuses on evaluating the mechanical properties of concrete, including compressive strength, splitting tensile strength, and flexural strength. In addition, certain physical properties, such as density, water absorption, and porosity, are investigated to determine the effects of using construction and demolition waste on concrete quality and durability. The properties of concrete containing recycled aggregates are influenced by several factors, including the type of waste materials used, replacement percentage, aggregate cleanliness, and the presence of old cement mortar attached to the aggregate surface. The use of recycled aggregates may lead to a reduction in certain mechanical properties and an increase in water absorption compared with conventional concrete due to their higher porosity and the presence of adhered old mortar. However, concrete performance can be improved through pretreatment methods, such as washing, removing impurities, and surface treatment, in addition to controlling replacement percentages and appropriately designing the concrete mixture. The expected results of this study may help identify suitable replacement percentages for using construction and demolition waste in concrete production while achieving a balance between mechanical strength, durability, and environmental sustainability. Furthermore, incorporating recycled aggregates can reduce the demand for natural aggregates, decrease the amount of waste sent to landfills, and minimize the environmental impact of the construction industry. The significance of this research lies in promoting the concept of a circular economy in the construction sector by transforming construction and demolition waste from discarded materials into valuable resources that can be reused in producing new construction materials. It also contributes to supporting sustainable construction practices, conserving natural resources, and reducing the environmental costs associated with waste management. In conclusion, the use of construction and demolition waste in sustainable concrete production represents an important approach toward developing a more efficient and environmentally friendly construction industry. Evaluating the effects of recycled aggregates on the mechanical and physical properties of concrete is an essential step in determining their suitability for various engineering applications while meeting sustainability requirements without negatively affecting structural performance.