Steel slag is a byproduct of steel manufacturing and is utilized in various applications due to its physical and chemical properties. It can be effectively used for the construction of base roads, providing high stability and durability; it can also enhance agricultural soil by improving its nutrient content and structure. Additionally, it serves as a raw material in cement production, contributing to the sustainability of the construction industry by recycling industrial waste. This multifaceted use of steel slag reflects principles of circular economy and waste management that are increasingly emphasized in sustainable development frameworks.