Blended cements are a type of cement that combines traditional Portland cement with supplementary cementitious materials (SCMs) such as fly ash, slag, or silica fume. These materials enhance the properties of the cement, improving its strength, durability, and resistance to environmental factors. Blended cements are often used in construction projects to reduce the carbon footprint and promote sustainability. The use of blended cements can lead to better workability and lower heat generation during hydration. They are suitable for various applications, including concrete, mortar, and grout. By incorporating SCMs, blended cements contribute to more efficient resource use and can help in achieving specific performance criteria in construction.