What does blended cement primarily combine?

Blended cement primarily combines Portland cement with supplementary cementitious materials, such as fly ash and slag. This combination enhances the performance of the concrete by improving its workability, reducing permeability, and increasing its overall durability. Fly ash, a byproduct of coal combustion, can improve the long-term strength and durability of the concrete, while slag, a byproduct of steel manufacturing, can enhance resistance to certain types of corrosion.

Utilizing these materials not only contributes to more sustainable construction practices by recycling industrial byproducts but also results in concrete that can perform better than traditional Portland cement alone in various environments. This is why recognizing the composition of blended cement is crucial for selecting the right materials for specific construction applications.