Grinding of calcined clay

Comminution ball mill

Calcined clay is often finely ground after thermal treatment. Grinding increases the surface area of ​​the material, making it significantly more active in chemical reactions. This is particularly important in the construction industry: Finely ground calcined clay (metakaolin) can be used as a highly reactive additive in cement or concrete. It improves the strength, impermeability, and durability of the building materials while simultaneously contributing to a reduction in CO₂ emissions, as less clinker is required in the cement.