What are supplementary cementitious materials primarily used for?

Supplementary cementitious materials (SCMs) are primarily used to enhance long-term strength and reduce costs in concrete production. These materials, such as fly ash, slag, and silica fume, can be blended with traditional Portland cement to not only improve the mechanical properties of concrete over time but also to minimize the overall cement content required for a given strength. This reduction in cement use lowers costs and promotes sustainability by decreasing the carbon footprint associated with cement production.

In addition to cost efficiency, these materials contribute to long-term durability and can enhance the overall performance of concrete structures, making them a valuable component in modern construction practices. The use of SCMs is particularly beneficial in applications where strength development is critical over extended periods, such as in large infrastructure projects.