What is one major benefit of using supplementary cementitious materials (SCMs) in concrete?

Using supplementary cementitious materials (SCMs) in concrete significantly enhances the durability and sustainability of the finished product. SCMs, such as fly ash, slag, and silica fume, can improve the long-term durability of concrete by providing better resistance to environmental factors such as alkali-silica reaction, chemical attacks, and freeze-thaw cycles. They also contribute to the sustainability aspect by reducing the carbon footprint associated with cement production, as they often utilize industrial byproducts.

Moreover, incorporating SCMs can lead to a denser microstructure in the concrete, which further enhances its strength and durability over time. This not only makes concrete more resilient but also extends its lifespan, thereby benefiting both construction practices and the environment.