The use of blended cements in concrete production consumes less energy and offers improved efficiency and building performance. And, blended cements may contribute to the achievement of LEED (Leadership in Energy and Environmental Design) points.
Innovative approaches to cement formulation yield products with advantages in both performance and sustainability.
Supplementary cementitious materials – minerals used in varying proportions – are incorporated during the last phase of the Portland cement manufacturing process to produce a blended cement. SCMs can be of natural origin, such as natural pozzolans like pumice, or from industrial processes such as iron production and electric power generation.The use of SCMs in concrete reduces CO2 emissions. Because using SCMs in cement production reduces the proportion of clinker (the decarbonation phase of clinker production releases CO2), that reduction in CO2 is also beneficial in reducing the embodied CO2 in concrete.