Limestone Calcined Clay Cement (LC³) is an innovative blended Portland cement that includes addition of calcined clay and limestone. The main components of LC³ are clinker, calcined clay, limestone and gypsum.

Calcined clay and limestone are already commonly used as Supplementary Cementitious Materials (SCMs). The major innovation in LC³ is to combine the use of abundantly available low-grade kaolinite clay with a further 15% of limestone, which together have a synergetic effect and reach a similar performance as OPC – CEM I.

The additional alumina in the metakaolin reacts with the ground limestone, leading to a less porous material, and therefore providing equal strength with higher levels of clinker substitution.

LC³ is a breakthrough technology with lower 30-40 % CO₂ emission compared to CEM1. It is an ideal innovative cement to lower the environmental impact of the cement and concrete industry while fulfilling the needs for affordable housing and other infrastructure.

Transforming Construction, Saving the Planet: LC³ – where innovation meets sustainability. With 30-40% less CO2, LC³ redefines cement, offering strength, eco-friendliness, and affordability for a brighter, greener future in construction.