Construction Industry News
A sustainability impact assessment of limestone calcined clay cement (LC3) in a project funded by the Swiss Agency for Development and Cooperation reveals an approximately 40% reduction in CO2 emissions and 20% less energy for production compared to standard Portland cement.
At the same time, research was conducted by IIT Madras, IIT Delhi, TARA (Development Alternatives) New Delhi, UCLV (Central University "Marta Abreu" of Las Vilas) in Cuba, and EPFL (Swiss Federal Institute of Technology Lausanne) in Switzerland, with funding from the Swiss Agency for Development and Cooperation, India, has shown that the concrete produced with this cement exhibits excellent strength and durability properties.
Limestone Calcined Clay Cement (LC3) is cement that combines Portland cement clinker, calcined kaolinite clay and limestone with gypsum. Since the production of clinker burns limestone, the amount of cement clinker is limited to only 50 percent, which means a significant reduction in CO2 emissions.
The clay used in LC3 is usually a non-ceramic raw material extracted from Chinese clay mines, including the overburden, while the limestone used in the mixture may come from low-grade sources unsuitable for cement production.
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