LC3 stands for Limestone Calcined Clay Cement. It is a combination of clinker, calcined clay, limestone and gypsum. The cement blend uses 50% clinker, 15% non-cement grade (high silica or high MgO content) limestone, 30% calcined low grade china clay (non-ceramic grade) from mines and 5% gypsum.
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Prof. Shashank Bishnoi,
Department of Civil Engineering,
IIT Delhi, Hauz Khas, New Delhi 110016, INDIA