Ordinary Portland Cement (OPC) Portland Pozzolana Cement ...
Jan 25, 2018· Pozzolana Portland cement (PPC) is manufactured by combination of pozzolanic materials. Pozzolana is an artificial or natural material which has silica in it in a reactive form. Along with pozzolanic materials in specific proportions, PPC also contains OPC clinker and gypsum. These pozzolanic materials