What are the two basic material of cement?
What are the two basic material of cement? Portland cement consists essentially of compounds of lime (calcium oxide, CaO) mixed with silica (silicon dioxide, SiO2) and alumina (aluminum oxide, Al2O3). What minerals are used to make cement? Limestone is one of the key minerals used in cement making. Limestone is a sedimentary rock composed mostly of the calcium carbonate (CaCO3) and, according to the Mineral Education Coalition, comprises about 15% of the Earth's sedimentary crust. How is cement made step by step? There are four stages in the manufacture of portland cement: (1) crushing and grinding the raw materials, (2)...