... is one of a group of compounds obtained by reacting calcium oxide and silica in various ratios[4] e.g. 3CaO ... ; 2CaO•SiO2, Ca2SiO4; 3CaO•2SiO2, Ca3Si2O7 and CaO•SiO2, CaSiO3. Calcium silicate is a white free-flowing powder derived from limestone and ... physical water absorption.Applications:-It is used in roads, insulation, bricks, roof tiles, table salt and occurs in cements, where it ...