Question

Why glycerol is added in cement solution in complexometric titration?

Answer 1

Cement contains oxides of calcium, Aluminium, Magnesium, iron, and small amount of silica Calcium oxide in a prime constituent of cement. Excess lime reduces the strength of cement and presence of lime in amount lesser than needed also reduces the strength of cement and results in quick setting . The general composition or Indian Portland cement is given below. 

CaO = 60-66%, SiO2= 17-25 %, Al2O3 = 3-8%, Fe2O3 = 2-6 %

MgO = 0.1 -5.5%, SO3=1-3 %, and Na2O and K2O = 0.5-1.5 %