Table 2: Chemical composition and physical properties of fly ash.

Composition or property Type IType II

Chemical composition
 Silica (SiO2)50.265.6
 Alumina (Al2O3)22.525
 Iron oxide (Fe2O3)5.176
 Lime (CaO)20.31.78
 Sulphates (SO3)0.390.3
 Magnesia (MgO)0.510.7
Physical properties
 Fineness (specific surface) by Blaine’s374.6300
 permeability method (m2/kg)
 Sieving on 45-micron residue (%)17.827.05
 Loss on ignition (%)4.024.00
 Insoluble residue (%)90.7496.00
 Moisture (%)0.182