Cement Oxides

Percent of oxides

Comparison with standard cement

Portland

Cement (PC)

Standard

Cement

CaO

64.59

63 - 66

acceptable

SiO2

22.05

20 - 22

acceptable

Al2O3

5.04

5.5 - 7.5

acceptable

Fe2O3

3.47

3 - 4.5

acceptable

SO3

1.73

1 - 3

acceptable