Portland Cement (%)

Fly Ash (%)

Silica Fume (%)

Oxide

SiO₂

17.2

-

81.9

Al₂O₃

5.1

-

0.9

Fe₂O₃

2.9

-

0.3

SiO₂ + Al₂O₃ + Fe₂O₃

-

93.3

CaO

57.8

-

2.6

MgO

1.4

-

0.5

Na₂O

0.60

0.9

0.62

K₂O

0.70

-

0.54

SO₃

4.1

0.4

0.1

CaO free

0.5

-

Loss on ignition (LOI)

4.7

2.4

2.8

Bogue compounds

C₃S

54.48

-

-

C₂S

8.21

-

-

C₃A

8.6

-

-

C₄AF

8.82

-

−