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Table 1 Physical and chemical properties of OPC, fly ash and silica fume.

From: Effect of Relative Levels of Mineral Admixtures on Strength of Concrete with Ternary Cement Blend

Description

OPC

Fly ash

Silica Fume

Physical properties

 Specific gravity

3.14

2.2

2.2

 Blaine’s fineness, m2/kg

288

 Percentage retained on 45μ sieve

17.5

8

Chemical properties

 Calcium oxide, CaO, %

61.87

3.36

3.94

 Silicon dioxide, SiO2, %

23.14

61.72

86.67

 Aluminum oxide, Al2O3, %

5.84

24.12

2.14

 Ferric oxide, Fe2O3, %

4.16

5.11

3.31

 Sulfur trioxide, SO3, %

1.76

0.30

0.58

 Magnesium oxide, MgO, %

1.33

0.40

0.61

 Potassium oxide, K2O, %

0.58

 Sodium oxide, Na2O, %

0.19

 Loss on ignition, %

1.32

1.49

1.94