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Table 4: Main properties of the cement and fly-ash

* Cement type II includes 620% limestone filler

Cement type I Cement type II* Fly-ash
SiO2 (%) 19.4 20.3 58.5
Al2O3 (%) 5.5 6.5 23.5
Fe2O3 (%) 3.3 3.2 5.8
CaO (%) 63.1 58.0 2.4
MgO (%) 1.6 1.5 1.8
SO3 (%) 2.7 2.6 0.9
Loss on ignition (%) 2.85 6.13 5.5
Fineness blaine (cm2/g) 3393 3875 4715
Specific gravity (t/m3) 3.12 3.05 2.35