Cement 42.5
Specification: ordinary grey portland cement 42.5 ren 197-1/2000 and british standards bs12/96
Ordinary portland cement
Specification sheet
Construction grade 42, 5
Colour grey
Minimum standards to be met:according to british standards 12/1996 or
Astm c-150 , en û 197 û 1/2000
Chemical composition
Aluminium oxideal2o35.30
Calcium oxidecao65.60
Dicalcium silicatec2s15.00
Ferric oxidefe2o33.30
Loss of ignitionloi0.9
Magnesium oxidemgo1.10
Silicon dioxidesio221.00
Sulphur trioxideso32.70
Tricalcium aluminatec3a8.05
Tricalcium alumino ferricec4af9.76
Tricalcium silicatec3s60.00
Physical and mechanical roperties
Blain cm2/gr3.250
Autoclave expansion0.02
Initial setting time (vicat)105 minutes
Final setting time (vicat)135 minutes
Compressive strength @ 3 days230kg/cm2
Compressive strength @ 7 days305kg/cm2
Compressive strength @ 28 days420kg/cm2
50 kgm bags