First Cement Industries Grade 425 N/R

 ACCORDING TO BRITISH STANDARDS
12/1996 OR ASTM C-150
CHEMICAL COMPOSITION
SILICON DIOXIDE (SIO2) 21.00
ALUMINIUM OXIDE (A12O3) 5.30
FERRIC OXIDE (FE2O3) 3.30
CALCIUM OXIDE (CAO) 65.60
MAGNESIUM OXIDE (MGO) 1.10
SULPHUR TRIOXIDE (SO3) 2.70
LOSS OF IGNITION (LOI) 0.90
TRICALCIUM SILICATE (C3S) 60.00
DICALCIUM SILICATE (C2S) 15.00
TRICALCIUM ALUMINATE (C 3A ) 8.05
TRICALCIUM ALUMINO FERRICE (C4AF) 9.76

PHYSICAL AND MECHANICAL PROPERTIES

BLAIN CM2/GR 325
AUTOCLAVE EXPANTION 0.02
INITIAL SETTING TIME (VICAT) 105 MINUTES
FINAL SETTING TIME (VICAT) 135 MINUTES
COMPRESSIVE STRENGTH @ 03 DAYS 230 KG /CM2 AND@07 DAYS 305 KG /CM2 AND @ 28 DAYS 420 KG /CM2

	Min - Max		Min - Max
Silicon Dixide                      %ُSiO2	20.0 - 22.0	Insotuble Residue                %I.R	0.05 - 0.5
Aluminium Oxide               %َAl2O3	4.5 - 5.5	Free Lime                               %Free CaO	0.7 - 1.5
Ferric Oxide                        %Fe2O3	3.5 - 4	Lime Saturation Factor       LSF	92.0 - 97.0
Calcium Oxide                    %CaO	62.0 - 66.0	Silica Module                          SLM	2.3 - 2.5
Mangnesium Oxide          %MgO	2.5 - 3.5	Alomina Module                     ALM	1.1 - 1.5
Sulphur Terioxide             %So3	2.0 - 3.0	Tricalcium Silicate                %C3S	40.0 - 60.0
Putassium Oxide              %K2O	0.4 - 0.7	Dicalcuim Silicate                 %C2S	15.0 - 30.0
Sodium Oxide                   %Na2O	0.3 - 0.6	Tricalcium Aluminate          %C3A	5.0 - 8.0
Loss on Ignition               %L.O.I	1.0 - 2.5	Tetracalcium Aluminoferry%C4AF	10.5 - 13.0

Physical Test

		Min - Max
Fitness : Blaine Test	Cm2/gr	2800 - 3200
Autoclave Expansion	%	0.01 - 0.2
Setting Time:
Initial	Minute	140 - 190
Final	Minute	270 - 320
Compressive Strength:
After 3 Days	Kg/Cm2	140 - 250
After 7 Days	Kg/Cm2	250 - 340
After 28 Days	Kg/Cm2	350 - 450