Pakistan Standard PSS-232/1983

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Specification of Ordinary Portland Cement Pakistan Standard PSS-232/1983

CHEMICAL COMPOSITIONS

CHEMICAL COMPOSITIONS	LIMITS AS PER PSS-232/1983	TIGER CEMENT TEST RESULTS
Loss on Ignition (LOI) %	3.00 Max	01.92
Insoluble Residue (I.R) %	1.50 Max	00.40
Silicon Oxide (SiO2) %	-----	20.25
Aluminium Oxide (Al2O3) %	-----	04.77
Iron Oxide (Fe2O3) %	-----	03.54
Calcium Oxide (CaO) %	-----	63.34
Magnesium Oxide (MgO) %	4.00 Max	02.84
Sulphur Trioxide (SO3) %	C3A ≤ 5.0 %	01.75
	C3A < 5 When SO3 ≤ 2.5
	C3A ≥ 5 When SO3 ≤ 3.0
Lime Saturation Factor (L.S.F) %	0.66 ~ 1.02	00.96
Alkali Eq.	-----	00.60
C₃S	-----	53.80
C₂S	-----	20.19
C₃A	-----	06.40
C₄AF	-----	12.04
Chloride (Cl)	-----	00.01

PHYSICAL TEST

PHYSICAL TEST	LIMITS AS PER PSS-232/1983	TIGER CEMENT TEST RESULTS
Setting Time
Initial Time (Min)	45 Min	185
Final Time (Min)	600 Max	285
Blaine (cm2/gm)	2250 Min	2980
Expansion (mm)	10 Max	0.50
Compressive Strength
02 Days	-----	23.13
07 Days	3400 Min	35.25
28 Days	5000 Min	48.44