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	Cement & Clinkers 42.5N/R

PRODUCT (1) GUARANTEED SPECIFICATIONS
BS 12 - 1996 ORDINARY PORTLAND CEMENT CLASS 42.5 N

1 CHEMICAL COMPOSITION: TYPICAL TEST RESULTS STANDARD REQUIREMENT
BS 12-1996
Magnesium oxide (MgO % 0.60 4.00 max
Sulphur trioxide (SO3) % 1.65
When C3A >8%
When C3A > 8%
When C3A < 3.5% 2.50max
When C 3A > 3.5% 3.50max
Toatl alkali content as Na2O equivalent % 0.38
Loss on ignition % 1.38 3.00max
Insoluble residue % 0.32 150ma
Chlor (Cl) % 0.005 0.10max
Lt. PHYSICAL PROPERTIES
Fireness:
-Air permeability test with Blain app m2,kg Durability 3.25 275min
- Expansion in Autoclave %
Compressive strength 0.10 0.80max
-2days kg/cm2 (N/mm2) (21.8) (> 10)
-3 Days kg/cm2 187
- 7 days kg/cm2 272
- 23 days kg/cm2 (N/mm2) 378( 50.9 ) ( 42.5 - 62.5)
Time of setting ( vicat test )
-initial minutes 120 50 min
- Final set minutes 285
Soundness expansion ( Le - Ghatelier mm 0.50 10 max
False set:
Final preparation % 73.83

PORTLAND CEMENT 42.5R SPECIFICATIONS

Grey Portland Cement for construction grade 42 . 5 - R
According to British standards12/1996 or ASTM C-150, BS EN 197-1,( GB 175-1999)

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(c3a) 8.05
Tricalcium alumino ferrice(c4af)9.76
PHYSICAL AND MACHENICAL.
BLAIN CM2/GR 3.250
AUTOLAVE EXPANTION 0.02
INITIAL SETTING TIME (UICAT) 105 MINUTES
FINAL SETTING TIME (UICAT) 135 MINUTES
COMPRESSIVE STRENGTH 03 DAYS 230KG/CM2
07 DAYS 305KG/CM2
28 DAYS 420KG/CM2

Portland PC � CP CEM 1- 52.5 Cement
with early strength for concrete producers and pre-cast manufacturers
British standard 12/1996 - BS EN 197-1
TYPICAL PROPERTIES:

Surface area (m2/kg) 290 � 420
Setting time � initial Mins 80 � 200
EN 196-1 Mortar
Compressive strength
2 days 25 � 35
7 days 40 � 50
28 days 54 � 64
Apparent particles density Kg/m3 3080 � 3180
Bulk density Kg/m3
Aerated 1000 � 1300
Settled 1300 -1450
Colour Y value 27.5 � 37.5
Sulphate SO3 2.5 � 3.5
Chloride Cl <0.06
Alkali Eq Na2O 0.4 � 0.75
Tricalcium Silicate C3S 45.0 � 60.0
Dicalcium Silicate C2S 12.0 � 25.0
Tricalcium Aluminate C3A 7.0 � 12.0
Tetracalcium Aluminoferrite C4AF 6.0 � 10.0