Description:
Portland Grey Cement 42.5, please see detailed description for alldetails.SPECICATION OF CEMENT 42, 5 R ORIGIN :RUSSIA / UKRAINE / INDONESIA/
SOUTH AMERICA
Grey Portland cement for construction grade 42.5 R asour following specification
chemical composition: Portland cement Type I or 2 42.5 Raccording to BS 12 / 1996 or
ASTM - C 150
Silicon dioxide 20, 5 % minimum
Aluminium Oxide ( Al2O3 4, 3 % to 6, 0 % maximum
Iron oxide ( Fe 2O3 ) 3, 8 % to 6, 0 % maximum
Calcium Oxide ( CaO ) 62, 2 % to 67, 0 % maximum
Magnesium Oxide ( MgO ) 1, 10 % minimum
Sulfur trioxide ( SO3 ) 2, 7 % ASTM C 563 optimum 3, 0 %maximum
Loss on Ignition 1, 10 % to 3, 0 % maximum
Insoluble Residue 0, 2 % to 0, 75 % maximum
Alkalies as Na 2O 0, 45 % to 0, 6 %
Tricalcium Silicate ( C3S ) 8, 0 % to 9, 8 % maximum
PHYSICAL ANALYSIS
Blaine surface, m2/kg 370 to 380
% passing 325 mesh sieve 95, 1 to 93, 5
Vicat Set, minutes
Initial 115 not less than 45
Not more than 375
Final 235
Air content 7, 7 % 12 % maximum
Autoclave Expansion 0, 02 % to 0, 8 % minimum
Compression Strenght, p.s.i. ( Mpa )
1 day 2430 ( 16, 8 ) > 2100
3 days 230 KG / CM2
7 days 305 KG / MC2
28 days 420 KG /CM2
SPECICATION OF CEMENT : 42.5 N ORIGIN : RUSSIA /UKRAINE / INDonESIA /
SOUTH AMERICA
Grey Portland Cement for construction grade 42.5 N asour following specification
Chemical composition : Portland cement Type I or 2 ,42.5 N according to BS 12 /1996
or ASTM - C 150
Silicon dioxide ( sio2 ) : 21.00
Aluminium Oxide ( a12o3 ) :5.30
Ferric oxide ( fe2o3 ) : 3.30
Calcium Oxide ( cao ) : 65.60
Magnerium 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 ferric ( c4af ) : 9.76
PHYSICAL AND MECHANICAL PROPERTIES
Blain cm2/gr : 3.250
Autoclave expansion : 0.02
Initial setting time ( vicat ) : 105 minutes
Final setting time ( vicat ) : 135 minutes
Compressive strengh @ 03 days 230 kg/cm2 @ 07 days 305 kg / cm2and @ 28 days 420
kg/cm2
PRODUCT PACKING
In 50kg bags, or 1000kg big bags or in bulk.
Other grades of cement are:
PORTLAND GREY 32.5
PORTLAND GREY 52.5
Spec sheets are available when an LOI or ICPO have beenfilled in correctly constituting firm and seriousorders.
