SPECIFICATIONS
GREY PORTLAND CEMENT FOR CONSTRUCTION GRADE 42.5 N/R
GREY PORTLAND CEMENT CONSTRUCTION GRADE 42.5 ACCORDING TO BRITISH 12/1996 OR ASTM C 150
CHEMICAL COMPOSITION Silicon Dioxide (SiO2) 20.8 – 21.5 Aluminum Oxide (Al2O3) 5.30 Ferric Oxide (Fe2O3) 3.25 – 3.5 Calcium Oxide (CaO) 65.60 Magnesium Oxide (MgO%) 1.7 – 3.0 Sulphur Trioxide (SO3) 2.7 – 3.0 Loss Of Ignition (LOI) 1.8 – 3.0
Insoluble Residue % 0.1 – 0.7 Tricalcium Silicate (C3S%) 50.0 – 54.4 Dicalcium Silicate (C2S%) 14.2 – 18.2 Tricalcium Aluminate (C3A%) 6.0 – 6.8 Tricalcium Alumino Ferrice (C4AF%) 11.6
Chromium (Cr%) 2.0 Max. PHYSICAL AND MECHANICAL PROPERTIES Blain CM2/GR 3.250 Autoclave Expantion 0.02
Normal Consistency % 27.5 Initial Setting Time (Hours:Mins) 3.25 – 4.50 Hard Set (Hours:Mins) 4.54 – 6.00
Fitnes Index (CM2/GM) 2800-3040
COMPRESSIVE STRENGTH ISO/EN 197-1/2000 BS 4550 MORTAR
@ 03 DAYS 2.65 – 34.2 KG/CM2
@ 07 DAYS 37.3 – 42.5 KG/CM2
@ 28 DAYS 52.8 – 54.6 KG/CM2
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