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Cement - Specification - 42.5 Grade

 

Specification - 42.5 Grade

Portland Cement construction grade 42.5

ACCORDING TO BRITISH STANDARDS BS EN 197-1:2000

OR ASTM C150-05 TYPE I-II OR SABS: SANS 50197; GOST N/R; SASO; SONCAP

CHEMICAL COMPOSITION

Loss of Ignition (LOI) 0.90

Silicon Dioxide (S102)21.0

Tricalcium Silicate (C3S) 60.0

Aluminum Oxide (A 1203) 5.30

Dicalcium Silicate (C2S) 15.00

Ferric Oxide (FE103) 3.30

Tricalcium Alumino Ferrice (C4AF) 9.76

Magnesium Oxide (MGO) 1.10

Tricalcium Aluminate (C3A) 8.05

Calcium Oxide (CAO) 65.60

Sulphur Trioxide (SO3) 2.70

PHYSICAL AND MECHANICAL PROPERTIES

Final setting time (VICAT) 135 minutes

Blain CM2/GR 3.250

Initial setting time (VICAT) 105 minutes

Autoclave Expansion 0.02

Compressive Strength: @ 03 days, 230 KG/CM; @ 07 days, 305 K; @ 28 days, 420 KG/CM

Compressive strength mortar Mpa (N/mm 2); @ 28 days; 42.5= 42.5 min.; 52.5= 52.5min.