| Chemical Formula / Property of Grey Cement | Value / Composition |
|---|---|
|
Synonyms
|
Portland cement, Ordinary Portland Cement (OPC), grey cement, construction cement
|
|
Manufacturer Reference
|
Lafarge, CEMEX, Heidelberg, UltraTech, local cement plants
|
|
Raw Material
|
Clinker (70-80%) + Gypsum (3-5%) + Limestone (5-15%) + Fly ash / Slag (optional)
|
|
Cement Grade / Standard
|
ASTM C150 Type I/II, EN 197-1 CEM I, IS 269 (OPC 43/53 grade)
|
|
Compressive Strength (28 days)
|
42.5 MPa – 62.5 MPa (depending on grade)
|
|
Fineness (Blaine)
|
280 – 350 m²/kg (OPC), up to 450 m²/kg for high early strength
|
|
Setting Time (Initial / Final)
|
Initial ≥ 45 min, Final ≤ 375 min (ASTM C150)
|
|
Main Chemical Compounds
|
C3S (45-65%), C2S (15-25%), C3A (5-12%), C4AF (5-12%)
|
|
Purposes & Applications
|
Concrete production, mortar, plaster, foundations, bridges, buildings, pavements, precast elements
|
|
Annual Production Volume (per plant)
|
Up to 3 million tons of grey cement per year (large integrated plant)
|
