Aggregates & Materials
PSC (Portland Slag Cement)
// Definition
OPC blended with GGBS (25-65%). Excellent for sulfate and chloride environments — common in coastal, marine, and aggressive soil conditions.
PSC has very low heat of hydration and high sulfate resistance. Strength develops slowly initially but reaches high long-term strength with proper curing.
// Related Indian Standards
IS 455
// Cross-references
Heat of Hydration
The heat released as cement reacts with water. Important for thermal control in mass concrete to avoid cracking from temperature gradients.
OPC (Ordinary Portland Cement)
The most common type of cement, manufactured by grinding clinker with gypsum. Available in three grades in India: 33, 43, and 53 (compressive strength in MPa at 28 days).
GGBS (Ground Granulated Blast Furnace Slag)
A by-product of iron manufacturing, ground to cement fineness. Used as a supplementary cementitious material at 25-65% replacement of cement.
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