Cement

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Ordinary Portland Cement (OPC) is the most commonly used cement for a wide range of applications, including:

UDAYA EXPORTS OPC Cement is used in producing:

UDAYA EXPORTS OPC Cement is classified into four grades based on 28-day cube compressive strength:

OPC 33

OPC 53

Used in high-grade, high-performance structural applications:

OPC 53-S

Special grade designed for prestressed concrete railway sleepers only

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Feature	OPC 43	OPC 53
28-day Strength	430 kg/cm²	530 kg/cm²
Common Use	General-purpose cement	High-speed constructions, bridges, multistory buildings
Setting Time	Moderate	Quick
Hydration Heat	Low	High (requires adequate curing)
Cost	Lower	Slightly higher

Key Notes:

Grade 53 develops strength quickly but may have micro cracks if not cured properly.
Grade 43 develops strength gradually, with minimal surface micro cracks.

Heat of hydration is lower than OPC, making it suitable for massive constructions.
Reduces risk of cracks due to thermal stress.
Improves durability in coastal and marine structures.
Better resistance to chlorides, sulphates, and aggressive chemicals.
High long-term compressive strength; gains strength gradually up to one year.
Gives smoother finishing to structures.
Low porosity and dense concrete for enhanced durability.
High workability and slow setting due to improved water retention.
Environmentally friendly – reduces greenhouse gas emissions.
Reduces corrosion risk of reinforcement steel.