What it is
OPC is made by burning limestone and clay into clinker and grinding it fine. It is sold in grades of 33, 43 and 53, the strength in N/mm² after 28 days.
Key points
- Gains strength quickly
- Gives off more heat while setting
- Common for structural concrete
- Needs good curing to avoid cracks
Why it matters
Fast strength helps the work move, but it needs careful curing in Chennai's heat.
How Elamentt handles it
The structural engineer sets where OPC is used; the brand is in your specification.