| Item | Curing Period | Note |
|---|---|---|
| OPC (33, 43, 53 grade) | 7 days | IS 456 Clause 13.5.1 |
| PPC (Portland Pozzolana Cement) | 10 days | Slower strength gain |
| PSC (Portland Slag Cement) | 10 days | Slower strength gain |
| Rapid Hardening Cement | 3 days minimum | Achieves 7-day strength in 3 days |
| Low Heat Cement | 14 days | Very slow hydration |
| Sulphate Resistant Cement | 10 days |
| Item | Curing Period | Note |
|---|---|---|
| Mild exposure (interior) | 7 days (OPC), 10 days (PPC/PSC) | |
| Moderate exposure | 7 days (OPC), 10 days (PPC/PSC) | |
| Severe exposure | 10 days minimum | Continuous moist curing recommended |
| Very Severe exposure | 14 days minimum | Ponding or wet hessian |
| Extreme exposure (marine/chemical) | 14 days minimum | Curing compound + wet curing |
| Item | Curing Period | Note |
|---|---|---|
| Footing / Raft | 7–10 days | Ponding method preferred |
| Column | 7–10 days | Gunny bag / hessian wrapping |
| Beam | 7–10 days | Wet hessian or curing compound |
| Slab (floor) | 7–10 days | Ponding is best method |
| Slab (roof/terrace) | 10–14 days | Exposed to sun — needs longer |
| Staircase | 7–10 days | Wet hessian + plastic sheet |
| Retaining Wall | 14 days | Critical for durability |
| Water Tank | 14–21 days | Impermeability depends on curing |
| Plastering (cement) | 7 days | Light sprinkling |
| Brickwork (with cement mortar) | 7 days | Sprinkling water |
| IPS / Terrazzo Flooring | 7–10 days | |
| Precast elements | 3–7 days | Steam curing may be used |
| Item | Curing Period | Note |
|---|---|---|
| Ponding (most effective for slabs) | — | 50mm water on slab surface, build bunds with mud |
| Wet hessian / gunny bags | — | Keep continuously wet, re-wet 3–4 times/day |
| Sprinkling water | — | 3–4 times/day minimum, more in summer |
| Curing compound (membrane) | — | Apply within 2 hrs of finishing, 200–300 g/m² |
| Plastic sheet covering | — | After initial set, prevents evaporation |
| Steam curing (precast) | — | 60–80°C for 12–16 hrs, then gradual cooling |
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