Methods of Curing
- Water Curing
- Immersion – Precast
- Ponding – slabs, pavements
- Sprayings – plasters, vertical concrete
- Wet-covering (saw-dust, sand, jute, etc) – vertical surface, concrete in difficult position
- Membrane Curing
- Concrete covered with thin membrane to prevent evaporation loss.Generally used after 2-3 days of water-curingUseful in inaccessible areasA thin impervious layer is created on the surface of the concrete.
- Example Bitumen, polyethylene, water-proof paper, rubber compounds, etc.
- Application of Heat
- Steam curing gives uniform temperature – no differential expansion crack
- Fast method, and useful in congested area.
- Useful in pre-cast industry
- Heat increases the rate of hydration as-well.
- Miscellaneous
- Chemicals like calcium chloride are used as surface coating. It absorbs moisture from atmosphere as stays wet for longer period.