Steam Curing:

The hydration of cement accelerates along with increase in temperature that leads to faster development and strength.

To steam curing, a concrete is subjected to higher temperature by maintaining the required wetness.

For concrete mixes with water-cement ratio ranging from 0.3 to 0.7, the increased rate of strength development can be achieved by resorting to steam curing. The mixes with low water-cement ratio respond more favorably to steam curing than mixes with higher water-cement ratio. In steam curing, the heating of the concrete products is caused by steam either at low pressure or high pressure. Steam curing is preferred for precast concrete products. These precast members are passed by the steam chambers. It is also used, when early removal of formwork is required to put the structure in sense without delay.