Curing - maintenance of a satisfactory moisture content and temperature in concrete for a suitable period of time immediately following placing & finishing so that the desired properties may develop.
Factors that effect curing:
* MoisturePenetration resistance vs time of concrete
Compressive strength vs age of concrete: (laboratory)
Compressive strength vs age of concrete (at different temperature)
Concrete strength gain versus time for concrete exposed to outdoor conditions. Concrete continues to gain strength for many years when moisture is provided by rainfall and other environmental sources.
During the first week to 10 days of curing it is important that the concrete not be permitted to freeze or dry out.
In practical terms, about 90% of its strength is gained in the first 28 days.
Concrete compressive strength depends upon many factors:
* Quality and proportions of the ingredients.
* The curing environment.