For portland cement, ordinary portland cement and other concrete, the curing time can not be less than seven days; If retarder and impervious material are added to concrete, it can't be less than 14 days.
Care should be taken when curing concrete:
The times of concrete pouring must be handled according to the state of concrete. If the concrete is in a very wet state, there is no need to water it, and then water it until the concrete is dry.
When curing concrete, do not splash water on it. In the process of boiling water, you can spray it to keep the concrete wet.
During each curing, the concrete can be covered with plastic bags, rags, cotton cloth, straw and other materials.
When the concrete reaches a certain level, you can't step on it. When curing concrete, templates and supports must be installed. When installing, step on the bracket, not on the concrete. Note that if the average temperature of the day is lower than five degrees, you can't water it, and you can't leave the concrete in an excessively wet state.