First of all, according to different cement additives, the time of water spraying curing will be different. Generally, it takes about a week for ordinary portland cement to be cured by water spraying, but for cement with impermeability requirements or mixed with retarding materials, the water spraying curing time should be more than two weeks.

It must be covered within 12 hours after concrete pouring, and sawdust, plastic sheets and straw curtains can be used. This can prevent the evaporation of water on the concrete surface and reduce the concrete falling off and deformation. At the same time, sprinkler maintenance should be moderate, and the time should not be too short or too long. Too short a time can not achieve the effect of water spraying curing, and too long a time will cause irreversible shrinkage of cement to become larger, but it is easy to crack.

Do not eat heavy water or spray water intermittently when spraying water for maintenance. Because it is easy to cause sudden change of cement temperature difference, it is easy to cause cement cracking. It is best to spill the water slowly.