The newly poured concrete is still plastic, so it needs to be soaked in water for curing. Excess water enters the concrete, which increases the water-binder ratio and reduces the strength of the concrete surface, because it cannot be solidified by soaking in water. Newly poured concrete can be covered with plastic film to keep moisture. If it is found that the surface water loss is serious, it can be repaired by spraying. Strictly speaking, the curing of concrete should be carried out after 24 hours, that is, after the final setting of concrete. If it is in summer and high temperature season, static water curing can be carried out after the initial setting of concrete.