Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002) requires covering within 12 hours after concrete pouring.

Concrete made of portland cement, ordinary portland cement or slag silicate water and mud shall be cured for at least 7 days, and concrete with retarding admixture or impermeability requirements shall be cured for at least 14 days. During the curing period, the best watering frequency is to keep the concrete wet, and the water for condensate curing should be the same as that for mixing.

Extended data:

Precautions:

The concrete surface shall be covered in time after being plastered twice and three times. After the final set of concrete, it should be fully wetted with water, sealed and covered with plastic film, and the surface of plastic film should be checked frequently, but when there is no water drop on the surface of the film, water should be sprayed again.

When pouring concrete, the construction should be carried out in strict accordance with the concrete mixture ratio, especially the slump should be strictly controlled, which has a great influence on the lateral pressure of the newly poured concrete. The pouring speed of concrete is also an important factor affecting the lateral pressure of fresh concrete. Therefore, in the calculation, the production and transportation capacity of concrete on site should be fully considered, and the pouring speed should be set correctly in combination with previous practical construction experience, and the construction should be carried out in strict accordance with the calculated pouring speed.

Baidu encyclopedia-casting in place