How long can the cast-in-place slab be demoulded in 20 degrees weather?

In the weather of 20 degrees, the cast-in-place slab can be demoulded within one week.

Extended data:

For the cast-in-place floor slab, it can be dismantled in a few days, which can only be decided according to the change of seasons. If the construction is carried out in winter, the temperature is relatively low, so the growth of concrete will be slow, and it is necessary to extend the formwork removal time by about two weeks. But in summer, because the temperature itself is relatively high and affected by humidity and temperature, the demoulding time will be accelerated.

Basically, the mold can be removed in a week. At this time, the strength has reached the standard, and the formwork removal time in winter should not be too early, and the formwork removal time in summer needs to be advanced.

Cast-in-place floor requirements:

1. If cast-in-place floor slab is used, the floor slab thickness of rural self-built houses should reach a certain standard. According to Chinese standards, the range is between 80 ~ 160mm. The reason why there is such a big difference mainly depends on the size of the floor, including the standard of reinforcement.

2. The thickness of the cast-in-place floor slab cannot exceed the standard, otherwise it will lead to a relatively large self-weight, so it is necessary to consider adding beams, so this thickness needs to be calculated by the designer. Of course, there are certain errors, which are also allowed. The normal error range is between-5mm and+8mm.