How long will the concrete be completed after the core formwork of precast hollow slab beam is removed?

Generally, there is no regulation, which has a great relationship with temperature. If the temperature is 28~35 degrees, it can be removed in 5~6 hours, and it takes 7~8 hours in winter. If the early strength water reducer is added, it can be properly advanced 1 hour, all after the initial setting time.

Time regulation for form removal:

1, the non-bearing side formwork can only be removed when the concrete strength can ensure that its surface and edges and corners are not damaged by formwork removal, and generally, the side formwork can only be removed when the compressive strength of concrete reaches 2.5MPa?

2, core mold and reserved channel internal model, should be in the concrete strength to ensure that its surface does not appear collapse and crack phenomenon.

Non-load-bearing side formwork can only be removed when the strength of concrete can ensure that its surface and edges and corners are not damaged by formwork removal, and generally, side formwork can only be removed when the compressive strength of concrete reaches 2.5mpa. There is no regulation. If there is no possibility of being touched by other things, the concrete will be fine after the final set.

Besides,? Non-load-bearing side formwork can be removed only when the strength of concrete can ensure that its surface and edges and corners are not damaged by formwork removal. In general, the side formwork can be removed only after the compressive strength of concrete reaches 2.5MPa.