How many days can the concrete be taken out of the formwork?
1. If the side membrane is removed, the formwork can be removed the day after the concrete is poured. However, this time is definitely not fixed. It is also necessary to combine the molding of concrete, the actual situation, the climate at that time and the strength of concrete. If the temperature is not particularly high that day and it has not solidified well, you need to wait for a few more days and then dismantle the mold three days later. When dismantling the formwork, care should be taken not to damage the concrete structure.
2. If it is a basement membrane, it needs to bear a certain weight because the concrete is not formed. At this time, it will be decided according to the strength and span of concrete. Because the strength of concrete will be different, if the span is less than two meters, the strength should reach 50%. If the span exceeds 8m, the strength needs to reach 100%. If it is a cast-in-place beam, when the span is less than 8 meters, the strength needs to reach 75%.
How long is the specific form removal time?
1. If it is poured on the main beam frame of the building, it will take at least 4 to 5 days to dismantle the formwork after pouring.
2. If the roof is inverted, the waiting time will be longer. In general, it takes more than 5 days. The formwork cannot be put into use immediately after it is dismantled, and it will take 10 days to dismantle it.
3, the difference of the template will also affect the demolition time. The demoulding time will be different with different sizes. If the template is less than 2 meters, the polishing time is generally 3~4 days.
5 to 7 days if it is more than 4.2 meters and less than 8 meters. If the width reaches more than 8 meters, the required time is about 10 day.
Concrete curing for 7 days or 14 days?
1, in the construction process, the maintenance project needs a lot of time, which directly affects the quality of concrete, and will increase slightly in the process of slow hardening. This is because of the hydration of cement, and the condition of cement hydration is that it must maintain humidity and temperature, which can only be done by human intervention.
2. In order to ensure the strength of concrete and the cracks on the surface caused by drying, it is necessary to maintain the surface. Usually, the common maintenance method is watering. If the water is not replenished in time, the cement will be short of water in the hardening process, resulting in cracks, which will be slightly reduced.
3. Cement will heat up when it meets water. Therefore, if water evaporates quickly in the solidification process after pouring, it will affect the solidification effect and structural stability. However, glue should also pay attention to environmental changes. Usually, when the temperature is lower than 4 degrees, the water curing method cannot be used, so the water evaporates slowly and is not easy to evaporate, and the steam curing method can be used.
The above is the related content of "How many days can concrete be removed in general" compiled by Bian Xiao, and concrete removal usually takes 10 days.