Working in a low temperature environment, when the temperature reaches freezing point, the water in concrete will freeze, and the volume will increase rapidly in a short time after freezing, which will naturally destroy the structure of concrete, and at the same time, coupled with the dry climate, it will lead to cracks. Therefore, in general, when the outside temperature drops below 5℃, it is not recommended to continue concrete construction.
Concrete curing steam generator
However, this is only limited to the general situation. If artificial heating and moisturizing are adopted to a certain extent, such as steam heating and humidification of concrete curing steam generator, which provides conditions for the smooth hardening of concrete, construction can be carried out as usual at this time.
The second day after pouring concrete, the steam generator can still be maintained with concrete, because the construction period is tight, the formwork has to be dismantled quickly, and the best maintenance time has been missed. In addition, water can be sprayed for natural conservation, but the water temperature should not be too low.
Steam curing of precast box girder
To sum up, when the outside air temperature is lower than 5℃ for five consecutive days, it is necessary to steam the precast box girder. Steam curing concrete with high temperature steam generated by steam generator provides conditions for concrete hardening and can better maintain its strength.