In general, the concrete poured in

In general, the concrete poured in winter should not be removed during the winter. If the formwork needs to be removed, it should also be determined according to the test results of curing the specimen in the same condition as the structure. It can be carried out after the concrete reaches the frost resistance strength and the strength of removing the formwork. It is absolutely forbidden to remove the form when the temperature of mass concrete is falling. After removing the form, the concrete surface should be insulated. For the heating curing formwork and insulation layer, should stop curing after the concrete cooling to 5℃ before demolition. If the temperature difference between the concrete and the outside world is greater than 20℃, the concrete surface after the removal of the mold should be temporarily covered to slow down the temperature of the concrete. In the process of removing the formwork, if the concrete is found to suffer frostbite, the formwork dismantling should be suspended, and the removal can be continued after treatment. For the concrete of the removed formwork, thermal insulation materials should be used to protect it.