(1) After the completion of concrete pouring, the surface should be cured as soon as possible after the slurry is collected, and the newly poured concrete surface exposed to the atmosphere should be watered in time or covered with wet sacks and wet cotton felt for curing. If conditions permit, water storage or sprinkler maintenance should be adopted as far as possible.
(2) For concrete with water-binder ratio lower than 0. 45 and fly ash content of concrete, when pouring large-area components, the exposed working face should be reduced as far as possible. After pouring, the exposed working face should be closely covered with plastic film, and the film can be peeled off for water conservation after the final set.
(3) In the process of plastering and screeding after concrete pouring, it is forbidden to sprinkle water on the concrete surface, and excessive operation should be prevented from affecting the quality of surface concrete.
(4) The pouring temperature of concrete should be adjusted according to the air temperature, which should not be higher than the air temperature and not more than 30℃ in hot climate and lower than 12℃ in low temperature. In the process of construction and maintenance, the midpoint temperature of key sections and the surface temperature about 5 cm away from the surface are measured, and strict temperature control is implemented.
(5) When the ambient air temperature is lower than the surface temperature of the concrete being maintained by more than 20℃, the concrete surface must be covered with thermal insulation materials to reduce the cooling speed. Cast-in-place concrete should have enough moisture curing time.
(6) When the structure contacts flowing surface water or groundwater, waterproof measures should be taken to ensure that the concrete will not be washed away by water within 7 d after pouring.
(7) In addition to considering the strength of concrete during formwork removal, the temperature of concrete during formwork removal should not be too high to avoid cracking due to contact with air and cooling too fast. At this time, cold water curing is not allowed.
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