1, the curing time of all cement concrete components shall not be less than 7 days, and the main components shall not be less than 14 days.

2. The method of covering and moisturizing shall be adopted for maintenance, and the special person shall be responsible for the maintenance to ensure that the surface of the component is always in a wet state during the maintenance. ?

3. All components shall be covered with straw bags (sacks) for water conservation. If it is covered with plastic film and solidified by spraying curing agent, it should be approved by the supervision engineer. When covering and curing with plastic film, water is injected into the film 2~3 times a day, and when curing with curing agent, water is sprayed on the surface 2~3 times a day.

4, winter construction and maintenance, must be carried out in strict accordance with the requirements of winter construction and maintenance. L Strictly check the water quality of curing water to prevent sewage from damaging components.