(1) curing with formwork? Formwork can not only play a good role in thermal insulation, but also avoid a large temperature difference between the concrete surface and the external environment. Especially when the temperature drops suddenly, the formwork removal time should be strictly controlled, and other insulation measures should be taken when necessary. The formwork is in close contact with concrete to avoid water evaporation and has a certain moisturizing effect.

(2) Save water? Sprinkling maintenance is a common maintenance method, and the construction operation is simple. However, the average daily temperature in winter is lower than 5℃, which is not suitable for water conservation.

(3) Brush curing agent for curing? After the concrete structure is dismantled, the curing agent is coated on its surface to prevent water loss and play the role of water conservation. When painting curing agent, it should be painted evenly, and each coat should be painted vertically and horizontally. Check the integrity of curing agent coating frequently to keep the concrete surface wet. However, it should be noted that the curing agent is easy to crack due to external influence, which will affect the moisturizing effect.

(4) Curing by laminating? After concrete is cast or removed from formwork, plastic film is covered on the surface of concrete to prevent concrete from losing water, which is beneficial to concrete hydration and ensures moisture retention and curing effect. When pasting the film, it should be noted that the plastic films should overlap well to ensure that the films are tightly closed, and the integrity of the film should be checked frequently to ensure that there are condensed water droplets inside the film.

Extended data:

Matters needing attention in winter concrete construction:

1, concrete transportation: the transportation time of concrete should be shortened as much as possible. The concrete tank should be completely wrapped with thermal insulation material, and the transportation mode of less running and more transportation should be adopted. Special personnel shall be arranged to be responsible for the contact between the construction site and the mixing station, so as to avoid parking on the construction site and traffic jams on the road and minimize the temperature loss of concrete.

2. Concrete pouring: Before pouring, the snow and dirt on the formwork and steel bar must be removed, and the joint surface of formwork, steel bar and new and old concrete should be preheated until the temperature reaches above 5℃. The pouring temperature of concrete should not be lower than 65438 00℃. Try to choose noon to pour, pay close attention to the weather forecast, and don't pour in strong wind, rain and snow.

Using the method of covering while pouring, after one section is wrapped, there must be enough space between the tarpaulin and the concrete surface to ensure that personnel can enter the surface receiving, calendering and brushing.