First of all, the curing method should be reasonable according to the type, environment and temperature of concrete;

Secondly, water spraying is used for curing at normal temperature, and plastic film is used for covering curing at high temperature; When the temperature is low, cover the concrete surface and the outer side of the formwork with thermal insulation materials with straw bags, sawn wood and sacks for maintenance;

Third, some technical measures for maintenance:

1, ordinary concrete, after pouring 12 hours for covering and moisture curing;

2, using plastic film curing concrete, the exposed surface is fully covered tightly, and there is condensed water in the plastic film;

3, Portland cement, ordinary Portland cement, slag Portland cement curing time shall not be less than 7 days;

4. The curing time of concrete mixed with accelerator or impermeability requirements shall not be less than 14 days;

5. When high-strength concrete is used, it should be covered with water for curing at 1~2h after the final setting, and the curing time is the same as that of ordinary portland cement and concrete mixed with additives (during the curing period, the watering times should be limited to keeping the concrete wet all the time);

6. For the waterproof concrete, it must be covered and watered 4~6 hours after pouring (in winter, heat storage method and greenhouse method should be adopted for maintenance, and the concrete surface should be kept wet to prevent early dehydration of concrete);

7. When the concrete construction temperature is lower than 5℃ in winter, the concrete surface and the outside of the formwork should be covered with straw bags, sawn wood, sacks and other thermal insulation materials for maintenance;

8, when the temperature is lower than 5℃, it is forbidden to water the concrete surface maintenance;

9. During maintenance, it is forbidden to apply load or construction on the upper part.

Extended data

function

The roof is the envelope structure covering the top floor of the building, and it is also the load-bearing structure of the upper floor of the building. At the same time, it also plays a horizontal support role for the upper part of the building.

(1) bearing load

The roof should bear the load of itself and its upper part, including the load of wind, snow, equipment, components, vegetation and people moving on the roof. These loads are transferred to the foundation through the lower wall or column.

(2) Enclosure function

Roof is an important enclosure structure, which forms an indoor space with walls and floors, and can resist the influence of natural wind, frost, rain, snow, solar radiation, temperature changes and various external unfavorable factors on the building.

(3) Modeling function

The shape of the roof plays a very important role in the overall modeling of the building. Both the unique "anti-cornice" of traditional buildings in China and the churches and palaces with various slopes in western traditional buildings have become the cultural symbols of their traditional buildings, with symbolic modeling characteristics. It can be seen that the roof is one of the core elements of the overall architectural modeling, and it is also the most important content in architectural modeling design.