What are the methods of concrete curing? There are several methods of curing cement concrete

Concrete curing.

It is artificially caused by certain humidity and temperature conditions, so that the newly poured concrete can be normal or accelerate its hardening and strength growth. The fact that concrete can gradually harden and increase in strength is the result of cement hydration, which requires certain temperature and humidity conditions. If the surrounding environment does not exist for such conditions, the concrete needs to be cured manually.

Concrete curing methods are: 1. Natural curing: sprinkling water curing and spraying plastic film curing.

The former covers the concrete with straw curtains, etc., and often sprinkles water to keep it moist. The curing time depends on the cement type, such as ordinary Portland cement.

concrete not less than 7 days and nights. The latter is suitable for high-rise structures and large-area concrete structures that are not easy to be cured by sprinkling, etc., and the perchloroethylene resin plastic solution is sprayed on the surface of the concrete with a spray gun, and a thin film is formed on the surface of the concrete after the solution volatilizes, isolating the concrete from the air, preventing the evaporation of water in the concrete, ensuring the normal progress of cement hydration, and the film can age and fall off by itself after the curing is completed. 2. Steam curing

Place the concrete member in a saturated steam filled with saturated steam.

or in the curing chamber of a mixture of steam and air, which accelerates the hardening of concrete in a higher temperature and humidity environment. The curing effect is related to the steam curing system, which includes: steam curing before static time, heating and cooling rate, curing temperature, constant temperature curing time, relative humidity.

Wait. The steam curing chamber has pit type, vertical kiln type and tunnel kiln type.

Water curing: covering plastic cloth for water retention and moisturizing, covering grass curtain sprinkling curation, flower tube water curing, intermittent sprinkling curing.

Steam curing: pipeline steam curing, spray steam curing.

Burial and maintenance: bury with soil and sawdust.

Moisturizer spray curing.

Answer: Natural curing and steam curing are often used in concrete curing. The former method refers to spraying plastic film for curing or spraying water for concrete. In the environment of higher temperature and humidity, concrete will accelerate hardening, steam curing is to use the characteristics of concrete, concrete is placed in a mixture of steam and air or a curing chamber filled with steam.

Under certain humidity and temperature conditions, concrete will harden normally or at an accelerated rate and increase its strength. Therefore, if you want to make the curing effect of concrete good, you need to pour it artificially.

The curing method of covering the concrete with an item such as a straw curtain and then sprinkling water to keep it moist is called sprinkling curing. The curing time of different varieties of cement is also different, so pay attention to the number and time of sprinkling. In high-height structures and large-area concrete structures, etc., plastic film is commonly sprayed for curing, and the vinyl chloride resin plastic solution is sprayed on the surface of the concrete by using a spray gun to form an impermeable film on the surface of the concrete, isolating the air, preventing water evaporation, and ensuring the normal hydration of cement, and the layer of impermeable film will fall off by itself after the curing is completed.

The protective effect of steam curing is related to the standing time, heating and cooling rate, curing temperature, constant temperature curing time, relative humidity and so on. If these aspects are done well, then the concrete will be well maintained.

After the concrete is poured, if the weather is hot and the air humidity is too low, the concrete is not cured in time, the cement particles can not be hydrated normally and cannot be converted into stable crystals, and the cohesive force is not as good as the normal hydrated concrete, resulting in flake or powder falling off.

1. Adopt measures such as improving aggregate gradation, using dry and hard concrete, mixing mixture, adding air entraining agent or plasticizer to reduce the amount of cement in concrete.

2. When mixing concrete, add water or cool the gravel with water to reduce the pouring temperature of concrete.

3. Reduce the pouring thickness when pouring concrete in hot weather, and use the pouring layer to dissipate heat.

4. Bury water pipes in concrete to cool people with cold water.

1. Watering and sprinkling for maintenance. This is the easiest way to do it, and the number of people to choose from is also very large. You only need to sprinkle water at a fixed time every day, and it is best to make a ** first to determine the sprinkling time, so as not to forget the situation.

2. Pour the curing solution into the container. Then spray it on the surface to form a protective film, and finally it can also achieve the purpose of curing. It is recommended to go directly to the local store to buy the maintenance solution, since it is a chemical product, so remember to take protective measures when using it.

3. Directly spread the plastic film on the surface. It can prevent water loss, and it can play a role in maintenance. This method is more economical, and the quality of plastic film is not high, which will not increase your cost.

Summary. There is a kind of maintenance called natural curing, which means that the concrete needs to be put into the mold, wrapped with the mold, and at the same time, it is necessary to constantly water or sprinkle water to moisturize. Generally speaking, after one or two days of concrete pouring, the formwork is loosened and the watering is continued until it reaches a certain strength.

Oh, this is a method of natural conservation, that is to say, with a membrane shell for maintenance, usually means pay attention to regular watering.

How many ways are there to cure concrete?

There is a kind of maintenance called natural curing, which means that the concrete needs to be put into the mold, wrapped with the mold, and at the same time, it is necessary to constantly water or sprinkle water to moisturize. Generally speaking, after one or two days of concrete pouring, the formwork is loosened and the watering is continued until it reaches a certain strength. Oh, this is a method of natural conservation, that is to say, with a membrane shell for maintenance, usually means pay attention to regular watering.

Another is to use curing film, which is a polymer material, the surface is a film, and then it is formed by adhesion and compounding. The material of this polymer is equivalent to having enough water, and after absorbing water, it can become a transparent body, turning the flowing water into solid water, and continuously penetrating into the concrete surface. This curing method can effectively prevent the occurrence of cracks and ensure the strength of the concrete.

Also, especially in summer, the water volatilizes quickly, and before the concrete is prefabricated, it is covered with a layer of straw curtain, which can keep it moist to prevent excessive evaporation of water, and then water it regularly.

Of course, cement concrete also needs to be added regularly during the maintenance period, and it cannot be separated from the water.

1. Necessity: The development of concrete strength depends on the hydration status, and temperature and humidity are important factors affecting the speed and degree of cement hydration, so after the concrete is poured and formed, it is necessary to maintain the appropriate temperature and sufficient humidity within a certain period of time to fully hydrate the cement. 2. Maintenance method:

In summer, it is mainly sprinkled, and in winter, it is mainly mulched. In winter, it is warmed by the covering, and if you water it in the case of freezing in the winter, it will freeze and damage the concrete. Of course, the construction will be stopped in the case of extreme low temperatures.