Can the concrete be covered with plastic film in summer?
After pouring concrete, such as hot weather, air drying, maintenance is not timely, concrete in the water will evaporate quickly, dehydration phenomenon, which has formed the gel cement particles can not be fully hydrated, can not be converted into stable crystalline, the lack of sufficient bonding force, which will appear on the surface of the concrete spalling flake or powder the influence of concrete strength. In addition, when concrete does not have enough strength, the premature evaporation of water will cause greater shrinkage deformation, and dry shrinkage cracks will affect the integrity and durability of concrete.
Summer maintenance to cover the film..And the film should be sprinkler maintenance,First, because the temperature of concrete and the internal temperature can not be too different,Otherwise, thermal stress. Internal expansion. External contraction. Produces cracksSecond. The hydration heat of the cement needs only twenty percent of the actual water, and the rest will evaporateAll water evaporates to form a contractionWe are here it is. For example, a pier pier. All set on film.Then put a bucket on top and fill it with water,Slowly drop, let the water covered pier surface. The surface temperature is reduced.
Plastic film is required.Concrete, can gradually hardening is mainly because of the effect of water cement hydration, and requires proper temperature and humidity conditions, so in order to ensure the concrete has hardened the proper conditions, the growing intensity must be maintenance of concrete. Covering curing is the most common method of keeping warm and maintaining moisture.
