Why curing is needed:
Concrete is an extensively used building material due to its strength, durability, and low cost. However, for concrete to achieve its maximum strength and durability, it must undergo a curing process. This is the process by which moisture is retained within the concrete material to aid in its proper hydration and hardening.
Various methods adopted for curing:
Among the various methods adopted, one is to cover it with plastic sheets. This involves covering the freshly poured concrete surface with sheets of plastic, burlap or other materials to prevent water from evaporating too quickly from the surface. This ensures that the moisture stays within the concrete and facilitates the hydration and hardening process by allowing more water to be available for the cement particles to react with.
Curing by covering concrete with sheets:
It's usually advisable to keep the concrete covered with sheets for about 5 to 7 days after pouring. In hotter and drier climates, however, the period may need to be extended. As the concrete slowly compresses, the vapor-tight cover should be removed, allowing the surface to slowly dry. This allows the hardened concrete to develop its intended strength, resist cracks or shrinkage and provide the desired level of durability to the structure in question.
Advantages of the method:
This method is an effective one to ensure the concrete's strength and durability. This method of concrete curing is widely used in the construction industry because it's economical and requires minimal effort. However, the timing and type of cover have a considerable impact on the curing process, and it is essential to ensure that you follow the right procedures to get the desired outcome.
Disdvantages of the method:
There are some disadvantages too and listed some of them.
1. Poor Breathability: Plastic sheets do not allow concrete to breathe, which can result in the accumulation of moisture inside the concrete. This can lead to the formation of mold and mildew, and deterioration of the concrete over time.
2. Inconsistent Temperature: Plastic sheets can cause the temperature of the concrete to become inconsistent, which can lead to cracking and other forms of damage.
3. Difficulty in Inspection: During the curing process, it is important to inspect the concrete regularly to ensure that it is curing properly. However, plastic sheets make this difficult as they need to be removed each time the inspection is carried out.
4. Environmental Concerns: Plastic sheets are not biodegradable and can have a negative impact on the environment if not properly disposed of.
5. Cost: Although plastic sheets are inexpensive, the cost of transportation and disposal can add up significantly over time. Additionally, alternative curing methods may be more effective and cost-efficient in the long run.
