Concrete curing is implemented as soon as the concrete has been poured, regardless of the weather conditions. Curing allows concrete to acquire its properties of durability, waterproofing, compressive strength, freeze / thaw resistance and dimensional stability. The curing of concrete is therefore of great importance.
The role of concrete curing
The role of concrete curing is important because curing minimizes evaporation at the start of the concrete setting phase.
A lack of water in the concrete causes a decrease in the internal chemical bonds, cohesive forces between the elements of the concrete, and thus decreases the strength of the concrete.
Too rapid evaporation increases the porosity of the concrete, leaving empty spaces in the concrete structure. The water can then become lodged in these created spaces and thus reduce the durability of the concrete. Likewise, too rapid evaporation can cause concrete to crack. The water can then penetrate through the cracks generated and attack the reinforcement of concrete, which reduces the strength of the structure, and therefore its sustainability.
The different treatment methods
- Whatever the type of surface to be treated (paving, vertical walls, curved beams), concrete curing is possible.
- Vaporization of curing products
- A product is sprayed manually or mechanically on fresh concrete or on concrete surfaces after form stripping. These products are composed of wax, resins, rubber.
- Watering and spraying water
- Watering or water spraying is used when the temperature is ≥ 10 ° C and the humidity is low.
- Use of water tables and concrete immersion
- The use of water tables and the immersion of concrete are employed on flat surfaces. This keeps the concrete at a uniform temperature.
- Laying a plastic film on the surface or a waterproof canvas
The installation of a plastic film on the concrete surface or an impermeable canvas on the concrete reduce the need for continuous water supply, they prevent water from evaporating. An expert wax emulsion Selangor supplier can advise on this better.
Duration of treatment
The cure period is 3 to 7 days; it may be longer if the temperature is lower, and lasts as long as it takes for the concrete to achieve 40% to 70% of the specified compressive strength depending on the concrete class. Cements that develop rapid strength are less sensitive to curing than slow-setting cements.
Importance of the cure, consequences and price
The curing of the concrete must not be neglected at the risk of exposing yourself to damage to the structure, both aesthetic damage and damage to the durability of the structure.
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