Concrete foam repair is not a simple job both industrial and private construction. However, many inexperienced workers who specialize in the repair or construction of buildings neglect the maintenance of the concrete surface, believing that pouring is the final stage. Meanwhile, the provision of conditions for the correct hardening of the solution allows you to guarantee the maximum strength and durability of the structure being erected.
Basic Rules After Concrete Foam Repair
It is believed that concrete acquires the required strength precisely at the stage of hardening (maturation). For this reason, you should treat the surface with the utmost scrupulousness, ensuring:
- the minimum shrinkage rate of the solution poured into the formwork;
- protection of the structure from temperature drops;
- sufficient moistening of the surface before hardening to avoid cracking;
- protection against exposure to chemicals or mechanical stress.
Foam Repair – Formwork
It is categorically not recommended to dismantle the formwork structure until the structure has gained 70% of its strength. In order for the process to proceed at the proper level, immediately after pouring, it is necessary to inspect the formwork for leaks or geometry violations. It is possible to eliminate the shortcomings in the first two hours after laying the
mortar: the mixture should not give in to shaking at the time of setting.
Microclimate
Another important aspect is the creation of optimal microclimatic conditions. After pouring the solution into the formwork, the surface should be covered with a film, preventing it from drying out in hot weather and freezing in winter. Recommended humidity for solidification is 90%. Providing such indicators guarantees that the concrete has the required strength and stability indicators.
Hydration
In no case should you speed up the concrete hardening process using a hairdryer or similar equipment. Such a solution will only harm the structure, because, without gaining the required strength, the solution can exfoliate or crumble. Among other things, the resistance of the structure to chemical, atmospheric, mechanical influences decreases, and the risk of shrinkage cracks formation increases.
To avoid such consequences, it is necessary to cover the surface with a film for at least 8 hours. After removing the polyethylene, the screed must be moistened by spraying with water. Such measures must be taken if the air temperature is above +5 degrees.
If the ambient temperature is below +5 degrees, it is not required to take measures to moisturize the structure. On the contrary, the surface must be additionally insulated by covering it with rags, sawdust, etc.
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