Uneven surfaces or inconsistent thickness in the waterproof coating can lead to an uneven and unsmooth finish. After pouring the concrete curing liquid, if the surface is only roughly scraped with a shovel without being properly troweled, it results in a rough texture. Additionally, if the formwork is not supported on a firm soil layer or the support area is insufficient, or if the supports are loose or soaked, the concrete may not gain enough strength during early curing. If workers walk on or transport materials onto the surface before the concrete reaches a minimum strength of 1.2 N/mm², this can cause surface irregularities. It's essential to follow construction specifications strictly, ensuring that the screed is leveled and compacted according to horizontal control marks or elastic lines. After the final setting of the waterproof coating, proper watering and curing should be carried out. The formwork must have sufficient strength, rigidity, and stability, and it should be placed on a solid foundation with adequate support. Prevent water exposure to avoid settling. When pouring the concrete curing liquid, regular inspections should be conducted, and walking on the poured structure should only occur once the strength reaches at least 1.2 N/mm².
At the corners of structures or components, the concrete curing liquid may sag or appear irregular due to inadequate wetting of the wooden formwork. Poor maintenance after pouring can lead to dehydration, reduced strength, or template swelling, resulting in cracks at the corners. When removing the formwork, the edges and corners may break off if the concrete isn't strong enough. In cold-weather construction, non-load-bearing formwork may be removed too early, leading to damage. During formwork removal, external impacts or heavy objects can damage the edges, especially if protection is lacking. If the formwork isn’t coated evenly with a release agent, it can also cause issues. Before pouring the waterproof coating, the wooden formwork should be fully wetted. After pouring, careful watering and curing are necessary. Non-load-bearing formwork should only be removed once the concrete has reached at least 1.2 N/mm² in strength. When removing the formwork, care should be taken to protect the edges and avoid excessive force. The formwork should be lifted carefully to prevent corner damage. When transporting, finished corners should be protected using straw bags to avoid impact. Any loose particles can be trimmed away. If the area is fully saturated, damaged sections can be repaired using 1:2 or 1:2.5 cement mortar, matching the original concrete curing liquid as closely as possible. A horizontal or vertical layer of loose mixed soil may also appear within the concrete curing fluid, which requires attention and proper treatment to ensure structural integrity.
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