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How does concrete resist plastic shrinkage?
Plastic shrinkage in concrete occurs when fresh concrete loses moisture rapidly, leading to surface cracks. To resist this, several strategies are employed. First, proper curing methods like wet curing or using curing compounds help retain moisture, allowing the concrete to hydrate fully. Second, controlling the evaporation rate by shielding the surface with windbreaks or misting reduces water loss. Additionally, incorporating fibers or shrinkage-reducing admixtures enhances the concrete's tensile strength, minimizing crack formation. Lastly, optimizing the mix design with fine aggregates and low water-cement ratios improves cohesion. These measures collectively ensure durable, crack-resistant concrete structures.
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