What is a potential solution to prevent shrinkage cracks?

Covering newly poured concrete with plastic is an effective method to prevent shrinkage cracks. This technique helps to retain moisture in the concrete during the curing process. When concrete dries too quickly, it can lead to shrinkage, which may cause cracks to form as the material hardens. By providing a barrier with plastic, you minimize evaporation, allowing the concrete to cure more evenly and slowly.

This method also protects the surface from environmental factors such as wind and sun, which can accelerate moisture loss. It is particularly advantageous in hot or windy conditions where the risk of rapid drying is heightened. In contrast, simply adding more water could lead to other issues, such as reduced strength and increased porosity. Increasing the sand content or using larger aggregates may alter the concrete mix design but won't directly address the concern of shrinkage due to moisture loss during the curing phase.