What happens to concrete if proper curing conditions are not maintained?

Maintaining proper curing conditions for concrete is critical for ensuring its strength and durability. When concrete is not cured adequately, it can develop weak areas within the matrix due to uneven hydration of the cement particles. This insufficient hydration results in incomplete chemical reactions that are essential for the concrete to achieve its intended strength. Additionally, as the concrete dries out too quickly, it can lead to surface cracks, also known as shrinkage cracks. These cracks compromise the structural integrity and performance of the concrete, making it less capable of supporting loads and more susceptible to environmental damage in the long run. Thus, the correct answer identifies the significant risk of developing weak areas and cracks when proper curing conditions are not maintained.