What might be a consequence of using too much water in a concrete mix?

Using too much water in a concrete mix can lead to decreased durability. When excess water is added, it increases the water-cement ratio, which can result in a weaker concrete structure after it cures. This is primarily because the additional water creates more voids within the concrete matrix once it evaporates during the curing process. These voids compromise the overall integrity of the concrete, making it more susceptible to factors such as freeze-thaw cycles, chemical attacks, and other forms of degradation over time.

Moreover, a high water content can lead to segregation of the concrete mix, which affects the uniformity of the hardening process and can further weaken structural strength. While increased workability might seem like a short-term benefit, the long-term consequences of diminished durability can severely affect the lifespan and performance of the concrete structure. Thus, maintaining the correct water-to-cement ratio is crucial for achieving optimal concrete performance.