Why is it critical to know the moisture content of aggregates?

Knowing the moisture content of aggregates is critical for adjusting mixture design because the moisture level directly affects the water-cement ratio in concrete mixes. When aggregates contain water, it impacts the total amount of water needed in the mixture; if not accounted for, it could lead to either an overly wet mix or insufficient hydration of the cement. Proper adjustment ensures that the desired strength and durability of the concrete are achieved. Maintaining the correct balance of water is essential for the curing process and overall integrity of the concrete, making it vital for those preparing the mixture to accurately assess and incorporate the moisture content of the aggregates into their calculations.