In which way does moisture content contribute to the weight of aggregates?

Moisture content plays a significant role in determining the weight of aggregates. When the moisture content increases, water is added to the surface and into the pores of the aggregates. This additional water contributes to the overall weight of the aggregates because it physically adds mass to the material.

In the context of concrete mixing and batching processes, understanding how moisture affects aggregate weight is crucial. Wet aggregates will weigh more than dry aggregates, and this difference can impact the accuracy of material measurements when scaling up concrete production. Accurate measurements are essential for achieving the proper water-cement ratio, which directly influences the strength and durability of the finished concrete.

Thus, the observation that higher moisture increases the weight of aggregates reflects the fundamental principle that water adds to the overall mass of the aggregate material, making option C the correct response.