Measured moisture percentage for aggregates refers to which data item?

• A. Air Content Measurement
• B. Chloride Test Results
• C. Moisture Content
• D. Water Addition at Jobsite

Answer: (C)

Measured moisture percentage for aggregates is the moisture content of the aggregates. It tells you how much free water is already present in the aggregate at batching, expressed as a percent of the aggregate’s dry weight. This value is used to adjust the batch water so the final water–cement ratio matches the design: if the aggregates are wetter than assumed, you reduce water; if they’re drier, you may need to add more water. This is distinct from air content measurements (which relate to air voids in fresh concrete), chloride test results (which relate to potential corrosion), or the water added at the jobsite (which is the actual water put into the mix and must be reconciled with the aggregate moisture content).