How often should a nuclear density gauge be calibrated?

A nuclear density gauge should be calibrated before each use to ensure accuracy and reliability in measuring the moisture and density of asphalt and other materials. This frequent calibration is necessary due to the potential for environmental factors, wear on the instrument, or changes in the operating conditions that could affect the gauge's performance and measurements. By calibrating the gauge each time it is used, you can validate that the readings are precise, thereby maintaining quality control in paving operations.

In practice, this high standard of calibration minimizes inaccuracies that might otherwise arise over time or with varying site conditions. Regular calibration can effectively mitigate the risk of errors during construction activities, which could lead to subpar material compaction, ultimately affecting the quality and longevity of the pavement.