What should the gauge read when properly calibrated with a 3/16 shim?

When properly calibrated with a 3/16 shim, the gauge should read 3/16. This is because the purpose of the calibration process is to ensure that the gauge accurately reflects the thickness of the shim that is used during testing. In this case, using a 3/16 shim means that the gauge must be set to read that exact thickness to function correctly.

Having the gauge display the precise measurement of the shim ensures that any subsequent readings taken during paving operations will be reliable and reflect the actual material thickness being laid down. Accurate gauge readings are essential for achieving the desired pavement thickness and ensuring the quality of the asphalt installation, as deviations can affect the performance and longevity of the pavement.