Which of the following is considered to be the standard duration for a test using the nuclear density gauge?

The standard duration for a test using a nuclear density gauge is typically 1 minute. This time frame allows for the gauge to collect sufficient data to provide an accurate measurement of the moisture and density of the hot mix asphalt. A longer testing duration can decrease the variability of the readings and improve precision, which is crucial for ensuring compliance with specified mix designs and achieving optimal performance in pavement structures. This testing duration balances effectiveness in obtaining reliable data while keeping the testing process efficient on the job site.