Which device is commonly used to verify field density?

Which device is commonly used to verify field density?

• A. Nuclear gauge testing or sand cone.
• B. Tape measure
• C. Stopwatch
• D. Infrared thermometer

Answer: (A)

Field density verification aims to confirm how compacted the soil is in the field. The most common devices used are nuclear gauge testing or the sand cone method. A nuclear gauge quickly measures in-place density (and moisture content) from the surface using gamma rays, giving rapid results on site. The sand cone method uses a calibrated cone filled with dry sand; the sand volume required to fill a pre-made hole provides the density. The other tools listed—tape measure, stopwatch, infrared thermometer—don’t measure density directly, so they aren’t used for this purpose.

Field density verification aims to confirm how compacted the soil is in the field. The most common devices used are nuclear gauge testing or the sand cone method. A nuclear gauge quickly measures in-place density (and moisture content) from the surface using gamma rays, giving rapid results on site. The sand cone method uses a calibrated cone filled with dry sand; the sand volume required to fill a pre-made hole provides the density. The other tools listed—tape measure, stopwatch, infrared thermometer—don’t measure density directly, so they aren’t used for this purpose.