A nuclear density test uses a nuclear density gauge to measure the in-place density and moisture content of compacted soil or asphalt without digging it up. A technician places the gauge on the lift, drives the source rod to the test depth, and reads wet density, dry density, and moisture in about a minute. Results are compared to the Proctor maximum to compute percent compaction, and each test is logged with its location, lift, elevation, and pass/fail result.
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