Sets out the method for the calibration of a nuclear surface moisture-density gauge using standard blocks, and the checking of density calibrations.

NZS 4407.4.2.4:1991
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Methods of testing road aggregates – Field tests – The field water content and field dry density of compacted aggregate – Test 4.2.4 Calibration of nuclear surface moisture-density gauge using standard blocks
Standards New Zealand , 05/31/1991