Experience with the use and operation of nuclear moisture / density meters

In January 1973 the Main Roads Department of Western Australia purchased its first nuclear moisture / density meter. Procedures relating to radiological safety were instituted at the time of purchase of the first meter. By November 1979 the number of meters in use had increased to thirteen and an estimated 60,000 moisture / density measurements had been carried out during this period. Consistency of calibration is essential for the successful use of nuclear meters and it is demonstrated that this can be achieved with standard density and moisture blocks. In the direct transmission mode the meters measure the average density of the soil horizon and the selection of this mode for operational use is recommended. In combination with direct transmission the backscatter mode may be used to assess vertical density gradients. The meters were found to be a significant improvement in comparison with the time consuming and at times difficult sand replacement tests but thorough training of operators, the application of recommended test methods and critical examination of data are still necessary if meaningful results are to be obtained. It is advised that the users of nuclear meters carry adequate stock of spare parts and that they can service and repair their instruments.


  • English

Media Info

  • Pagination: 164-75
  • Monograph Title: Aggregate durability tests compared
  • Serial:
    • Volume: 10
    • Issue Number: 3

Subject/Index Terms

Filing Info

  • Accession Number: 01439173
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:03PM