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NACOE- Best Practice in Non-Destructive Testing of Assurance of Asphalt

ARRB Project prepared for QLD TMR


APRB would like to acknowledge the assistance from AfPA and their members who provided field data.

  • a procedure to remove uncharacteristic values from the dataset used to calculate the density bias
  • limitations on the pavement temperature while carrying out PQI testing
  • possible replacement of the cloverleaf pattern with repeated testing at a single position, pending outcomes from further studies.

It is also recommended that a controlled study be undertaken to assess the proposed updates to test method Q326 and the relative performance of the PQI device against the NDG.

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