AS/NZS 2891.14.2:2013 PDF Download

AS/NZS 2891.14.2:2013 is a standard that provides a method for determining the field density of compacted asphalt using a nuclear thin-layer density gauge. The gauge utilizes two modes of operation or geometrics to simultaneously determine two values of gross mass per unit volume. These values, along with the depth calibration, are then used to estimate the density of the top layer of asphalt at the selected thickness.

The standard applies to asphalt layers ranging from 25 mm to 100 mm thick, with a nominal maximum size not exceeding 40 mm. The method does not provide operational details of the gauge but references the manufacturer's handbook for guidance.

As the quantity of material being assessed with nuclear gauges is not precisely known, the standard recommends referring to the manufacturer's handbook and current literature to determine the likely volume. Additionally, the use of nuclear gauges requires calibration in accordance with AS/NZS 2891.14.3 and regular checks on the operation and calibration of the gauge.

Appendix A of the standard provides guidance on conducting regular checks, and Appendix B outlines the determination of density offset for each material being tested.