Nuclear gauge testing manual
The Nuclear Gauge Testing Manual (NGTM) is published to assist Main Roads in the building and maintenance of the state road network. The manual provides procedures and instructions for the safe use and operation of nuclear gauges to measure the compacted density of soils, crushed rocks and asphalt materials.
In addition to containing procedures for the testing of soils and asphalt, the NGTM details how to determine material biases (moisture content and wet density) for Troxler, Humboldt and Campbell-Pacific Nuclear (CPN) Gauges.
Feedback is encouraged and should be emailed or faxed as per the contact details in the manual cover sheet.
The manual was available from October 2003. Amendment 2 was published on this site in November 2007. If you have downloaded the original manual, you can update that version using Amendment 2.
Amendment 2 (PDF, 592 KB)
If you want the full manual, you can download it below.
Nuclear Gauge Testing Manual including amendment 2 (PDF, 1.23 MB)
If you are not sure if your copy is current, you can check the table of contents which are available separately to avoid opening the full manual.
Table of contents (PDF, 47 KB)
The manual has been divided into three sections; Introduction and Calibration, Test Methods and Operating Instructions, for those users wishing to view those parts of the manual.
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Introduction and calibration (PDF, 816 KB)
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Test methods (PDF, 305 KB)
- Operating instructions
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Operational checks (PDF, 216 KB)
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Testing soils (PDF, 292 KB)
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Testing asphalt (PDF, 277 KB)
Last updated: 01 June 2009
