AS/NZS 2891.14.3:1999

1 - AS/NZS 2891.14.3:1999 METHODS OF SAMPLING AND TESTING ASPHALT - FIELD DENSITY TEST-CALIBRATION OF NUCLEAR THIN-LAYER DENSITY....
1 - 1 SCOPE
1 - 2 REFERENCED DOCUMENTS
1 - 3 SAFETY PRECAUTIONS
2 - 4 APPARATUS
2 - 5 PROCEDURE
2 - 5.1 Preparation for calibration
2 - 5.2 Gauge function checks
2 - 5.3 Standard count check
3 - 5.4 Determination of density and depth factor calibration data
3 - 6 CALCULATIONS
3 - 6.1 Density data
3 - 6.2 Density calibration constants
4 - 6.3 Depth factor data
4 - 6.4 Depth factor calibration constants
5 - 6.5 Field density
5 - 6.6 Calculation of uncertainty of the calibration
6 - 7 GAUGE MICROPROCESSOR VALIDATION
6 - 8 RECALIBRATION
6 - 9 CALIBRATION REPORT
7 - APPENDIX A - DENSITY ADJUSTMENT USING MASS ATTENUATION COEFFICIENTS
7 - A1 GENERAL
7 - A2 PROCEDURE
9 - A3 TEST REPORT

This Standard sets out the methods for the following:(a) The calibration of the density systems of a nuclear thin-layer density gauge, using standard blocks. The density calibration equations, so derived, define the relationships between density count ratio and field density reading.(b) The calibration of the depth factor systems of a nuclear thin-layer density gauge, using standard blocks and plates. The depth factor calibration equations, so derived, define the relationships between the depth factors and the thickness of a surface (top) layer.NOTE: The gauge calculates the density of a surface layer of nominated thickness, using the densities measured at two different backscatter systems and the depth factors for the nominated thickness.An adjustment of the calibration equation is determined for each material tested from measurements of field density, as detailed in AS/NZS 2891.14.2.

First published as AS/NZS 2891.14.3:1999.