Site investigation · Laboratory: compaction & field density
Nuclear gauge density lot assessment calculator
Lot of nuclear gauge tests: dry density, relative compaction, characteristic value (mean − k·s) and moisture ratio.
Standard: AS 1289.5.8.1 · AS 1289.5.4.1 · AS 3798 lot testing
Open the live calculator → All site investigation calculators
Inputs in the worked example
The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.
| Input | Value | Unit |
|---|---|---|
| Tests: id, wet density (t/m³), moisture (%) | 1, 2.18, 9.8 2, 2.21, 10.4 3, 2.15, 9.1 4, 2.20, 10.0 5, 2.17, 9.6 | |
| Lab MDD | 2.04 | t/m³ |
| Lab OMC | 9.5 | % |
| Acceptance constant k | 0.92 | |
| Specified characteristic RC | 98 | % |
Worked example — results
| Result | Value | Unit |
|---|---|---|
| Mean RC | 97.43 | % |
| Std deviation of RC | 0.651 | % |
| Characteristic RC = mean − k·s | 96.83 | % |
| Lowest individual RC | 96.60 | % |
- ✗ Characteristic RC ≥ specified
- ✓ At least 3 tests in lot
Method, formulas and assumptions
- Mean RC = AVERAGE([t.rc]) = 97.43 %
- Std deviation of RC = STDEV([t.rc]) = 0.65123 %
- Characteristic RC = mean − k·s = 97.43-0.92*0.65123 = 96.831 %
- Lowest individual RC = MIN([t.rc]) = 96.601 %
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.