Site investigation · Laboratory: rock & aggregates
Bulk density by wax coating calculator
Bulk and dry density of an irregular lump from waxed mass in air and in water.
Standard: AS 1289.5.2.1 (related) · ASTM D7263 Method A
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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 |
|---|---|---|
| Soil lump mass | 412.5 | g |
| Waxed mass in air | 436.8 | g |
| Waxed mass in water | 205.1 | g |
| Wax density | 0.9 | t/m³ |
| Moisture content | 18.2 | % |
Worked example — results
| Result | Value | Unit |
|---|---|---|
| Volume of waxed lump | 231.7 | cm³ |
| Wax volume | 27.00 | cm³ |
| Soil volume | 204.7 | cm³ |
| Bulk density | 2.02 | t/m³ |
| Dry density | 1.70 | t/m³ |
- ✓ Wax volume < 15% of total
Method, formulas and assumptions
- Volume of waxed lump = (436.8-205.1)/1 = 231.7 cm³
- Wax volume = (436.8-412.5)/0.9 = 27 cm³
- Soil volume = 231.7-27 = 204.7 cm³
- Bulk density = 412.5/204.7 = 2.0151 t/m³
- Dry density = 2.0151/(1+18.2/100) = 1.7049 t/m³
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.