Porosity of non-compacted loam used to create the blends = 57.1 %. Comparative porosities of stone/soil mixes if compacted to standard Proctor optimum density. Porosity of interstitial soil also shown, from dividing volume of voids by the volume of soil solids. The stone is treated as inert space and is ignored in the calculation.
| Stone | Stone to soil ratio | Porosity blend at standard Proctor optimum density (%) | %soil solids in compactec profile by volume | Porosity soil within the stone matrix (%) |
|---|---|---|---|---|
| Limestone | ||||
| 3.68:1 | 25.5 | 19.3 | 56.9 | |
| 4.09:1 | 26 | 17.7 | 59.5 | |
| 4.6:1 | 26.4 | 16 | 62.3 | |
| 5.26:1 | 27 | 14.3 | 65.5 | |
| High friction | ||||
| 5.47:1 | 21.9 | 14.4 | 60.4 | |
| 6.03:1 | 23.1 | 13.1 | 63.8 | |
| 6.84:1 | 24.4 | 11.6 | 67.7 | |
| 7.81:1 | 25.6 | 10.3 | 71.4 | |