Mean soil subsidence, measured from the bottom of the concrete to the top of the soil in cm. Means followed by the same letter do not differ significantly (SNK P = 0.05).
| Treatment | Subsidence gap below the concrete pavement in cm |
|---|---|
| Compacted control | 0.0 a |
| Sand-based structural soil | 0.1 a |
| Gravel-based structural soil | 0.4 a |
| Stratacell | 1.5 c |
| Silva cell | 0.6 b |
| Open control | 0.9 b |