Table 3.

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).

TreatmentSubsidence gap below the concrete pavement in cm
Compacted control0.0 a
Sand-based structural soil0.1 a
Gravel-based structural soil0.4 a
Stratacell1.5 c
Silva cell0.6 b
Open control0.9 b