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Testing

• Suction pressure of sampled specimen (measured in kPa)
• Moisture content
• Plots of moisture content and suction against depth, and assumed equilibrium profiles for different lateral pressures

• Specify whether specimens are to be undisturbed (recommended) or remoulded (see note below).
• If remoulded, the remoulding density/criteria.
• Depth at which water encountered (if any).

• Determining depth and profile of influence on soil suction of trees, change in groundwater levels etc.

• Undisturbed core/liner sample at least 100mm in length.
• The larger diameter (eg 100mm compared with 38mm) will typically have less disturbance and give a more accurate result.

Note:
Remoulded samples are not recommended, but they may give an indication of the suction profile with depth. An undisturbed specimen will give a more accurate value of the suction.