Impact of Single and Multiple Specimen Suction Control Oedometer Testing on the Measurement of the Soil–Water Characteristic Curve

Devices that simultaneously facilitate controlling suction and applying a net stress on soil specimen provide soil–water characteristic curves (SWCCs) in terms of both the water content degree saturation, volumetric deformations at various applied suctions. Such tests determine specimens based measured volume changes However, studies have shown disagreements between volume–based calculated actual determined by oven-drying method. Testing multiple predetermined suctions measuring method can overcome this but are time-consuming approach. In study, impact testing single subsequently suction-water suction-degree saturation SWCCs for wetting process were studied. Statically compacted sandy clay used establishing using control oedometer. Differences noted an range 0 to 95 kPa. SWCC fitting parameters obtained from test results specimens. Statistical analysis suggested differences not significant. Corrections change measurements found minimize these differences.