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Type: Wetting in a constant volume
Methods: µCT
Tags: hydraulic mechanical
Description: The sample is placed into a cylindrical volume, where it is wetted axially from one end using pressurised water. The total volume of the sample remains constant throughout the experiment. Results include bentonite water content as a function of axial position and time. Additionally, the water content has been converted to the degree of saturation by assuming a grain density of $\pu{2.813 g/cm^3}$. Approximately $\pu{1.2 mm}$ layers from both ends of the sample are rejected due to the uncertainties in the displacement measurements.
Contact
Name: Janne Yliharju
Institute
Name: University of Jyväskylä
Abbreviation: JyU
Website: www.jyu.fi
Bentonite
Name: Georgian Na/Ca
Mineralogical composition
Smectite: $\pu{83 wt-\%}$
Mica: $\pu{4 wt-\%}$
Quartz: $\pu{<1 wt-\%}$
Feldspar: $\pu{6 wt-\%}$
Zeolite: $\pu{5 wt-\%}$
Carbonate: $\pu{1 wt-\%}$
Cation exchange capacity: $\pu{0.88 eq/kg}$
Grain density: $\pu{2813 kg/m^3}$
Fluid
Name: Simulated groundwater
Composition
NaCl: $\pu{0.111 M}$
CaCl2: $\pu{0.032 M}$
Initial conditions
Bentonite dry density: $\pu{1.46 g/cm^3}$
Environment
Pressure: $\pu{4 MPa}$
Geometry
Type: Cylinder
Diameter: $\pu{42 mm}$
Height: $\pu{21 mm}$
Boundaries
Top: stationary
Bottom: stationary
Lateral: stationary

Results

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