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Type: Wetting in a constant volume
Methods: µCT
Tags: hydraulic mechanical thermal
Description: The sample is placed into a cylindrical volume, where it is wetted axially from one end. The sample is heated to the specified temperature and its temperature and total volume remain constants throughout the experiment. Results include bentonite water content as a function of axial position and time. Additionally, the water content has been converted to degree of saturation by assuming a grain density of $\pu{2.78 g/cm^3}$.
Contact
Name: Janne Yliharju
Institute
Name: University of Jyväskylä
Abbreviation: JyU
Website: www.jyu.fi
Article
Reference: Yliharju, J. et al. Observation of water transport in compacted bentonite at elevated temperatures using X-ray tomography and Image Analysis
Status: In preparation
Bentonite
Name: Wyoming sodium bentonite
Supplier: Posiva Oy
Mineralogical composition
Montmorillonite: $\pu{88.2 wt-\%}$
Quartz: $\pu{3.5 wt-\%}$
Plagioclase: $\pu{2.9 wt-\%}$
K-feldspar: $\pu{2.4 wt-\%}$
Pyrite: $\pu{0.8 wt-\%}$
Rutile: $\pu{0.5 wt-\%}$
Cation exchange capacity: $\pu{0.81 eq/kg}$
Grain density: $\pu{2780 kg/m^3}$
Fluid
Name: Simulated groundwater
Composition
NaCl: $\pu{0.111 M}$
CaCl2: $\pu{0.032 M}$
Initial conditions
Bentonite dry density: $\pu{1.66 g/cm^3}$
Environment
Temperature: $\pu{50 \degree C}$
Geometry
Type: Cylinder
Diameter: $\pu{42 mm}$
Height: $\pu{21 mm}$
Boundaries
Top: stationary
Bottom: stationary
Lateral: stationary

Results

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