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 $\pu{2.78 g/cm^3}$.
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: $\pu{2.78 kg/m^3}$
Fluid
Name: Simulated groundwater
Composition
NaCl: $\pu{0.111 M}$
CaCl2: $\pu{0.032 M}$
Initial conditions
Bentonite dry density: $\pu{1.65 g/cm^3}$
Environment
Temperature: $\pu{50 \degree C}$
Geometry
Type: Swelling in a cylinder of constant total volume