From: Implementation of the full-scale emplacement (FE) experiment at the Mont Terri rock laboratory
Criterion | Requirements |
---|---|
Material | Natural (non-activated) sodium bentonite |
Smectite content by dried weight, measured by X-ray diffraction using a dried sample | >75% |
Additives (magnetite, baryte, binders, etc.) | No additives allowed |
CEC (Cation Exchange Capacity), measured by Cu(II)-triethylenetetramine method | >70 meq/100 g |
Pyrite content by dried weight, measured by X-ray diffraction using a dried sample | <1% |
Sulphur content by dried weight, measured by emission or mass spectroscopy | <0.5% (corresponds to ca. 1% of pyrite) |
Organic carbon by dried weight, measured by emission or mass spectroscopy | <1% |