Means for the conditioning of radioactive or toxic waste in cement and its production process
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United States of America Patent
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Mar 6, 1990
Grant Date -
N/A
app pub date -
Nov 22, 1988
filing date -
Dec 2, 1987
priority date (Note) -
Expired
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Abstract
A process for conditioning radioactive or toxic waste which can contain boron in a cement-based matrix comprises mixing the waste in a drum in the presence of water with non-aluminous cement, aluminous cement and optionally a siliceous compound and/or a boron-containing compound, in order to form a cement matrix containing stable phases of the straetlingite, calcium monoboroaluminate and borated ettringite type and, if desired, placing around the drum a mortar layer, which can be prepared from cement, deflocculated fumed silica, siliceous sand, smectic clay and water.
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