Binder and the use thereof for conditioning waste containing aluminium metal
AssigneeCommissariat A L'energie Atomique Aux Energies Alternatives
InventorsCeline Cau Dit Coumes, David Lambertin, Pascal Antonucci, Maryline Charlot
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Abstract
The present invention relates to a binder composition comprising (i) a phospho-magnesium cement; (ii) a boron source; (iii) a lithium salt; and (iv) water and to its preparation method. The present invention also relates to the use of such a binder for confining wastes and notably nuclear wastes containing aluminum metal.
Claims21
A binder composition comprising:
- (i) a phospho-magnesium cement;
- (ii) a boron source;
- (iii) a lithium salt;
- and
- (iv) water.
A binder composition, comprising:
- (i) a phospho-magnesium cement;
- (ii) a boron source;
- (iii) a lithium salt;
- and
- (iv) water, wherein said binder composition is selected from among
- a grout composition formed with
- (i) a phospho-magnesium cement formed with magnesium oxide calcined between 1,000 and 1,500° C., with a specific surface area of less than 1 m2/g and with potassium dihydrogenphosphate;
- (ii) boric acid;
- (iii) lithium nitrate;
- (iv) a filler consisting of alumino-siliceous fly ash;
- and
- (v) water;
- a mortar composition formed with
- (i) a phospho-magnesium cement formed with magnesium oxide calcined between 1,000 and 1,500° C., with a specific surface area of less than 1 m2/g and with potassium dihydrogenphosphate;
- (ii) boric acid;
- (iii) lithium nitrate;
- (iv) a filler consisting of alumino-siliceous fly ash;
- (v) water;
- and
- (vi) siliceous sand with a grain size of less than 2 mm;
- and
- a concrete composition formed with:
- (i) a phospho-magnesium cement formed with magnesium oxide calcined between 1,000 and 1,500° C., with a specific surface area of less than 1 m2/g and with potassium dihydrogenphosphate;
- (ii) boric acid;
- (iii) lithium nitrate;
- (iv) a filler consisting of alumino-siliceous fly ash;
- (v) water;
- (vi) siliceous sand with a grain size of less than 2 mm;
- and
- (vii) a siliceous granulate.
A method for preparing a binder composition, comprising the steps of:
- a) preparing a mixture comprising water, a boron source, a lithium salt, phosphorus-magnesium cement, and a filler;
- and
- b) kneading the obtained mixture subsequently to said step (a).
Packages of wastes confined in a binder with a composition comprising water, a boron source, a lithium salt, and phosphorus-magnesium cement, and conditioned in barrels or caissons.
Dependencies are inferred from the claim text.