Method for treating polluted soil by a hydraulic binder with mayenite phase
A method for treating polluted soils, includes mixing the soil with a hydraulic binder, wherein the hydraulic binder includes: as the only high-alumina clinker, a high-alumina clinker including more than 80 wt % of mayenite C12A7 phase or a mayenite isotope, the high-alumina clinker making up at least 70 wt % of the weight of the hydraulic binder; and 1 wt % to 30 wt %, relative to the total weight of the binder, of lime.
1. A method for treating polluted soils, comprising mixing said soil with a hydraulic binder, wherein the hydraulic binder comprises:
as the sole aluminous clinker, an aluminous clinker comprising more than 80% by mass of mayenite C12A7 phase or a mayenite isotype, said aluminous clinker represents at least 70% by weight of the weight of the hydraulic binder;
from 1 to 30% by weight, relative to the total weight of the binder, of lime.
2. The method according to claim 1 , wherein the aluminous clinker comprises as the sole aluminate phase the mayenite C12A7 phase.
3. The method according to claim 1 , wherein the lime is free lime, slaked lime, or a mixture of free lime and slaked lime.
4. The method according to claim 1 , wherein the hydraulic binder comprises from 5 to 25% by weight, relative to the total weight of the binder, of quicklime or slaked lime.
5. The method according to claim 1 , comprising mixing said soil with said hydraulic binder in soil/binder mass proportions comprised between 1 and 10 parts binder per 100 parts soil.
6. A method to stabilize soils in situ or before storage, comprising mixing said soil with a hydraulic binder, wherein the hydraulic binder comprises:
as the sole aluminous clinker, an aluminous clinker comprising more than 80% by mass of mayenite C12A7 phase or a mayenite isotype, said aluminous clinker represents at least 70% by weight of the weight of the hydraulic binder;
from 1 to 30% by weight, relative to the total weight of the binder, of lime.
7. The method according to claim 1 , wherein said polluted soils are polluted by anions and/or heavy metals.
8. The method according to claim 7 , wherein said anions are sulfate ions.
9. The method according to claim 3 , wherein the lime is slaked lime.
10. The method according to claim 6 , wherein said soils are polluted by anions and/or heavy metals.
11. The method according to claim 6 , wherein the aluminous clinker comprises as the sole aluminate phase the mayenite C12A7 phase.
12. The method according to claim 6 , wherein the hydraulic binder comprises from 5 to 25% by weight, relative to the total weight of the binder, of quicklime or slaked lime.
13. The method according to claim 6 , comprising mixing said soil with said hydraulic binder in soil/binder mass proportions comprised between 1 and 10 parts binder per 100 parts soil.