Compositions comprising a mechanochemically carboxylated mineral filler and a cement and/or asphalt binder
AssigneeCarbon Upcycling Technologies Inc.
InventorApoorv SINHA
Life of this patent
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Abstract
The present disclosure relates to compositions comprising a mechanochemically carboxylated mineral filler and a binder, in which the binder is cement and/or asphalt and the filler is obtained by mechanochemically carboxylating a silicate mineral. The disclosure further relates to methods for preparing the compositions and for preparing concrete from these compositions and to the concrete obtained from the method. Uses of the mechanochemically carboxylated mineral filler, for example as a filler in asphalt or cement, are described.
Claims21
1-15. (canceled)
A composition comprising a mechanochemically carboxylated mineral filler and a binder;
- wherein the binder is selected from the group consisting of cement, asphalt, and combinations thereof, and wherein the mechanochemically carboxylated mineral filler is obtained by a method comprising the following steps:
- a) providing a solid feedstock comprising a silicate mineral, wherein the solid feedstock is a particulate material which has a BET surface area of more than 0.01 m2/g and a D50 within the range of 0.1-5000 μm;
- b) providing an oxidizing gas comprising CO2;
- c) introducing said solid feedstock and said oxidizing gas into a mechanical agitation unit;
- and
- d) subjecting the material of said solid feedstock to a mechanical agitation operation in the presence of said oxidizing gas at an oxidizing gas pressure of more than 1 atm to obtain the mechanochemically carboxylated mineral filler;
- wherein step (d) comprises grinding or milling;
- and
- wherein the mechanochemically carboxylated mineral filler has a D90 within a range of 20-100 μm and/or a D50 within a range of 0.5-50 μm.
Dependencies are inferred from the claim text.