CO2-sequestering formed building materials
AssigneeCalera Corporation
InventorsBrent R. Constantz, Andrew Youngs, Terence C. Holland
Life of this patent
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Abstract
CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.
Claims9
A formed building material comprising a CO2-sequestering component, wherein the CO2-sequestering component comprises 75% (w/w) or more calcium carbonate comprising a metastable carbonate selected form the group consisting of amorphous calcium carbonate, vaterite, aragonite, and combinations thereof,
- wherein the CO2-sequestering has a δ13C less than −15%, and
- wherein the formed building material is selected from the group consisting of
- a) a brick having a compressive strength ranging from 5 to 100 MPa;
- b) a block having a compressive strength ranging from 5 to 100 MPa;
- c) a tile having a compressive strength ranging from 5 to 75 MPa;
- d) a cement board having a compressive strength ranging from 5 to 50 MPa;
- e) a drywall having a compressive strength ranging from 1 to 20 MPa;
- f) a conduit having a compressive strength ranging from 5 to 75 MPa;
- g) a beams having a compressive strength ranging from 35 to 150 MPa;
- h) a basin having a compressive strength ranging from 5 to 60 MPa;
- i) a column having a compressive strength ranging from 25 to 200 MPa;
- j) a fiber-cement siding having a compressive strength ranging from 2 to 25 MPa;
- and
- k) a slab having a compressive strength ranging from 10 to 100 MPa.
A formed building material produced by a method comprising:
- a) producing a CO2-sequestering component comprising a metastable carbonate selected from the group consisting of amorphous calcium carbonate, aragonite, vaterite, and combinations thereof from a saltwater solution of divalent cations and a gaseous waste stream comprising CO2,
- wherein the CO2-sequestering component has a δ13C less than −15%;
- and
- b) forming the formed building material from the CO2-sequestering component in a process comprising contacting the CO2-sequestering component with freshwater, wherein the formed building material comprises 75% (w/w) or more of the CO2-sequestering component, and wherein the formed building material is selected from the group consisting of
- a) a brick having a compressive strength ranging from 5 to 100 MPa;
- b) a block having a compressive strength ranging from 5 to 100 MPa;
- c) a tile having a compressive strength ranging from 5 to 75 MPa;
- d) a cement board having a compressive strength ranging from 5 to 50 MPa;
- e) a drywall having a compressive strength ranging from 1 to 20 MPa;
- f) a conduit having a compressive strength ranging from 5 to 75 MPa;
- g) a beams having a compressive strength ranging from 35 to 150 MPa;
- h) a basin having a compressive strength ranging from 5 to 60 MPa;
- i) a column having a compressive strength ranging from 25 to 200 MPa;
- j) a fiber-cement siding having a compressive strength ranging from 2 to 25 MPa;
- and
- k) a slab having a compressive strength ranging from 10 to 100 MPa.
Dependencies are inferred from the claim text.