Patent ID: 8006446

Claim:
A formed building material comprising a CO 2 -sequestering component, wherein the CO 2 -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 CO 2 -sequestering has a δ 13 C 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.