REDUCED-CARBON FOOTPRINT COMPOSITIONS AND METHODS
Reduced-carbon footprint compositions, and methods for making and using the same, are provided. Aspects of the reduced-carbon footprint compositions include producing carbonate compositions from CO 2 , which compositions may replace conventional hydraulic cement and/or aggregate components of the compositions. The reduced-carbon footprint compositions find use in a variety of applications, including use in a variety of building materials and building applications.
1 - 49 . (canceled)
50 . A concrete composition, comprising:
synthetic carbonate comprising vaterite wherein the synthetic carbonate is at least 10 wt % and at least one component selected from the group consisting of at least 15 wt % cement, at least 5 wt % supplementary cementitious material, and combination thereof.
51 . A concrete composition, comprising: synthetic carbonate comprising vaterite wherein the synthetic carbonate is at least 10 wt % and at least 10 wt % aggregate,
52 . The concrete composition of claim 50 , wherein the synthetic carbonate comprises at least 30 w % vaterite.
53 . The concrete composition of claim 50 , wherein the cement is ordinary portland cement.
54 . The concrete composition of claim 50 , wherein the cement is between 15-90 wt %.
55 . The concrete composition of claim 50 , wherein the supplementary cementitious material is selected from the group consisting of fly ash, metakaolin, slag, and combination thereof.
56 . The concrete composition of claim 50 , wherein the supplementary cementitious material is between 5-70 wt %.
57 . A concrete composition, comprising between 5-30 wt % of the total concrete composition of claim 50 , 10-90 wt % aggregate, and remaining % of water.
58 . The concrete composition of claim 57 , wherein the aggregate is selected from the group consisting of fine aggregate, coarse aggregate, and combination thereof.
59 . The concrete composition of claim 58 , wherein the fine aggregate is sand and the coarse aggregate is rock.
60 . The concrete composition of claim 50 , wherein the composition after combination with water, sets and hardens with compressive strength of at least 14 MPa after 7 days.
61 . The concrete composition of claim 50 , wherein the synthetic carbonate composition has a mean particle size of less than 100 micron.
62 . A method to form a concrete composition, comprising:
a) producing a synthetic carbonate composition comprising vaterite by processing a waste gas stream comprising carbon dioxide with a solution comprising proton removing agent, and a divalent cation containing solution; and
b) mixing at least 10 w % of the synthetic carbonate composition with at least one component selected from the group consisting of at least 15 wt % cement, at least 5 wt % supplementary cementitious material, and combination thereof, to form a concrete composition.
63 . The method of claim 62 , further comprising adding water to the concrete composition to set and harden the concrete composition wherein the concrete composition after setting and hardening comprises aragonite.
64 . The method of claim 62 , wherein the method further comprises adding at least 10 wt % aggregate to between 5-30 wt % of the concrete composition.
65 . The method of claim 62 , wherein the aggregate is selected from the group consisting of fine aggregate, coarse aggregate, and combination thereof.
66 . The method of claim 62 , wherein the synthetic carbonate composition has a mean particle size of less than 100 micron.
67 . The method of claim 62 , wherein the cement component is ordinary Portland cement.
68 . The method of claim 62 , wherein the supplementary cementitious material is selected from the group consisting of fly ash, metakaolin, slag, and combination thereof.
69 . The method of claim 62 , wherein the synthetic carbonate composition is between 10-90 w %, the cement is between 15-90 wt %, and the supplementary cementitious material is between 5-70 wt %.