Methods and compositions using calcium carbonate

Abstract

Provided herein are compositions and methods including hydraulic cement, supplementary cementitious material, and/or self-cementing material. Methods for making the compositions and using the compositions are provided.

1 - 73 . (canceled) 
     
     
         74 . A masonry unit comprising, a composition or a set and hardened form of the composition wherein the composition comprises a non-naturally occurring supplementary cementitious material (SCM) or a non-naturally occurring hydraulic cement, where the SCM or the hydraulic cement comprises at least 47% w/w vaterite, wherein the composition has a carbon isotopic fractionation value (δ 13 C) of less than −12‰. 
     
     
         75 . The masonry unit of  claim 74 , wherein the masonry unit is a tile. 
     
     
         76 . The masonry unit of  claim 75 , wherein the tile is a ceiling tile. 
     
     
         77 . The masonry unit of  claim 75 , wherein the tile has a flexural strength of between 0.5 to 7.5 MPa, compressive strength of between 5 to 75 MPa, or both. 
     
     
         78 . The masonry unit of  claim 74 , wherein the masonry unit is a block. 
     
     
         79 . The masonry unit of  claim 78 , wherein the block has a flexural strength of between 0.5 to 15 MPa, compressive strength of between 5 to 100 MPa, or both. 
     
     
         80 . The masonry unit of  claim 74 , wherein the masonry unit further comprises one or more additives selected from anti-desiccant, plasticizer, fibrous material, accelerator, set retarder, foaming agent, mildew resistance agent, fire resistance agent, polyvinyl alcohol, and combinations thereof. 
     
     
         81 . The masonry unit of  claim 74 , wherein the masonry unit further comprises recycled material selected from fly ash, slag, cement kiln dust, and combinations thereof. 
     
     
         82 . The masonry unit of  claim 74 , wherein the masonry unit further comprises at least one additional component selected from clay, shale, soft slate, calcium silicate, quarried stone, Portland cement, metakaolin, cement, aggregate, silica fume, and pozzolan. 
     
     
         83 . The masonry unit of  claim 74 , wherein the SCM or the hydraulic cement further comprises at least 1% w/w aragonite. 
     
     
         84 . A method for producing a masonry unit of  claim 74 , comprising:
 contacting an alkaline earth-metal containing water with a CO 2  source;   subjecting the alkaline earth-metal containing water to one or more conditions comprising temperature, pH, precipitation, ion ratio, concentrations of additives and ionic species, mixing rate, form of agitation, presence of seed crystal, catalyst, membrane or substrate, stabilizing additives, residence time of the precipitate, dewatering of the precipitate, washing the precipitate with water, drying, milling, storage, or combinations thereof to make a composition, wherein the composition comprises at least 47% w/w vaterite and wherein the composition has a δ 13 C value of less than −12‰,   combining the composition with an aqueous medium; and allowing the composition to set and harden into the masonry unit of  claim 74 .   
     
     
         85 . The method of  claim 84 , wherein the combining the composition with the aqueous medium transforms vaterite to aragonite. 
     
     
         86 . The method of  claim 84 , wherein the CO 2  source is an industrial waste stream comprising flue gas from combustion; a flue gas from a chemical processing plant; a flue gas from a plant that produces CO 2  as a byproduct; or combinations thereof. 
     
     
         87 . The method of  claim 84 , wherein the aqueous medium comprises water further comprising sodium chloride, calcium chloride, magnesium chloride, or combinations thereof. 
     
     
         88 . The method of  claim 84 , wherein the masonry unit is a tile. 
     
     
         89 . The method of  claim 88 , wherein the tile has a flexural strength of between 0.5 to 7.5 MPa, compressive strength of between 5 to 75 MPa, or both. 
     
     
         90 . The method of  claim 84 , wherein the masonry unit is a block. 
     
     
         91 . The method of  claim 90 , wherein the block has a flexural strength of between 0.5 to 15 MPa, compressive strength of between 5-100 MPa, or both. 
     
     
         92 . The method of  claim 84 , further comprising adding one or more additives to the composition, wherein the one or more additives are selected from the group consisting of anti-desiccant, plasticizer, fibrous material, accelerator, set retarder, foaming agent, mildew resistance agent, fire resistance agent, polyvinyl alcohol, and combinations thereof. 
     
     
         93 . The method of  claim 84 , wherein the composition further comprises at least 1% w/w aragonite.