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US 8,932,400 B2Granted
Methods and compositions using calcium carbonate
AssigneeCalera Corporation
InventorsIrvin Chen, Miguel Fernandez, Joshua Patterson, Martin Devenney
Life of this patent
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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.
Claims13
A method for making a construction panel, comprising:
- contacting an alkaline earth-metal containing water with a CO2 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 10% w/w vaterite and at least 1% w/w aragonite, wherein the composition has a carbon isotopic fractionation value (δ13C) of less than −12‰,
- combining the composition with an aqueous medium;
- and
- allowing the composition to set and harden into a construction panel.
2 more elements
Dependencies are inferred from the claim text.