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US 8,137,455 B1Granted
Methods and compositions using calcium carbonate
AssigneeCalera Corporation
InventorsBrent R. Constantz, Kasra Farsad, Chris Camire, Joshua Patterson, Matthew Ginder-Vogel, Karin Yaccato, John Stagnaro, Martin Devenney, Justin Ries
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.
Claims15
A method for making a composition, comprising:
- (a) contacting a solution comprising a proton removing agent with a CO2 gaseous stream to produce a CO2 charged solution;
- (b) contacting the CO2 charged solution with an alkaline earth-metal containing water;
- and
- (c) subjecting the alkaline earth-metal containing water of step (b) to one or more conditions to make a self-cementing composition wherein the self-cementing composition comprises at least 1% w/w vaterite having a carbon isotopic fractionation value (δ13C) of between −12‰ to −25‰, wherein the composition is in saltwater, and wherein the composition upon setting and hardening has a compressive strength of at least 14 MPa.
1 more element
Dependencies are inferred from the claim text.