Carbonation of concrete aggregates
AssigneeCarboncure Technologies Inc.
InventorsMichael Thomas, George Sean Monkman, Alex Hanmore, Dean Paul Forgeron
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Abstract
Provided herein are methods and compositions for carbonation of recycled concrete aggregates (RCA) to produce carbonated RCA. In addition, uses of the carbonated RCA, such as in building materials, and building materials containing RCA, are included. Carbonation of RCA may be used alone or may be used in combination with other carbonation processes associated with concrete manufacture, such as carbonation of wet concrete mixes and/or carbonation of concrete wash water.
Claims26
A method for carbonating recycled concrete aggregate (RCA) comprising
- (i) introducing carbon dioxide to a container comprising RCA, wherein carbon dioxide is introduced during grading/classification of crushed RCA;
- (ii) determining a value for one or more characteristics of the RCA, the container, or gas within the container;
- and
- (iii) based at least in part on the value determined in step (ii), modulating the introduction of carbon dioxide into the container,
- whereby the RCA is carbonated to produce carbonated RCA.
A method for carbonating recycled concrete aggregate (RCA) comprising
- (i) introducing carbon dioxide to a container comprising RCA, wherein the carbon dioxide is a mixture of gaseous and solid carbon dioxide;
- (ii) determining a value for one or more characteristics of the RCA, the container, or gas within the container;
- and
- (iii) based at least in part on the value determined in step (ii), modulating the introduction of carbon dioxide into the container, whereby the RCA is carbonated to produce carbonated RCA.
Dependencies are inferred from the claim text.