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.
Claims14
A method comprising introducing carbon dioxide into a container comprising recycled concrete aggregates (RCA), wherein the RCA is a concrete where hydraulic cement in the concrete has already hydrated, and wherein the introduction of carbon dioxide is intermittent and the RCA is agitated during some or all of the introduction of carbon dioxide into the container.
A method comprising
- (i) performing one or more tests on RCA, wherein the RCA is a concrete where hydraulic cement in the concrete has already hydrated, to be treated with carbon dioxide, wherein the one or more tests comprise determining moisture content of the RCA;
- (ii) if necessary, based on the results of (i), altering the moisture content of the RCA;
- (iii) placing the RCA in a container;
- and
- (iv) introducing carbon dioxide into the container to carbonate the RCA, wherein the RCA is agitated during some or all of the introduction of carbon dioxide into the container.
Dependencies are inferred from the claim text.