Carbonation of concrete products
AssigneeCarboncure Technologies Inc.
InventorsSoley EINARSDOTTIR, Dean Paul FORGERON, Michael THOMAS, George Sean MONKMAN, Alex HANMORE
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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.
Claims54
A method for carbonating recycled concrete aggregate (RCA) comprising exposing the RCA to carbonated water.
The method of any one of the preceding claims wherein the RCA is contained in a watertight or substantially watertight vessel.
An system for carbonating recycled concrete aggregates comprising
- (i) a pile of unconfined RCA, wherein the RCA is present as particles in a desired size or range of sizes and comprises a top, a bottom, and an outer surface;
- (ii) a source or sources of water;
- (iii) one or more conduits operably connected to the source or sources of water and to one or more water distribution systems, wherein the one or more conduits further comprise a system for contacting the water with carbon dioxide as it moves through the conduit;
- (iv) a source of motive power, e.g., a pump, to move the water through the conduit from the source to the one or more water distribution systems, and out of the one or more water distribution systems onto at least part of the outer surface of the pile, so that the carbonated water percolates through the pile, emerging at the bottom of the pile.
A system for carbonating recycled concrete aggregates comprising
- (i) a vessel to contain RCA and carbonated water in which the RCA is immersed, wherein
- (a) the RCA is present as particles in a desired size or range of sizes;
- (b) the water has a top surface
- (c) the containment vessel is watertight or substantially watertight.
- (ii) a water collection pool separated from the RCA by a permeable layer and, optionally, an impermeable layer;
- (iii) one or more conduits operably connected to the water collection pool and to one or more water distribution systems, e.g., sprayers, situated to distribute water from the one or more water distribution systems, e.g. sprayers, to or near the top surface of the water;
- (iv) a source of motive power, e.g., a pump, to move the water through the conduit from the source to the one or more sprayers, and out of the one or more sprayers. The system of claim 34 comprising both a permeable layer and an impermeable layer.
The system of claim 35 wherein the permeable layer is situated below the impermeable layer.
A method comprising
- (i) placing unused wet concrete in a vessel;
- (ii) contacting the unused wet concrete with carbon dioxide while the unused wet concrete is mixing to carbonate the used wet concrete, producing carbonated unused wet concrete;
- and
- (iii) removing the carbonated unused wet concrete from the vessel.
A system for carbonating unused wet concrete comprising
- (i) a vessel to hold and mix the unused wet concrete;
- (ii) an apparatus to introduce a source of carbon dioxide to the unused wet concrete, thereby producing carbonated unused wet concrete.
Dependencies are inferred from the claim text.