Granted Patent B2

US 12,508,738 · App. 18/227,875 · Granted Dec 30, 2025

Inventors: George Sean Monkman (Halifax, CA); Paul J. Sandberg (Venice, FL); Kevin Cail (Sarasota, FL); Dean Paul Forgeron (Hacketts Cove, CA); Mark Macdonald (Sackville, CA)

Assignee: CARBONCURE TECHNOLOGIES INC.

B28C5/003B01F25/53B28C7/12C02F1/66C04B22/0046C04B28/04B28C7/0418B28C7/0454C02F2209/005C02F2209/02C02F2209/05C02F2209/06C02F2209/245C02F2209/42C02F2209/44C04B40/0032

Abstract

Claims (37)

1 . An apparatus for contacting concrete wash water with carbon dioxide comprising

(i) a container containing concrete wash water, wherein the concrete wash water contains solids;

(ii) a system configured to agitate the concrete wash water in the container sufficiently to prevent solids from settling; and

(iii) a system configured to contact the concrete wash water with carbon dioxide, wherein the system comprises

(a) a source of carbon dioxide;

(b) a first conduit operably connected to the carbon dioxide source to transport carbon dioxide to a location where the concrete wash water is contacted with carbon dioxide, and

(c) an actuator in the first conduit or otherwise located to modulate the flow of carbon dioxide to be contacted with the concrete wash water; and

(iv) a control system that receives input regarding conditions of the system, processes the input, and signals the actuator to modify the carbon dioxide flow in the first conduit based on the processing, wherein the conditions comprise at least two of

(a) a flow rate of carbon dioxide in the first conduit,

(b) concrete wash water pH,

(c) concrete wash water temperature,

(d) a calculated amount of carbon dioxide to be added to the concrete wash water, or

(e) specific gravity of the concrete wash water.

2 . The apparatus of claim 1 wherein the conditions comprise at least three of

(a) a flow rate of carbon dioxide in the first conduit,

(b) concrete wash water pH,

(c) concrete wash water temperature,

(d) a calculated amount of carbon dioxide to be added to the concrete wash water, or

(e) specific gravity of the concrete wash water.

3 . The apparatus of claim 1 wherein the conditions comprise at least four of

(a) a flow rate of carbon dioxide in the first conduit,

(b) concrete wash water pH,

(c) concrete wash water temperature,

(d) a calculated amount of carbon dioxide to be added to the concrete wash water, or

(e) specific gravity of the concrete wash water.

4 . The apparatus of claim 1 comprising a recirculation loop and a pump to pump the concrete wash water from the container containing concrete wash water into the recirculation loop and back to the container containing concrete wash water, wherein the location where the concrete wash water is contacted with the carbon dioxide is in the recirculation loop.

5 . The apparatus of claim 4 wherein the control system further receives input regarding information from the pump.

6 . The apparatus of claim 4 wherein the system configured to agitate the concrete wash water comprises the pump to pump the concrete wash water into the recirculation loop.

7 . The apparatus of claim 4 further comprising a second conduit operably connected to the container to transport concrete wash water to the container.

8 . The apparatus of claim 1 wherein the calculated amount of carbon dioxide to be added to the concrete wash water is based on a known or estimated carbon dioxide uptake required to reach an acceptable endpoint.

9 . The apparatus of claim 8 wherein the acceptable endpoint comprises acceptable concrete wash water pH, acceptable concrete wash water carbon dioxide uptake, or a combination thereof.

10 . The apparatus of claim 9 wherein the acceptable endpoint comprises acceptable concrete wash water pH.

11 . The apparatus of claim 9 wherein the acceptable endpoint comprises acceptable concrete wash water carbon dioxide uptake.

12 . The apparatus of claim 1 further comprising a system to transport concrete wash water contacted with carbon dioxide to a concrete mixer.

13 . A kit for retrofitting a concrete wash water operation to carbonate the concrete wash water, wherein the kit comprises some or all of the components of claim 1 .

14 . The kit of claim 13 comprising components (ii)-(iv) of claim 1 .

15 . The kit of claim 13 wherein the kit is packaged at a central facility and transported to the concrete wash water operation.

Assignments (3)

Continuity (11)

References Cited (400)