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US 12,508,738 B2Granted
Methods and compositions for treatment of concrete wash water
AssigneeCarboncure Technologies Inc.
InventorsGeorge Sean Monkman, Paul J. Sandberg, Kevin Cail, Dean Paul Forgeron, Mark Macdonald
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Abstract
The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.
Claims15
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.
11 more elements
Dependencies are inferred from the claim text.