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US 2019/0168416 A1Published application
Methods and compositions for treatment of concrete wash water
AssigneeCarboncure Technologies Inc.
InventorsGeorge Sean Monkman, Mark MACDONALD, Dean Paul FORGERON
Life of this patent
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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.
Claims25
A method of preparing a concrete mix comprising
- (i) adding concrete materials to a mixer;
- (ii) adding mix water to the mixer, wherein the mix water comprises carbonated concrete wash water;
- and
- (iii) mixing the water and the concrete materials to produce a concrete mix.
1 more element
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An apparatus for carbonating wash water produced in the production of concrete in a wash water operation wherein the wash water comprises cement and/or supplementary cementitious materials (SCM), comprising
- (i) a source of carbon dioxide;
- (ii) a first conduit operably connected to the source of carbon dioxide that runs to a wash water container, wherein
- (a) the wash water container contains wash water from a concrete production site;
- (b) the conduit has one or more openings positioned to deliver carbon dioxide at or under the surface of the wash water in the container to produce carbonated wash water;
- (iii) a system to transport the carbonated wash water to a concrete mix operation where the carbonated wash water is used as mix water in a concrete mix.
2 more elements
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An apparatus for preparing a concrete mix comprising
- (i) a first mixer for mixing concrete materials and water;
- (ii) a second mixer for mixing concrete materials and water;
- (iii) a first water container holding water that comprises carbonated concrete wash water;
- (iv) a second water container, different from the first, holding water that is not carbonated concrete wash water;
- (iv) a first system fluidly connecting the first water container with the second mixer and a second system fluidly connecting the second water container with the first mixer.
2 more elements
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Dependencies are inferred from the claim text.