Concrete mixtures and methods of making the same
AssigneeThe Board of Trustees of The University of Alabama
InventorJialai Wang
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Abstract
Disclosed herein is a composition comprising a) of about 80 wt % to about 99 wt % of a cementitious material; b) of about 0.05 wt % to about 3 wt % of a water-soluble organic compound and/or salts thereof, and c) of about 1 wt % to about 20 wt % of carbon dioxide. Additionally, articles comprising the disclosed herein composition are also disclosed. Also disclosed are methods of making the compositions and the articles.
Claims43
A composition comprising:
- a) about 80 wt % to about 99 wt % of a cementitious material;
- b) about 0.05 wt % to about 3 wt % of a water-soluble organic compound and/or salts thereof, wherein the water-soluble organic compound and/or salts thereof comprise at least one oxygen containing functional group along a main chain or a branched chain;
- and
- c) about 1 wt % to about 20 wt % of carbon dioxide.
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A method of forming a composition comprising:
- a) contacting a first cementitious material with a water-soluble organic compound and/or salts thereof to form a first slurry, wherein the water-soluble organic compound and/or salts thereof comprise at least one oxygen containing functional group along a main chain or a branched chain;
- b) contacting the first slurry with a carbon-dioxide-rich gas to form a second slurry;
- and
- c) adding a second cementitious material to the second slurry to form the composition,
- wherein the formed composition comprises:
- i) a total of about 80 wt % to about 99 wt % cementitious material comprising both the first and second cementitious materials;
- ii) about 0.05 wt % to about 3 wt % of a water-soluble organic compound and/or salts thereof;
- and
- iii) about 1 wt % to about 20 wt % of carbon dioxide.
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A method comprising:
- a) contacting a first cementitious material with a water-soluble organic compound and/or salts thereof to form a first slurry;
- b) contacting the first slurry with a carbon-dioxide-rich gas to form a second slurry;
- wherein the second slurry comprising carbonates;
- and
- c) drying and grinding the second slurry into fine powders with a size smaller than about 0.15 mm.
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A method of forming a composition comprising:
- a) mixing a washing water with a waste concrete comprising a first cementitious material to form a diluted mixture of the waste concrete;
- b) removing aggregates from the mixture of the waste concrete to form a waste concrete slurry;
- c) contacting a waste concrete slurry with a water-soluble organic compound and/or salts thereof to form a first slurry;
- d)
- d) contacting the first slurry with a carbon-dioxide-rich gas to form a second slurry;
- and
- e) adding a second cementitious material to the second slurry to form the composition;
- wherein the formed composition comprises:
- i) a total of about 80 wt % to about 99 wt % cementitious material comprising both the first and second cementitious materials;
- ii) about 0.05 wt % to about 3 wt % of a water-soluble organic compound and/or salts thereof;
- and
- iii) about 1 wt % to about 20 wt % of carbon dioxide.
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Dependencies are inferred from the claim text.