Method and apparatus for curing concrete products
First Claim
1. In a method of rapidly manufacturing concrete or like products having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the molded product to an atmosphere in a chamber consisting of at least 95%, excluding water vapor, carbon dioxide gas, the improvement which comprises feeding carbon dioxide gas at a temperature in the range of about 0°
- to -70°
F. to said chamber during the movement of the molded product therein, continuing the feed so as to cause an exothermic temperature rise in the molded product and exposing the molded product to the carbon dioxide gas for no more than 5 minutes.
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Accused Products
Abstract
A method and apparatus for rapidly manufacturing concrete or like poducts having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the shape to an atmosphere in a chambr consisting essentially of carbon dioxide gas, wherein ultracold carbon dioxide gas is fed to said chamber during the movement of the shape therein and continuing the feed so as to cause an exothermic temperature rise in the shape.
101 Citations
13 Claims
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1. In a method of rapidly manufacturing concrete or like products having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the molded product to an atmosphere in a chamber consisting of at least 95%, excluding water vapor, carbon dioxide gas, the improvement which comprises feeding carbon dioxide gas at a temperature in the range of about 0°
- to -70°
F. to said chamber during the movement of the molded product therein, continuing the feed so as to cause an exothermic temperature rise in the molded product and exposing the molded product to the carbon dioxide gas for no more than 5 minutes. - View Dependent Claims (2, 3, 4, 5, 6)
- to -70°
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7. A method of rapidly manufacturing building blocks products having an advanced state of cure comprising the steps of blending together portland cement, aggregate, and water in selected quantities sufficient to form a sufficiently low moisture mix to maintain its shape after molding into a shape during the subsequent curing, molding the mixture to have a predetermined shape, maintaining the molded product at a temperature of 60°
- -65°
F., exposing the molded product having a temperature of 60°
-65°
F. to an atmosphere of at least 95%, excluding water vapor, carbon dioxide gas by moving the molded product through a chamber while feeding carbon dioxide gas at a temperature in the range of about 0°
to -70°
F. to the chamber during the movement of the molded product therein and continuing the exposure of the molded product to the carbon dioxide gas feed for a time sufficient to cause an exothermic temperature rise in the molded product. - View Dependent Claims (8, 9)
- -65°
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10. In an apparatus for the manufacture of concrete and like products having means for blending a desired cementitious mixture, means for molding the mixture to desired configurations, and for delivering the molded product thus formed for movement along a predetermined path, conveying means for moving the molded product thus formed to and through a chamber means, and chamber means substantially closed against the introduction of external air of the like for exposing the molded product to carbon dioxide gas during the movement thereof through the chamber means, the improvement which comprises means for feeding carbon dioxide gas at a temperature in the range of about 0°
- to -70°
F. into said chamber. - View Dependent Claims (11, 12, 13)
- to -70°
Specification