MODULATION OF THIXOTROPIC PROPERTIES OF CEMENTITIOUS MATERIALS

摘要

The invention provides methods and compositions for increasing stiffness or rate of stiffening of concrete mixes by carbonation of the mix, preferably while viscosity remains at a level suitable for the intended use of the concrete mix.

主权项

1. A method of carbonating a wet concrete mix having a mix design and to be used in an operation to produce a carbonated wet concrete mix, wherein the carbonated concrete mix has a desired stiffness and/or rate of stiffening that is greater than a stiffness and/or rate of stiffening of an uncarbonated concrete mix of the same mix design, comprising contacting the wet concrete mix with a pre-determined dose of carbon dioxide during mixing, wherein the pre-determined dose of carbon dioxide is known or predicted to produce the desired stiffness and/or rate of stiffening under the conditions of the mixing and/or operation.