Use of CO2 as Water Demand Reducer in Gypsum Stucco Rehydration Mortars
AssigneeKnauf Gips KG
InventorsMartin Halbach, Giacomo Lo Moro
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Abstract
The present application concerns a method for the production of a gypsum article, which includes introducing a measured quantity of carbon dioxide into the process water and mixing the stucco with the thus treated water. The CO2-enriched water has the advantage of providing compositions with sufficient processing properties at considerably lower water contents, thus allowing for significant energy savings. The invention also concerns slurries prepared according to this method as well as an apparatus which is adapted to implement this method.
Claims15
A method for producing a gypsum article, wherein the method comprises introducing a measured quantity of carbon dioxide into a process water and mixing stucco with the thus treated process water to form a slurry, wherein the addition of carbon dioxide to the process water results in a reduction of the amount of process water necessary to achieve a given fluidity of the slurry.
An apparatus for preparing a slurry comprising a mixture of at least stucco and process water, wherein means are provided upstream of a mixer in which the stucco is mixed with the process water, wherein the means 1 allow for the directed introduction of carbon dioxide into the process water.
Dependencies are inferred from the claim text.