Extruded gypsum-based materials
AssigneeThe Intellectual Gorilla GmbH
InventorsEvan R. Daniels, Per Just Andersen
Life of this patent
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Abstract
An extrudable gypsum-based material is formed from a mixture that includes gypsum in the range of about 40 to 90% by dry weight percent, a secondary material in the range of about 0.1 to 50% by dry weight percent, a reinforcement fiber in the range of about 1 to 20% by dry weight percent, a rheology modifying agent in the range of about 0.5 to 10% by dry weight percent, a retarder in the range of about 0.1 to 8% by dry weight percent, a water in the range of 10 to 50% of a total wet material weight.
Claims21
An extrudable gypsum-based material formed from a mixture comprising:
- a calcium sulfate hemihydrate in the range of about 40 to 90% by dry weight percent;
- a secondary material in the range of about 0.1 to 50% by dry weight percent selected from sand, cement, fly ash, slag, rock, expanded light weight aggregate, or a combination thereof;
- a reinforcement fiber in the range of about 1 to 20% by dry weight percent;
- a rheology modifying agent in the range of about 0.5 to 10% by dry weight percent selected from a polysaccharide, a polysaccharide derivative, a protein, a protein derivative, a synthetic organic material, a synthetic organic material derivative, or a combination thereof;
- a retarder in the range of about 0.1 to 8% by dry weight percent;
- a water in the range of 16 to 25% of a total wet material weight;
- and
- the mixture is extrudable.
A method for manufacturing an extrudable gypsum-based material comprising the steps of:
- mixing a calcium sulfate hemihydrate in the range of about 40 to 90% by dry weight percent, a secondary material in the range of about 0.1 to 50% by dry weight percent selected from sand, cement, fly ash, slag, rock, expanded light weight aggregate, or a combination thereof, a reinforcement fiber in the range of about 1 to 20% by dry weight percent, a rheology modifying agent in the range of about 0.5 to 10% by dry weight percent selected from a polysaccharide, a polysaccharide derivative, a protein, a protein derivative, a synthetic organic material, a synthetic organic material derivative, or a combination thereof, and a retarder in the range of about 0.1 to 8% by dry weight percent with water in the range of 16 to 25% of a total wet material weight;
- extruding the mixture through a die using an extruder;
- and
- allowing the extruded mixture to set.
Dependencies are inferred from the claim text.