Gypsum composites containing cementitious materials and methods of making the same are provided. Gypsum composites include gypsum and a cementitious material. Methods of making gypsum composites include combining gypsum stucco, water, and a cementitious material to form a slurry, and setting and drying the slurry to form a gypsum composite.

Gypsum composites containing cementitious materials and methods of making the same are provided. Gypsum composites include gypsum and a cementitious material. Methods of making gypsum composites include combining gypsum stucco, water, and a cementitious material to form a slurry, and setting and drying the slurry to form a gypsum composite.

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum -hemihydrate occurs; and/or (ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum -hemihydrate occurs is reached; wherein a heating time is selected sufficient for completion of the process of gypsum -modification formation within the gypsum lumps, and wherein the heating is performed under atmospheric pressure through lump surface.

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum -hemihydrate occurs; and/or (ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum -hemihydrate occurs is reached; wherein a heating time is selected sufficient for completion of the process of gypsum -modification formation within the gypsum lumps, and wherein the heating is performed under atmospheric pressure through lump surface.

A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 1-30% by weight of a latex emulsion binder, 30-80% by weight calcium sulfate hemihydrate, up to about 8% by weight of a set inhibiting agent and 20-60% by weight water.

A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 1-30% by weight of a latex emulsion binder, 30-80% by weight calcium sulfate hemihydrate, up to about 8% by weight of a set inhibiting agent and 20-60% by weight water.