A process for producing a mineral foam includes (i) separately preparing one or more slurries of cement, and an aqueous foam for which a D50 of bubbles is less than or equal to 400 m; (ii) homogenizing the one or more slurries of cement with the aqueous foam to obtain a slurry of foamed cement; (iii) casting the slurry of foamed cement and leaving the cast slurry of foamed cement to set.

A method for performing selective bacteriostasis of a sulfate-reducing bacterium, the method selectively inhibiting proliferation of the sulfate-reducing bacterium by allowing chelated Al to coexist in an environment where the sulfate-reducing bacterium exists, and a gypsum composition containing calcined gypsum (A) and chelated Al (B), in which the chelated Al (B) is contained in a range of 0.01 to 20 mass parts relative to 100 mass parts of the calcined gypsum (A).

A method for performing selective bacteriostasis of a sulfate-reducing bacterium, the method selectively inhibiting proliferation of the sulfate-reducing bacterium by allowing chelated Al to coexist in an environment where the sulfate-reducing bacterium exists, and a gypsum composition containing calcined gypsum (A) and chelated Al (B), in which the chelated Al (B) is contained in a range of 0.01 to 20 mass parts relative to 100 mass parts of the calcined gypsum (A).

Composition for building materials comprises of fly ash from flue gas desulfurization. The fly ash (CaSO.sub.4 anhydrite), obtained from circulating fluidized bed flue gas desulfurization, is mixed with binder reactants at a ratio of 9:1. It's mainly used for non-structural cement mortar, bricks for paving walkways, brick wall decors, fire-resistant walls for interior partitions, plasterboards and so on. The binder reactants compose of 70% CaSO.sub.4.H.sub.2O, 10% Na.sub.2SO.sub.4, 10% CaO, 5% NaOH, 05% cement and 05% starch. When the binder reactants are mixed with fly ash and water (30% to 40% of the above total weight), the hydration process of CaSO.sub.4 anhydrite is accelerated.

Gypsum panels, sheathing systems, and methods of making and using the same are provided. A gypsum panel includes a gypsum core associated with a first fiberglass mat having a continuous barrier coating, the coating penetrating a portion of the first fiberglass mat opposite the gypsum core, wherein gypsum penetrates a remaining fibrous portion of the first fiberglass mat such that voids in the first fiberglass mat are substantially eliminated. A building sheathing system includes at least two gypsum panels and a seaming component to provide a seam at an interface between the gypsum panels.

Gypsum panels, sheathing systems, and methods of making and using the same are provided. A gypsum panel includes a gypsum core associated with a first fiberglass mat having a continuous barrier coating, the coating penetrating a portion of the first fiberglass mat opposite the gypsum core, wherein gypsum penetrates a remaining fibrous portion of the first fiberglass mat such that voids in the first fiberglass mat are substantially eliminated. A building sheathing system includes at least two gypsum panels and a seaming component to provide a seam at an interface between the gypsum panels.

A composite structure for use in tiling surfaces is disclosed. The composite structure can include a fiber matrix impregnated with a water-activated setting material. The composite structure can be wet and then compressed between a tile and an application surface. The composite structure can cure to provide a support surface for the tile.

A composite structure for use in tiling surfaces is disclosed. The composite structure can include a fiber matrix impregnated with a water-activated setting material. The composite structure can be wet and then compressed between a tile and an application surface. The composite structure can cure to provide a support surface for the tile.

The present invention is directed to a gypsum panel with an enhanced gypsum core to facing material bond and a method of making such gypsum panel. In one embodiment, the gypsum panel comprises a gypsum core, a first facing material, and a second facing material. The first facing material and/or the second facing material having a nucleating composition applied to a surface thereof. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry onto the first facing material, providing a second facing material on the gypsum slurry, and providing a nucleating composition on the first facing material before depositing the gypsum slurry onto the first facing material, on the gypsum slurry before providing the second facing material on the gypsum slurry, on the second facing material before providing the second facing material on the gypsum slurry, or a combination thereof.

The present invention is directed to a gypsum panel with an enhanced gypsum core to facing material bond and a method of making such gypsum panel. In one embodiment, the gypsum panel comprises a gypsum core, a first facing material, and a second facing material. The first facing material and/or the second facing material having a nucleating composition applied to a surface thereof. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry onto the first facing material, providing a second facing material on the gypsum slurry, and providing a nucleating composition on the first facing material before depositing the gypsum slurry onto the first facing material, on the gypsum slurry before providing the second facing material on the gypsum slurry, on the second facing material before providing the second facing material on the gypsum slurry, or a combination thereof.