A phosphogypsum non-sintered ceramsite light aggregate composed of water and a mixture composed of phosphogypsum, mineral powder and cement. Raw materials of the mixture have weight percentages of phosphogypsum 80-90%, mineral powder 3.3-10%, cement 6.5-10%; the water has a weight of 17% of the total weight of the mixture. A method of preparing the phosphogypsum non-sintered ceramsite light aggregate. The phosphogypsum non-sintered ceramsite light aggregate is prepared by modification, granulation, curing, crushing, sieving and other processes by using phosphogypsum as a main material, cement as an alkaline activator, mineral powder as an active material.

Gypsum panels and methods for their manufacture are provided herein. The gypsum panels include a gypsum core having a first surface and a second opposed surface and a first fiberglass mat associated with the first surface of the gypsum core, such that gypsum from the gypsum core penetrates at least a portion of the first fiberglass mat.

Gypsum panels and methods for their manufacture are provided herein. The gypsum panels include a gypsum core having a first surface and a second opposed surface and a first fiberglass mat associated with the first surface of the gypsum core, such that gypsum from the gypsum core penetrates at least a portion of the first fiberglass mat.

An uncoated nonwoven fibrous mat having a reduced air porosity is disclosed comprising a first plurality of fibers having a length between about 10 mm and 20 mm and an average diameter between about 9 μm and 15 μm; a second plurality of fibers having a length between about 3 mm and 8 mm and an average diameter between about 5 μm and 8 μm; and a binder composition. The uncoated nonwoven fibrous mat has an air porosity less than about 550 CFM.

An uncoated nonwoven fibrous mat having a reduced air porosity is disclosed comprising a first plurality of fibers having a length between about 10 mm and 20 mm and an average diameter between about 9 μm and 15 μm; a second plurality of fibers having a length between about 3 mm and 8 mm and an average diameter between about 5 μm and 8 μm; and a binder composition. The uncoated nonwoven fibrous mat has an air porosity less than about 550 CFM.

A packaged additive for preparing a cementitious composition comprises a water-soluble paper container and at least one non-liquid additive packaged within the water-soluble paper container. A kit for preparing a hardenable cementitious composition comprises the packaged additive and a separate packaged base cementitious material. Also disclosed is a method for preparing a hardenable cementitious composition using the packaged additive and separate base cementitious material components of the kit, and a method for repairing a flaw in a cementitious structure using the hardenable cementitious composition prepared with the packaged additive and the separate base cementitious material.

A packaged additive for preparing a cementitious composition comprises a water-soluble paper container and at least one non-liquid additive packaged within the water-soluble paper container. A kit for preparing a hardenable cementitious composition comprises the packaged additive and a separate packaged base cementitious material. Also disclosed is a method for preparing a hardenable cementitious composition using the packaged additive and separate base cementitious material components of the kit, and a method for repairing a flaw in a cementitious structure using the hardenable cementitious composition prepared with the packaged additive and the separate base cementitious material.

In general, the present invention is directed to the use of particular phosphorus containing compounds for making a glass mat faced gypsum board. The phosphorus containing compound may be a phosphite or a phosphate having a certain formula. In this regard, the present invention is directed to a glass mat faced gypsum board including a gypsum core that is formed from a gypsum slurry comprising such phosphorus containing compound. The present invention is also directed to a method of making a glass mat faced gypsum board.

In general, the present invention is directed to the use of particular phosphorus containing compounds for making a glass mat faced gypsum board. The phosphorus containing compound may be a phosphite or a phosphate having a certain formula. In this regard, the present invention is directed to a glass mat faced gypsum board including a gypsum core that is formed from a gypsum slurry comprising such phosphorus containing compound. The present invention is also directed to a method of making a glass mat faced gypsum board.

In general, the present invention is directed to the use of particular phosphorus containing compounds for making a glass mat faced gypsum board. The phosphorus containing compound may be a phosphite or a phosphate having a certain formula. In this regard, the present invention is directed to a glass mat faced gypsum board including a gypsum core that is formed from a gypsum slurry comprising such phosphorus containing compound. The present invention is also directed to a method of making a glass mat faced gypsum board.