Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A height measuring system can be used to determine the relative amount the cementitious board sags as it passes over an unsupported span disposed between the forming station and the cutting station and to correlate the measured sag distance with a value of percent hydration of the cementitious slurry of that particular portion of the cementitious board.

Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A height measuring system can be used to determine the relative amount the cementitious board sags as it passes over an unsupported span disposed between the forming station and the cutting station and to correlate the measured sag distance with a value of percent hydration of the cementitious slurry of that particular portion of the cementitious board.

A building product comprises calcium sulphate dihydrate particles bound by an organic binder. The calcium sulphate dihydrate particles each have a longest dimension and a lateral dimension, wherein the lateral dimension corresponds to the maximum breadth of the particle about the axis defined by the longest dimension. The calcium sulphate dihydrate particles have a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension.

A building product comprises calcium sulphate dihydrate particles bound by an organic binder. The calcium sulphate dihydrate particles each have a longest dimension and a lateral dimension, wherein the lateral dimension corresponds to the maximum breadth of the particle about the axis defined by the longest dimension. The calcium sulphate dihydrate particles have a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension.

The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assessing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization. A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate.

The invention refers to the gypsum industry and the construction industry, in particular to a method for obtaining a water/gypsum mixture used to manufacture gypsum products. The technical result of the invention is continuous industrial manufacturing of water/gypsum mixture at critically low water/gypsum ratio while maintaining high fluidity of the mixture. The said technical result is achieved because a method for continuous manufacturing water/gypsum mixture at a water/gypsum ratio of less than 0.25:1 is implemented by using a portion of the mixture as a transport medium for introducing new batches of liquid and dry components and includes the following stages: pre-mixing a flow of fluid water/gypsum mixture and dry components; obtaining, in the mixer, a finished water/gypsum mixture with the specified water/gypsum ratio by intensively mixing the pre-mixed dry components and fluid water/gypsum mixture flow; releasing a portion of the finished water/gypsum mixture flow from the process cycle and returning the remaining portion of the finished water/gypsum mixture to the mixing process as a transport medium for introducing new components; obtaining a fluid water/gypsum mixture flow after adding liquid components to the remaining portion of the water/gypsum mixture flow with subsequent mixing.

The invention refers to the gypsum industry and the construction industry, in particular to a method for obtaining a water/gypsum mixture used to manufacture gypsum products. The technical result of the invention is continuous industrial manufacturing of water/gypsum mixture at critically low water/gypsum ratio while maintaining high fluidity of the mixture. The said technical result is achieved because a method for continuous manufacturing water/gypsum mixture at a water/gypsum ratio of less than 0.25:1 is implemented by using a portion of the mixture as a transport medium for introducing new batches of liquid and dry components and includes the following stages: pre-mixing a flow of fluid water/gypsum mixture and dry components; obtaining, in the mixer, a finished water/gypsum mixture with the specified water/gypsum ratio by intensively mixing the pre-mixed dry components and fluid water/gypsum mixture flow; releasing a portion of the finished water/gypsum mixture flow from the process cycle and returning the remaining portion of the finished water/gypsum mixture to the mixing process as a transport medium for introducing new components; obtaining a fluid water/gypsum mixture flow after adding liquid components to the remaining portion of the water/gypsum mixture flow with subsequent mixing.

An apparatus for production of a gypsum product is provided which comprises a conveyer comprising a conveyer belt and means for rotating the conveyer belt; means for forming a gypsum product; and at least one laser scanner positioned over the conveyer belt at the location where the scanner scans at least one edge of the gypsum product which is at least partially set; and the laser scanner is in communication with a processor. Methods for forming a gypsum product with the apparatus are provided as well.

An apparatus for production of a gypsum product is provided which comprises a conveyer comprising a conveyer belt and means for rotating the conveyer belt; means for forming a gypsum product; and at least one laser scanner positioned over the conveyer belt at the location where the scanner scans at least one edge of the gypsum product which is at least partially set; and the laser scanner is in communication with a processor. Methods for forming a gypsum product with the apparatus are provided as well.

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.