Abstract: The invention relates to a multilayer material comprising (a) a first layer that consists of plaster or that substantially consists of plaster, and (b) at least one second layer, comprising a sandwich textile fiber material. The fibers of said material are interlinked in a mechanically stable manner, are incombustible and weather-proof and the interspaces are filled with a finely porous material. The second layer has a diffusion-equivalent air layer thickness of not more than 2.0 m and is water-impermeable at a water pressure of at least 100 mm water column. The inventive material can be used outdoors due to its properties. The invention further relates to methods for producing such a material.

Abstract: The invention relates to a multilayer material comprising (a) a first layer that consists of plaster or that substantially consists of plaster, and (b) at least one second layer, comprising a sandwich textile fiber material. The fibers of said material are interlinked in a mechanically stable manner, are incombustible and weather-proof and the interspaces are filled with a finely porous material. The second layer has a diffusion-equivalent air layer thickness of not more than 2.0 m and is water-impermeable at a water pressure of at least 100 mm water column. The inventive material can be used outdoors due to its properties. The invention further relates to methods for producing such a material.

Abstract: A discharge apparatus includes a housing into which a discharge pipe of a carbonization drum opens. A residue discharge chute which starts from the housing opens into a conveying device ending at an outlet. A filling-level meter is disposed at the residue discharge chute. The conveying device has a profiled separating shelf with an end remote from the mouth of the residue discharge chute, at which a bar screen is formed. The bar screen covers a delivery opening for fine residue and ends at the outlet for coarse residue. A vibrator is associated with the conveying device.

Abstract: A method of controlling the ratio of hydration time (HT) to open time (OT) in the manufacture of composite materials from a mixture containing hydratable calcium sulphate such as gypsum binders, aggregates, fibers, water additives and other additives is disclosed. The method includes adding a retarder-accelerator combination such as Retardan and potassium sulphate to the mixture and applying pressure. The retarder-accelerator combination and application of pressure provide advantageous reduction in the ratio HT:OT. More particularly, HT:OT can be reduced to less than 1.

Abstract: A process for producing fibrous composite materials from feed stock formed reliminarily from a gypsum binder and chopped cellulose fibers, and saturating the mixture with water to the extent of at least 1.2 times its normal hydrated state, and beating the material to provide a fleece that is then spread on a flat surface and subjected to pressure for a sufficient length of time to drive out a substantial portion of the moisture from the product. The compression step is carried out long enough to achieve a bulk density of approximately 9/10 the dry bulk density of the components prior to hydration.

Abstract: Durable molded construction parts are disclosed, which are prepared from hydration products of a settable construction material comprising a hydraulically hardening mixture and at least one reinforcing material subject to degradation under alkaline conditions. The construction material has an alkali buffer capacity which does not exceed 0.005 acid equivalents per 100 grams of construction material, as measured in an aqueous suspension of the construction material 24 hours after suspension formation.

Abstract: The invention relates to a building panel constructed in layers, including main layer with a mixture of binder and reinforcing additive, and at least one further layer which can be a facing and/or intermediate layer, the further layer including a reinforcement and a binder. The formation of a homogeneous transitional layer betwee the main layer and the further layer insures that the composition of the components of the individual layers changes gradually so as to provide a stable multilayer panel which was improved elastomechanical properties.

Abstract: A process for manufacturing a multilayer building panel in which one layer s a main layer comprising a binder and a reinforcing additive, and another layer contains a binder and a reinforcement such as a mat includes depositing the various layers such that one layer is deposited with an excess of water for hardening, and another with a deficiency, so that the water is caused to migrate between layers and creates a transition layer providing a gradual and continuous transition in composition between the layers.

Abstract: The present invention is directed to a process for the manufacture of plasterboard optionally strengthened with reinforcing materials by mixing gypsum capable of rehydration with water and optionally reinforcing materials and subsequently pressing the resulting mixture, characterized in that polyisocyanates are added to the mixture used for producing the plasterboard and/or are applied to the surface of the finished plasterboard. The invention is also directed to the optionally reinforced plasterboard.

Abstract: The invention relates to a method for continuous manufacture of materials, specially material slabs, from mixtures of binders, reinforcing agents, and possibly additives, the mixtures being cured by hydrate formation and being of a pourable or spreadable consistency. The special properties and usability of the materials are achieved by a permanent and irreversible compression of the initially-formed structure, whereby an extruded slab is formed from the mixture, then compressed and calibrated. The extruded slab is first compressed in a compression phase at a pressure which is sufficiently high that the slab's thickness after compression is less than the specified value of the finished extruded slab, and its density specified final density, the resulting values of density and degree of compression being sufficiently high that the compressed extruded slab is calibratable immediately thereafter in a calibration phase without the active application of pressure.

Abstract: The invention provides an installation and method for the continuous production of materials using exothermically hardening binders, such as gypsum or cement, comprising a mixing and feeding station and a calibrating unit or press and also a control system for operating the installation.