38 results about "Stucco" patented technology

A method for measuring the weights of phase components in a calcium sulphate material, e.g., gypsum or stucco, in particular for measuring the weights of DH, HH and AIII phases. The method includes (a) weighing a given amount of calcium sulphate material at ambient temperature; (b) placing the weighed calcium sulphate material in a moisture balance at ambient temperature; (c) drying the calcium sulphate material at temperature between 40° C. and 50° C.; (d) waiting until the weight is constant; (e) weighing the dried calcium sulphate material; (f) calculating the weight gain between (a) and (e), the weight gain being related to the amount of AIII phases in the calcium sulphate material.

A gypsum-based construction material can include gypsum core including a stucco component, a siloxane component at a content of not greater than about 2.0 wt. % relative to a content of the stucco component, and a calcium hydroxide catalyst at a content of at least about 0.01 wt. % and not greater than about 0.1 wt. % relative to the content of the stucco component. The gypsum-based construction material can have a pH of at least about 7.5 and not greater than about 10.

A gypsum-based construction material can include gypsum core including a stucco component, a siloxane component at a content of not greater than about 2.0 wt.% relative to a content of the stucco component, and a calcium hydroxide catalyst at a content of at least about 0.01 wt.% and not greater than about 0.1 wt.% relative to the content of the stucco component. The gypsum-based construction material can have a pH of at least about 7.5 and not greater than about 10.

The present invention relates to a high-strength gypsum plasterboard incorporating milled waste mineral wool. The plasterboard comprises milled waste mineral wool in a range of 0.1% to 10% by weight relative to stucco, with fibre lengths ranging from 0.1 to 2000 pm. The milled waste mineral wool enhances the flexural strength and core hardness of the plasterboard. The effective utilization of milled waste mineral wool contributes to sustainability by repurposing industrial by-products and enhancing the performance characteristics of gypsum plasterboards in construction applications.

The present invention relates to a process and an apparatus to cool and heal calcined stucco particles. The process includes feeding stucco particles into an upper portion of a vessel, and feeding a gas comprising air and water into the lower portion of a vessel, wherein the gas cools and substantially fully encapsulates the stucco particles. The apparatus includes a vessel with a rotating spreader for homogenizing the stucco particles, for use in the process described.

A longitudinally-extending casing bead with a base side and an upwardly extending wall along one edge thereof is described that includes an integrated gap portion that extends outwardly from an outer surface of the upwardly extending wall. Importantly, the gap portion configured to both allow an installer to quickly, easily and accurately position the casing bead a predetermined distance from a window or door frame, and allow for the expansion and contraction of the stucco and framing by controlled flexing to prevent the transfer of excessive damage-inducing forces therebetween.

A dry construction plaster composition made with at least stucco in an amount from about 25 to about 99 wt %; hydrated lime in an amount from about 0.5 to about 75 wt %; a phosphate-based lime bucking inhibitor in an amount from about 0.01 to about 1 wt %; and a setting reaction controlling agent, wherein the setting reaction controlling agent comprises a set accelerator, a set inhibitor, or any combination thereof is provided. Methods for preparing construction plaster slurries and pastes with reduced lime bucking and methods for finishing a substrate are also provided.

Disclosed are gypsum boards and methods of board preparation. The board comprises a set gypsum core, with a cover sheet disposed on either side of the core. The core is formed from a mixture containing water, stucco, uncalcined gypsum, and optional additives, the mixture having a low water-to-solids ratio. A hydration reaction occurs between water and stucco. The water amount can be, e.g., 0% to 30%, such as 1% to 25% or 1% to 20%, higher than the stoichiometric amount for hydration. For board preparation, an industrial press (e.g., hydraulic or pneumatic) or rollers can be used to form designated board thickness. Green technology is deployed since less energy is consumed to calcine the gypsum into stucco (inasmuch as some solids content need not be calcined because of the uncalcined gypsum content in the mixture) and for board drying. Improved production efficiencies and high-quality product with strength are achieved.

According to one embodiment, a gypsum-based slurry composition is disclosed. The gypsum-based slurry composition can include a precursor stucco component, a precursor reinforcement component comprising glass fibers coated with a glass fiber coating. The glass fiber coating can comprise PVOH, PVAC, hydrophilic silane, or a combination thereof.

In one aspect, a pottery plaster formulation with increased water absorption, comprising alpha stucco, continuously-calcined-in-a-kettle stucco, and a combination of Rochelle salt and one or more of the following: potassium sulfate and / or a phosphate compound. In another aspect, pottery plaster molds with increased water absorption and methods of making and using the pottery plaster molds for slip casting ceramic items.

Method for manufacturing a mold comprising cracking particles. The invention relates to a method for manufacturing a mold for molten metal comprising at least the following steps: the formation of a mold precursor comprising at least the following substeps: dipping a wax model of the mold in a contact slip; a stucco step with a contact stucco; a drying step; thickening the formed mold precursor, comprising one or more thickening cycles, each thickening cycle comprising at least the following substeps: a dipping step in a reinforcing slip; a stucco step with a reinforcing stucco; a drying step; a finalization step of the thickened mold comprising at least the following substeps: a dewaxing step;and a heat treatment step, the process being characterized in that, during at least one thickening cycle, the reinforcing stucco comprises crack-forming particles. Figure for the abstract: None;

Venexian ProMix is ​​a decorative stucco that combines tradition and modernity. Its unique composition is based on a blend of handcrafted acrylic stucco (65%) and lime stucco (35%), enriched with a handcrafted wax for a glossy finish. The process includes a three-coat application and final polishing, guaranteeing a high-end aesthetic and a low environmental impact.

The present invention relates to a process and an apparatus to cool and heal calcined stucco particles. The process includes feeding stucco particles into an upper portion of a vessel, and feeding a gas comprising air and water into the lower portion of a vessel, wherein the gas cools and substantially fully encapsulates the stucco particles. The apparatus includes a vessel with a rotating spreader for homogenizing the stucco particles, for use in the process described.

The invention discloses a preparation method of a plaster coating based on multi-stage filling and solid waste high-value treatment. The preparation method specifically comprises the following steps: S1, high-value modification; s2, particle size selection; s3, preparing a dry blend; s4, preparing a wet mixed material; the invention relates to the technical field of building materials. According to the stucco coating preparation method based on multi-stage filling and solid waste high-valued treatment, the concept of minimum particle size is introduced through a Dinger-Funk equation, graded matching optimization of multi-stage filling is achieved, the void ratio is reduced, the solid waste mixing amount is increased through high-valued treatment of fly ash and sludge incineration residues, meanwhile, the stucco coating with high compressive strength is obtained, and the stucco coating with high compressive strength is obtained. And collaborative optimization of strength improvement, solid waste absorption and carbon emission reduction is realized.

The invention relates to a method for producing a total gypsum mixture as a spreadable stucco gypsum mixture from dry gypsum with the addition of water, characterised in that the total dry gypsum is divided into a first and a second partial quantity, in that the quantity of the total added water required at least for the first and the second partial quantity corresponds to the stoichiometric water requirement of the gypsum content of the total gypsum mixture, in that the gypsum mixture is produced in a two-stage mixing process, wherein, in a first mixing step, the first partial quantity of the gypsum is produced as a first partial mixture by adding water as a gypsum foam, and in that, in a second mixing step, the second partial quantity is added as a second partial mixture to the first mixture and thus a spreadable gypsum mixture is produced as a total gypsum mixture and the gypsum foam is destroyed again in the process.

The present invention relates to a method for the manufacture of a moisture-resistant plasterboard, comprising : - providing a composition comprising water, stucco, a silicone and a ketene dimer, - casting the composition on a first liner, so as to form a wet gypsum layer on said first liner, - providing a second liner on said wet gypsum layer, thereby forming a wet plasterboard, and - drying the wet plasterboard, so as to form the plasterboard, wherein the weight ratio of silicone to ketene dimer in said composition is from 1 / 50 to 1 / 1. It also relates to a moisture-resistant plasterboard made by such a method. It also relates to a composition comprising water, stucco, a silicone and a ketene dimer, wherein the weight ratio of silicone to ketene dimer in the composition is from 1 / 50 to 1 / 1.

Wall structures include: a wall frame made from a plurality of studs or other structural elements and optionally wall sheathing; first lightweight composite panels fastened to the wall frame to form a first wall substructure; and lightweight composite panels fastened to the wall frame to form a second wall substructure opposite the first. A complete wall can have an interior wall and exterior wall, two interior walls, or two exterior walls. Interior walls may include lightweight composite panels having a polymer, plaster, or paper show surface. Exterior walls may include lightweight composite panels with exterior finish, such as stucco, brick veneers, tiles, or stone. Lightweight composite panels are fastened to the sheathing and / or studs by screws, other mechanical fasteners, and / or adhesive. Lightweight composite panels include a foam core and fiber mesh reinforced cementitious (or other protective) layers formed on the foam core.

Tile 2 for holding a wet mix building material like mortar, stucco, plaster or concrete, and comprising side walls 8a, 8b, 8c, 8d and top 4 and lowermost 6 surfaces, where a grip region 20a, 20b, 20c,

This disclosure relates more particularly to calcium sulfate-based suspensions useful, for example, for making gypsum boards for building construction, as well as methods for using them, for example, for making gypsum boards; in one aspect, this disclosure provides a calcium sulfate suspension composition comprising calcium sulfate basically present in the form of one or more hydrates, the calcium sulfate being present in an amount in the range of 70-99.8% w / w on a dry basis, calculated as stucco; and a cationic starch present in an amount of 0.10-10% w / w of the amount of calcium sulfate as stucco on a dry basis, the cationic starch being substituted by amine and / or ammonium groups and having a %N value in the range of 0.10% pa 2% w / w, and an RVA viscosity value of at least 100 cP at 65 °C and 16% w / w; and water, in a sufficient quantity to form a suspension; the disclosure further provides gypsum-based materials useful as building materials, for example, for use as building boards in the construction of building walls and ceilings.

Exterior wall structures or roofing decks include an exterior wall or roof frame and lightweight composite panels fastened thereto as sheathing and / or substrates to which exterior finishes are applied. Lightweight composite panels include a foam core and protective layers formed over and covering the foam core. The foam core may include extruded polystyrene (XPS), other polymer foam material, or inorganic foam material. The protective layers may include a fiber mesh reinforced cementitious composition, thermoset polymer, or other rigid material. Joints between adjacent composite panels are sealed using sealing tape, polyurethane foam, and / or other sealant Lightweight composite panels can be fastened to studs or trusses suing screws, nails, adhesives, and other fasteners known in the art. The exterior wall structure or roofing deck is strong, waterproof, fire-resistant, resists water damage, and facilitates application of different finishes such as stucco, brick veneers, stone and masonry, shingles, roofing tiles, and metal cladding.

A gypsum-based construction material can include gypsum core including a stucco component, a siloxane component at a content of not greater than about 2.0 wt.% relative to a content of the stucco component, and a calcium hydroxide catalyst at a content of at least about 0.01 wt.% and not greater than about 0.1 wt.% relative to the content of the stucco component. The gypsum-based construction material can have a pH of at least about 7.5 and not greater than about 10.

According to one embodiment, a gypsum-based slurry composition is disclosed. The gypsum-based slurry composition can include a precursor stucco component, a precursor reinforcement component comprising glass fibers coated with a glass fiber coating. The glass fiber coating can comprise PVOH, PVAC, hydrophilic silane, or a combination thereof.

In the present disclosure, a method of forming a gypsum panel is disclosed. The method comprises: providing a first facing material, forming a starch slurry by combining starch and water at a shear rate of 3,000 rpm or more, providing the starch slurry onto the first facing material, depositing a gypsum slurry comprising stucco and water onto the starch slurry on the first facing material, providing a second facing material on the gypsum slurry, and allowing the stucco to convert to calcium sulfate dihydrate.

An agitator for a gypsum wallboard mixer is provided and includes a circular disc with an upper surface, a drive shaft extending vertically from the upper surface, a lump ring secured to the upper surface, the lump ring being provided in a plurality of spaced, adjacent arcuate segments.

Disclosed are gypsum boards and methods of board preparation. The board comprises a set gypsum core, with a cover sheet disposed on either side of the core. The core is formed from a mixture containing water, stucco, uncalcined gypsum, and optional additives, the mixture having a low water-to-solids ratio. A hydration reaction occurs between water and stucco. The water amount can be, e.g., 0% to 30%, such as 1% to 25% or 1% to 20%, higher than the stoichiometric amount for hydration. For board preparation, an industrial press (e.g., hydraulic or pneumatic) or rollers can be used to form designated board thickness. Green technology is deployed since less energy is consumed to calcine the gypsum into stucco (inasmuch as some solids content need not be calcined because of the uncalcined gypsum content in the mixture) and for board drying. Improved production efficiencies and high-quality product with strength are achieved.

Exterior wall structures include exterior walls and lightweight composite panels to which an exterior finish is applied. Exterior wall structures may include wooden or metal studs to which sheathing (e.g., OSB panels or composite sheathing panels) are fastened. A drainage layer can be positioned between sheathing and lightweight composite panels to which an exterior finish is applied. Lightweight composite panels are fastened to sheathing and / or studs by screws, nails, rivets, other mechanical fasteners, and / or adhesive. Lightweight composite panels can include a polymer foam core with interior and exterior surfaces and fiber mesh reinforced cementitious layers formed over and covering the foam core surfaces. Joints between adjacent lightweight composite panels can be sealed using sealing tape, mesh tape and a seam coat, polyurethane foam, and / or other sealants. The exterior wall structure is waterproof, fire-resistant, and facilitates application of different finishes, such as stucco, tiles, or stone, masonry, or brick veneers.

An apparatus and method of producing strand siding boards and / or panels with an irregular, pebbled stucco texture. A multi-layer mat of wood strands is formed on a production line, and a paper overlay is applied to the upper surface of the mat. The mat is then subjected to heat and pressure in a press to consolidate the mat into a board. The press comprises one or more engraved or cast metal top plates, which have been engraved or cast with a stucco impression. The stucco texture also wholly or partially eliminates telegraphing of the underlying strands and flakes in the base manufactured-wood panel.

The present invention is directed to an improved gypsum board, such as an improved sound damping gypsum board, and a method of making such gypsum board. For instance, the method comprises: providing a first encasing layer and a first sound damping layer on the first encasing layer wherein the sound damping layer includes at least 50 wt. % of a first sound damping polymer; depositing a gypsum slurry comprising stucco and water on the sound damping layer to form a gypsum core; providing a second encasing layer on the gypsum slurry; and allowing the stucco to convert to calcium sulfate dihydrate.

The utility model discloses an energy-saving anti-seismic wall which comprises a bearing body, the bearing body is composed of bearing columns on the two sides and a bottom bearing beam, U-shaped fixing grooves are formed in the inner sides of the bearing columns and the inner side of the bottom bearing beam, a wall body is fixedly clamped in the U-shaped fixing grooves, and the wall body is of a multi-layer composite structure and comprises a foam interlayer located in the center layer. Sound insulation layers are arranged on the two sides of the foam interlayer, framework nets are arranged outside the sound insulation layers respectively, heat preservation layers are arranged on the outer layers of the framework nets, flame-retardant layers are arranged on the outer sides of the heat preservation layers respectively, the framework nets, the heat preservation layers and the flame-retardant layers are connected and fixed through anchoring parts, and the outer sides of the flame-retardant layers are coated with painting layers. The foam interlayer is made of straw materials in a compressed mode, and compared with a traditional cement pouring and brick building mode, the foam interlayer effectively disperses and reduces the total weight of the wall body. The stability and the shock resistance of the wall body are enhanced; the purpose of resource recycling is achieved, clay resources are saved, and environment pollution and soil damage caused by brick firing are reduced.

An apparatus and method of producing strand siding boards and / or panels with an irregular, pebbled stucco texture. A multi-layer mat of wood strands is formed on a production line, and a paper overlay is applied to the upper surface of the mat. Tire mat is then subjected to heat and pressure in a press to consolidate the mat into a board. The press comprises one or more engraved or cast metal top plates, which have been engraved or cast with a stucco impression. The stucco texture also wholly or partially eliminates telegraphing of the underlying strands and flakes in the base manufactured-wood panel.