Abstract:
Foamed fiber compositions and processes of making said compositions. Compositions include a hydraulic mixture including (i) a polymer and (ii) one or more of gypsum, fly ash, and cement; and a foam including a foaming agent, a foam stabilizer, and 0.5-35% fibers by weight. The process for forming the foamed fiber composition includes providing a stable foam including a foaming agent and a foam stabilizer; mixing fibers into the stable foam until the fibers are uniformly distributed in the foam to form a fiber-containing foam, wherein the fiber-containing aqueous foam contains 0.5-35% fibers by weight; and mixing the fiber-containing foam into a hydraulic slurry including (i) a polymer and (ii) one or more of gypsum, fly ash, and cement. The composition is suitable for use in roof tiles, underlayments, backerboards, cement composites, foam fills, bricks, cement sidings, etc.
Abstract:
The invention relates to fire resistance elements, which comprise a gypsum-based porous material. According to one embodiment, the gypsum-based porous material contains an amphiphilic additive, which comprises a head group as a hydrophilic end and a hydrocarbon chain as a hydrophobic end, wherein the hydrophobic end has a molecular mass of less than 300 g/mol. According to a further embodiment, the porous material is foamed, wherein pores of the porous material have at least partially hydrophobic particles on the inner walls of said pores. According to a further embodiment, the porous material has macropores having a median diameter of the macropores between 0.1 mm and 5 mm, wherein the fire resistance element has a first region, and wherein the diameter of the macropores within the first region has a distribution width of less than 0.45 times the median diameter of the macropores. According to a further embodiment, the porous material has macropores having a median diameter of the macropores between 0.1 mm and 5 mm, wherein the fire resistance element has a first region, and wherein the density of the fire resistance element in the first region has a distribution width of less than 5%. The invention further relates to a component comprising a fire resistance element and tommethods for producing a fire resistance element.
Abstract:
Es wird eine Reaktionsharz-Zusammensetzung zur chemischen Befestigung von Verankerungsmitteln in Bohrlöchern und zum baulichen Kleben beschrieben. Die Zusammensetzung umfasst einen Harzbestandteil (A), der mindestens eine radikalisch härtbare Verbindung (a-1) und mindestens ein Epoxidharz (a-2), das im Durchschnitt mehr als eine Epoxidgruppe pro Molekül enthält, enthält und einen Härterbestandteil (B), der ein Härtungsmittel für die mindestens eine radikalische Verbindung (b-1) und mindestens ein Amin (b-2) enthält, wobei die Verbindungen (a-1) und (b-1) sowie die Verbindungen (a-2) und (b-2) jeweils reaktionsinhibierend räumlich getrennt voneinander sind, mit der Maßgabe, dass die Zusammensetzung keine Cu-, Mn- und Eisenverbindung und keine verbrückende Verbindung enthält. In der Harzkomponente liegt das Verhältnis von Doppelbindungswert zu Epoxidwert n DB: n EP zwischen 0,01 und 0,55 oder zwischen 5 und 50.
Abstract:
Disclosed is a method and apparatus for manufacture of an aggregate material. The aggregate is made by obtaining a source of plastics material, whether of the same or different plastics types. The plastics material is then heated and mixed into a substantially homogenous melt or bound melt of heterogeneous plastics. This melt is then extruded through at least one extrusion head. The flow of extrudate is then interrupted to form individual pieces of aggregate. The formed aggregate having a textured surface to improve its keying in a cementitious or similar material.
Abstract:
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.
Abstract:
The present invention relates to a concrete composition which is economical and environmentally friendly by: utilizing oxidizing slag which is a by-product generated during an electric arc furnace steelmaking process as a fine aggregate; enhancing the entire strength of the concrete; and drastically reducing the cement content within the concrete, and relates specifically to a high performance concrete composition using slag which comprises 8-16 weight% of rapid-hardening cement, 3-6 weight% of water, 28-59 weight% of fine aggregate, and 30-50 weight% of coarse aggregate, wherein 30-100% of the fine aggregate is slag. Strength can be enhanced and manufacturing costs can be saved by reducing the content of cement constituting the above-mentioned concrete composition and replacing most of the fine aggregate with electric arc furnace oxidizing slag.
Abstract:
Embodiments of the present invention provide cellular phosphate bodies formed using specialized steps to ensure a specific strength range, and specifically a compressive strength less than 100 pounds per square inch. Further embodiments relate to uses for various phosphate ceramics as vehicle arresting systems.
Abstract:
Solid compositions, and methods of forming the same, which are suitable for use as a construction materials. The.compositions include a complex formed from reaction of a solid hydrated inorganic salt and a solid amide compound, for example, a sulphate-urea complex, a carbonate-urea complex, a borate-urea complex or a magnesium-urea complex. The water of hydration released from the reaction may be present, as may additives, such as for example a polymer compound such as polypropylene, polyethylene, polyurethane, ethyl vinyl acetate (EVA), polyurea, polyurea-formaldehyde, ethylene/acrylic acid copolymer, polyisocyanurates, polyvinyl chloride (PVC)3 polyepoxides, silicon and organo silicon polymers, fluoro polymers, phenolic oligoesters, polyimides and polystyrene.
Abstract:
A composition for a slurry for manufacture of a building panel includes one or more fillers, one or more binders and water. One or more fillers is an expanded perlite at least partially covered with a film-forming, thermoplastic polymer coating Some embodiments use calcined or uncalcined gypsum as a binder or filler. One embodiment is a building panel that includes a solid matrix of calcium sulfate dihydrate crystals bound to expanded perlite. A method of making the panel includes acquiring expanded perlite and coating it with film-forming, thermoplastic polymer coating. After the expanded perlite is prepared, it is combined with water other optional fillers and one or more binders to form a slurry. The slurry is shaped into a panel and allowed to dry.
Abstract:
A filler component for making an investment casting slurry, which comprises: a major portion of finely divided silica, aluminum silicate, alumina, zircon, or mixtures thereof; and a minor portion of one or more finely divided materials having particles in which, on average, at least one dimension of the particle is at least about four times greater than at least one other dimension of the particle. Typically, the particles are of generally plate-like or needle-like shape.