摘要:
A mixture is used in conjunction with water is used for preparing a slurry that hydrates to form an exterior gypsum cement. The mixture includes 30-70 % by weight hydraulic cement, 30-70 % by weight calcined gypsum and 0.05-2.5 % polycarboxylate. When the mixture is added to water less than 40 weight % based on the weight of the mixture, a slurry is formed that expands very little while it cures.
摘要:
Methods for preparing porous inorganic coatings (50) on porous supports (10) using certain pore formers such as protein, starch or synthetic polymer particles, and porous supports coated with porous inorganic coatings. The porous inorganic coatings may serve as membranes useful in, for example, liquid-liquid, liquid-particulate, gas-gas, or gas-particulate separation applications.
摘要:
Die vorliegende Erfindung betrifft pastöse oder gelförmige Pigmentzubereitungen zum Einfärben von kalk- und/oder zementgebundenen Baustoffen, Asphalt, Farben, Lacken, Papier oder Kunststoffen sowie ein Verfahren zu deren Herstellung.
摘要:
The invention relates to a dry construction material mixture (bulk density 30-40 Newton/mm2), and a better coverage rate during the application thereof.
摘要:
Disclosed are formulations adapted to form a foamed cementitious composition, the foamed cementitious composition itself, a method of forming a hydraulic binder foam, and a method of conveying and applying the resulting foam to a substrate. A pumpable cementitious slurry is formed, the slurry is mixed with a gas such as air, and is subjected to mechanically created turbulence to generate gas bubbles and create a foam, which preferably is stabilized by a foam stabilizing agent such as polyvinyl alcohol present in the slurry. The foam is then conveyed to a nozzle or other suitable dispense point from which it is applied, for example sprayed, preferably uniformly, onto a substrate to be coated. Prior to dispensing, a set accelerator is preferably injected, which causes the foam to gel, which in turn improves the hangability of the product on a substrate. The spray material adheres to the substrate and hardens to form an insulative coating on the substrate. Also disclosed are dry compositions comprising a hydratable cementitious binder, a mechanical foam stabilizing agent, and optionally a fibrous component, set retarder and air entraining agent, said composition providing, on the addition of water, gas and mechanical turbulence, a settable foam which is capable of spray application to a steel structural member and which, after spray application, is adherent to the member in the foamed state and after setting. The foam after setting, forms a fire and heat protective adherent coating on the member.
摘要:
In conjunction with water, a mixture can be used to prepare a sprayable slurry that hydrates to form a machinable plaster composition. The mixture includes from about 80% to about 98% by weight calcium sulfate hemihydrate, from about 1 % to about 5% by weight adhesive binder for adhering said plaster mixture to a substrate and from about.001 % to about 10% of a polysaccharide. The mixture is made into a slurry by the addition of from 10% to about 50 weight water based on the weight of the mixture.
摘要:
A well cement composition for cementing casing strings in deep water offshore formations penetrated by well bores, the composition comprising a single hydraulic cement, water, an environmentally degradable water reducing and dispersing additive, an environmentally degradable set retarding additive and an environmentally degradable compressive strength and set accelerating additive. The compositions may also include a gas and a foaming and foam stabilising agent.
摘要:
Es wird ein Bindemittel für Putze, Farben, Steinlasuren oder Hinterfüll- oder Vergießmassen mit folgender Zusammensetzung beschrieben: 60 - 90 Gew.-% Kalkhydrat oder hydraulischer Kalk (sulfatarm unter 1 %), 1 -7 Gew.-% Harnstoff CO(NH 2 ) 2 und/oder Tillmann O.F.T.-Verflüssiger und/oder Naphthalin- oder Melamin-Formaldehyd-Kondensations-produkte, 2 - 9 Gew.-% Casein, 0,05 - 10 Gew.-% Glucose und/oder Rohrzucker, 1 - 15 Gew.-% Kieselgur, 5 - 20 Gew.-% Marmormehl und/oder Kalkgesteinsmehl und/oder Kreide. Es wird weiterhin ein Verfahren zum Herstellen eines Bindemittels beschrieben, bei dem die Bestandteile des Bindemittels, insbesondere Kalkhydrat oder hydraulischer Kalk, trocken in einer Mischvorrichtung mit rotierenden Schlag- oder Schneidwerkzeugen mit einer Umdrehungsgeschwindigkeit von etwa 2000 bis etwa 4000 U/s etwa 5 bis 15 min. gemischt werden.
摘要:
Vorgeschlagen wird ein Verfahren zur Verzögerung des Abbindens von Gips, welches sich dadurch auszeichnet, daß man Kondensationsprodukte von enzymatisch gewonnenen Proteinhydrolysaten mit Formaldehyd einsetzt.