Abstract:
A method of preparing a mortar composition, comprising mixing of mortar materials comprising at least 25 to 45 parts by weight of high-early-strength portland cement, 40 to 60 parts by weight of sand, 0.05 to 0.12 parts by weight of polycarboxylic acid-based powdered water reducing agent, and 10 to 25 parts by weight of water, and not comprising any organic adhesives. Mixing of the mortar materials is achieved by agitating the same in an agitator until agitating load rapidly decreases. The mortar composition prepared in accordance with this invention has excellent ability to infiltrate into the surface to be adhered, and high bonding strength after hardening.
Abstract:
A laboratory reactor (1) with a reaction vessel (2) for receiving media or substances to be processed has devices or units for processing or mixing media or components and for measuring, the devices or units being able to engage in the reaction vessel or reactor vessel (2) from above or below. On the lower side of the base (5), the laboratory reactor (1) has placement feet (6) which are mounted movably or flexibly and are connected to a weight measuring device or to sensors belonging to a weight-measuring device such that the weight of the product to be processed or a change in weight can be determined without complicated additional weighing operations.
Abstract:
The invention relates to a magnetic mixing system comprising a mixing body, which is located in a container filled with a medium and which can be made to rotate by a rotating magnetic field that is generated by a solenoid system, and comprising an electronic controller and regulator. According to the invention, the inactivity of the mixing body can be detected and/or conclusions concerning the viscosity of the medium can be drawn and/or the height of the magnetic field can be modified in order to transfer the mixing body to a floating state and/or the electronic controller and regulator is at a location that is remote from the solenoid system. The magnetic mixing system permits the mixing of a medium in the form of a liquid, a liquid-solid mixture, a liquid-gas mixture, a gas-solid mixture or a liquid-gas-solid mixture by means of the mixing body.
Abstract:
There is disclosed a method for controlling an ice cream freezer where a scraper shaft is driven with variable rotational speed for providing a desired working of an ice cream. Moreover, there is disclosed an ice cream freezer that may utilize such a control and which has means enabling control according to the above principle.
Abstract:
An agitation system including a motor that is capable of measuring the torque output of the motor required to mix a suspension. The motor is attached to an agitator which is placed in a suspension to be measured. The agitator is placed in the suspension and the agitation system is turned on for a period of time. This period determined by the type of agitator used and the characteristics of the suspension. When the suspension is well mixed and the torque measurement on the agitator becomes stable, the agitation system is stopped. The suspension is allowed to sit without agitation for a period of time and the agitation system is started again. After a period of time the agitation system is started and the amount of torque needed to begin turning the agitator is measured.
Abstract:
Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resistance of the liquid to rotation of the device. Both rheological and calorimetric testing can be performed during mixing, which ensures uniformity of rheology and hence the accuracy of results.
Abstract:
The present invention provides methods of making sticky powder comprising mixing one or more resin or (co)polymer powders in one or more mixing devices without agglomerating the powders and while measuring the power, work or torque drawn by the mixing devices, the mixing continuing until the measure of the power or torque drawn indicates that the powders have become sticky. The mixing further comprises adding to the powders one or more dry materials and mixing to so that the dry materials adhere or “bond” to the sticky powders. Alternatively, the methods further comprise slowing or stopping the mixing, or cooling while mixing once the said sticky powders have been formed, adding one or more dry materials to form a sticky powder mixture, and further mixing to bond the sticky powders and the dry materials together. The dry materials may comprise one or more flake materials, e.g. metallic flakes; layered pigments, clays, catalysts or antimicrobials; resins or (co)polymers; cyroprocessed materials, and materials encapsulated or dispersed in brittle materials. The methods may be automated.
Abstract:
Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resistance of the liquid to rotation of the device. Both rheological and calorimetric testing can be performed during mixing, which ensures uniformity of rheology and hence the accuracy of results.
Abstract:
Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resistance of the liquid to rotation of the device. Both rheological and calorimetric testing can be performed during mixing, which ensures uniformity of rheology and hence the accuracy of results.
Abstract:
Devices and methods for controlling and monitoring the progress and properties of multiple reactions are disclosed. The method and apparatus are especially useful for synthesizing, screening, and characterizing combinatorial libraries, but also offer significant advantages over conventional experimental reactors as well. The apparatus generally includes multiple vessels for containing reaction mixtures, and systems for controlling the stirring rate and temperature of individual reaction mixtures or groups of reaction mixtures. In addition, the apparatus may include provisions for independently controlling pressure in each vessel, and a system for injecting liquids into the vessels at a pressure different than ambient pressure. In situ monitoring of individual reaction mixtures provides feedback for process controllers, and also provides data for determining reaction rates, product yields, and various properties of the reaction products, including viscosity and molecular weight. Computer-based methods are disclosed for process monitoring and control, and for data display and analysis.