| | | Automatic Blaine apparatus ToniPERM (Type 6565) The specific surface according to Blaine is an indirect measure for the grain size and has a decisive influence on the strength values of cement. Therefore, an exact, simple and quick determination is of decisive importance already during the production process (in the cement mill). ToniPERM is an automated, microprocessor-controlled Blaine device and particularly suitable for the quick determination of operating characteristic values. It consists of a microprocessor control unit (similar to ToniTROL) and a measuring tower, optionally with one or two measuring cells. The powdered material to be tested is compressed to a defined volume in the enlarged measuring cell (according to Dyckerhoff). After having placed the measuring cell(s) onto the measuring tower and after having entered the test-specific specimen data, the test is carried out and evaluated fully automatically. The Blaine-value is calculated out of the single values of a preselected number of tests and, if necessary, out of two measuring cells. | | |
| | | Both variants are controlled by a MS Windows-based software whereby individual test intervals may be selected for each specimen. The current setting condition of the different specimens can be read in the corresponding program windows at any time. The moments of time for the beginning, resp. the end of setting are automatically calculated in accord. with the specifications set up after comparison measurements. Heat flow-differential-calorimeter ToniCAL cement, mortar and concrete All devices are used to determine the setting heat of hydraulic building materials. For this purpose, the microprocessor continuously records the generation of heat (Joule/gram) in dependence on time. Whereas for ToniCAL cement a quantity of 10 grams is sufficient due to the homogeneous, pulverized materials, ToniCAL mortar needs a quantity of about 70 to 140g and ToniCAL concrete finally works - due to the very coarsegrained and very inhomogeneous | | fresh concrete mixture - with a specimen shape and quantity that corresponds to a concrete cylinder with a diameter of 150 mm and a height of 300 mm (about 5.3 litres). Each one of the devices consists of a control unit with industrial temperature controller, amplifier, temperature display and processor interface as well as a separate, heat-insulated calorimeter block containing the measuring cylinders for the material to be tested and an inert sample, the measuring chains from a variety of thermosensors adjacent to the cylinders and a source of heat. ToniCAL cement is additionally equipped with a device for the subsequent dosing of additives. The released hydration heat (Joule/mass x time) can be represented in tabular form or graphically as instantaneous or cumulative value either during the measurement or after the termination of the test. The high measuring accuracy and reproducibility guarantee a safe and reliable evaluation of the generation of heat and of the influence of additives. | | |