Über den Abbindeprozess des Sorelzements im Steinholz
article
The setting of magnesium oxychloride cement is investigated using data from a large-scale experimental study of various flooring composition. From the initial water content and the loss in weight before a stable weight is reached, a characteristic hydration number H is calculated for each one of eight test pieces corresponding to the eight fooring compositions. It is found that H approaches its theoretical value 8 (valid for magnesium hydroxychlorides) in most cases. Strong discrepancies for some compositions are related to abnormal sensitivity for variations in atmospheric humidity, to an abnormal setting process as shown by X-ray diffraction, and also to abnorrnal behaviour of the experimental floorings. These effects can be explained on the assumption that a MgCl-solution, absorbed in the filler, is present in these abnormal cements after the primary setting (chemica! combination of all MgO with the solution) is finished. The importance of using compositions with a sufficient quantity ofMgO in order to prevent such a result is stressed.
TNO Identifier
973456
Source
Schweizer Archiv, pp. 326-330.
Collation
5 p.
Pages
326-330
Files
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