The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The dependence on frequency of the damping maximum of hardened cement paste (hcp) in the region of -90°C has been analysed in a frequency range between 1 kHz.and 9 kHz. The bending vibration of an hcp beam has been induced and the eigenfrequency and damping measured. After the Arrhenius-equation the activation energy was calculated. The dispersion of the eigenfrequency and the damping maximum at the same temperature indicate a mechanical relaxation process. It can be attributed to interaction between the pore ice and the internal solid surface of hcp.