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.
•Axial displacement–time and porosity–time relation in the creep experiments.•Axial displacement and porosity are effected by fragment size and loadings.•Creep mechanisms include fragment crushing, splitting and rearrangement.•Abrupt changes in axial displacement are observed in the steady state creeps.•Formation of shear zone is the possible mechanism of the abrupt changes.