ABSTRACT
In the end, the decisive properties of the crushed salt are its porosity and permeability because of their influence on hydraulic processes should brine enter the repository. The porosity of the crushed salt is reduced by the convergent deformation of the surrounding salt rock as a response to the formation stresses. However, because the in-situ convergence rate is quite low (<10−10 s−1) and exceedingly time-consuming if reproduced in laboratory tests there still remains some uncertainty in the knowledge about long-term compaction behaviour of crushed salt, particularly in the range of porosities of less than 10%.
