Crushed salt compaction - a new approach for lab test analysis, physical modelling and numerical simulation Part 1: Development and validation

Impact of the Compaction Behavior of Crushed Salt on The Thermo-Hydro-Mechanical Response of a Generic Salt Repository For Heat-Generating Nuclear Waste

“…A new constitutive model, EXPO-COM, for the compaction behavior of crushed salt is currently under development at the Chair of Geomechanics and Multiphysics Systems at TUC. It incorporates the effects of different influencing factors, including temperature and water content, and is based on new lab tests from an extensive systematical lab program, which has been designed and (partially) performed with some innovative loading conditions in the framework of the joint projects KOMPASS-I and KOMPASS-II (Düsterloh et al, 2022a(Düsterloh et al, , 2022b. These loading conditions have been designed to isolate the individual influencing factors on the compaction behavior of crushed salt within triaxial lab tests.…”

“…Two triaxial long-term tests were chosen to show the similarities and the differences between the two model versions C-WIPP and C-WIPP/ TUC and to distinguish the advantages of the C-WIPP/TUC model. The detailed description of these tests can be found in the final report of KOMPASS-I project (Czaikowski et al, 2020); the analysis of the information, that can be derived from these tests for the development or for the validation of a constitutive model, can be found in Düsterloh et al (2022b).…”

Compaction of crushed salt for safe containment – a summary of the KOMPASS projects

“…The efforts to improve the prediction of crushed-salt compaction begun during the first phase of the KOMPASS projects (Czaikowski et al, 2020) and were followed up in a second phase ending in June 2023. The primary achievements of the projects are as follows (Czaikowski et al, 2020;Friedenberg et al, 2022):specification of the KOMPASS reference material, an easily available and reproducible synthetic crushedsalt material, for generic investigations;development of pre-compaction methods and successful production of samples in the short term and under in situ loading conditions;formulation of an extended laboratory program addressing the isolated investigation of known relevant factors influencing the compaction behavior of crushed salt (Düsterloh et al, 2022);…”

“…formulation of an extended laboratory program addressing the isolated investigation of known relevant factors influencing the compaction behavior of crushed salt (Düsterloh et al, 2022);…”