| Summary: | Consolidation tests have been performed to determine the mechanical properties of crushed salt as affected by applied
stresses and consolidation period. The crushed salt with particle sizes ranging from 0.075 to 4.76 mm mixed with 5% saturated
brine are consolidated under axial stresses ranging from 2.5 to 10 MPa. The consolidation curves show instantaneous and
transient creep strains. Densities, uniaxial compressive strengths and elastic moduli measured after consolidation for 3 to 180
days increase with the applied stresses and duration due to the particle rearrangement and recrystallization. The crushed salt
properties are calculated as a function of mean strain energy required during consolidation. The opening depth and the time at
which the crushed salt backfill is installed are significant factors controlling its long-term density, strength and stiffness.
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