Fig. 9.
Results from drained triaxial shearing tests at effective confining pressures of 100, 200 and 300 kPa performed on LBS at an axial displacement rate of 1 mm/h (tests 1–9 and 12–15): (a) average AE rate (RDC/min) measured at volume minimum (i.e. transition from contractive to dilative behaviour) and average AE rate (RDC/min) measured after mobilisation of post-peak shear strength at 20% shear strain; (b) differences between the average AE rates measured at volume minimum and post-peak Refer to the image caption for details.

Results from drained triaxial shearing tests at effective confining pressures of 100, 200 and 300 kPa performed on LBS at an axial displacement rate of 1 mm/h (tests 1–9 and 12–15): (a) average AE rate (RDC/min) measured at volume minimum (i.e. transition from contractive to dilative behaviour) and average AE rate (RDC/min) measured after mobilisation of post-peak shear strength at 20% shear strain; (b) differences between the average AE rates measured at volume minimum and post-peak

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