Rock joints originate from geological failures occurring when a break in the rock mass continuity along with no visible displacement has occurred. From a rock mechanics point of view, the discontinuities are characterized by a lower mechanical strength than the original rock matrix and require the following detailed test investigations:
• shear strength of the joint performed with the rock shear box apparatus;
• tilt test performed with the tilt test apparatus;
• surface roughness of the joint performed with the profilometer (Barton comb).
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Joint Roughness Coefficient Test DeviceThe Joint Roughness Coefficient Test Device is used to calculate the JRC of a rock or joint.
Profilometers (Barton Comb)Used for measurement of the roughness profile of rock samples.
Rock Shear Box ApparatusThe Rock Shear Box Apparatus is used for determining the strength and slope stability of rock.