The VJ Tech Bromhead Motorised Ring Shear is a torsional ring shear apparatus, which produces accurate and repeatable test results to determine the residual shear strength of cohesive soils under drained conditions.

The Instrument is supplied as a tabletop unit for stability and a normal load is applied to the annular ring sample through a stepper motor whilst rotational shear displacement is applied to the sample by a separate stepper motor, through a fixed ratio gearbox. Shear stress is determined by a pair of load cells which provide accurate measurement of the top cap’s resistance to the rotation.

This type of Bromhead Motorised Ring Shear apparatus is widely used to determine the residual strength of soils as well as the interface residual friction angles between soils and piles. The ring-shaped soil specimens have a height of 5 mm. Tests are easily conducted; specimens are simple to form, and both soil-soil and soil-steel interface tests can be carried out with our Advanced csRING-SSI software module.