Matest Laboratory Vane Apparatus

The Matest Laboratory Vane apparatus offers a swift method for estimating the undrained shear strength of soil specimens, serving as an alternative to standard triaxial equipment. This apparatus, based on the original UK Transport Research Laboratory design, applies stress to the soil sample based on the calibration spring and vane chosen. The selection of the spring and vane depends on the anticipated soil strength, with larger vanes suitable for soils with low-strength values. The apparatus operates by rotating the vane into the soil sample, and the calibrated spring measures the applied torque.

The instrument features two graduated scales for applied torque (inner scale) and vane rotation (outer scale).
After the test, the Undrained Shear Strength (cu) is calculated by dividing the applied Torque (T) by a constant (K) determined by the dimensions and shape of the chosen vane.
The vane apparatus comes complete with four calibrated springs and a vane Ø 12.7 x 12.7 mm.

Dimensions: 250x300x600 mm
Weight: 11 kg approx.