Resistance test kit VT12

frictionmanualfor soil

The test can be carried out either in the field, on the wall or at the bottom of an excavation, or even in a laboratory on a suitably contained specimen. It consists of inserting a vane with four orthogonal blades into the soil, rotating it at the prescribed speed, to measure the value of the torque required to break the soil, by means of the calibrated torque wrench. Afterwards the residual shear strength of the soil after significant deformation can be measured by continuing to rotate the vane several turns until the soil is completely mixed. Technical information The vanes have a rectangular shape and a height double their diameter. A thin enlarging ring can be installed above the blades of the vane so that most of the resistance due to the soil friction along the path of the rod inserted into the soil is eliminated from the measurements.