Field Vane Tester
The field vane test is an in situ test and it is carried out with a rectangular vane, consisting of four plates fixed at 90 ° angles to each other, pushed into the soil to the desired depth and rotated.
The field vane test used in soft and very soft cohesive soils for the determination of the undrained shear strength and the sensitivity of the soil. Field vane test may also be used for the determination of the undrained shear strength in stiff clays, silts and clay till. The reliability of test results varies depending on the type of soil.