VANE TEST (Features

The Reel esay or Vane Test is used to determine the undrained shear strength "in situ" of clays and silts soft to firm consistency at regular intervals. The test could be performed in the bottom of a running survey (Vane Test) or from theground surface mediane the driving of the palette with the static penetrometer (VaneBorer).

It consists of the driving field in a pinwheel (Vane Test) consists of four rectangular bladesthin steel sheet, orthogonal to each other and supportive of a linkage and measure the torque T to rotate the device to break ground. the height (H) of the blades is twice itsdiameter (D)

The Vane Test trapezoidal commonly used are 130 x 65 mm dimensions. In this case thevane constant (K) is 1 kPa / Nm and the usual resistance range to be measured is 0 - 100kPa. The team has a special nipple connection between the reel and rod, so that you can measure the friction of the nipple and rods.

The torque is applied by an electric motor that regulates the speed of the trial. Using asensor and A / D test is the monitored in real time on a PC. The test procedure is contained in Vane Test ASTM D-2573.