. The effect of varying the parameters of vane shear tests on marine sediments. . 0 10 20 30 Rate of Rotation of Vane (RPH) The curve shows the value of shear strength for turning rates of 1 and 2 RPH to be essentially equal, but the value of shear strength increases with rates exceeding 2 RPH. Turning rates of 1 and 2 RPH are currently employed in vane shear tests. Both of these rates give valid results of shear strength, but any higher speeds of rotation would give erroneously high values. 62

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