Equation of equilibrium line can be written as y = mX m=slope of equilibrium line = 0.15/0.25 = 0.6 y = 0.6X Material balance of solute gives L (0.25 − 0.05) = Gmin [0.6 (0.25)] Here, L = 3mol / sec, G = minimum flow rate of pure steam
Shear parameters ‘c’ and ∅ are dependent of water content of soil
• Vane shear test is a useful method of measuring the shear strength of clay. It is a cheaper and quicker method. The test can also be conducted in the laboratory.
• The laboratory vane shear test for the measurement of shear strength of cohesive soils, is useful for soils of low shear strength (less than 0.3 kg/cm2) for which triaxial or unconfined tests cannot be performed.
• The test gives the undrained strength of the soil. The undisturbed and remoulded strength obtained are useful for evaluating the sensitivity of soil.
NOTE: This test is also useful when the soil is soft and its water content is nearer to the liquid limit.