The 'coefficient of permeability' k can be measured in lab by:
Choose the correct answer
Only the vane shear test
Constant head test (coarse soils) or falling head test (fine soils) in lab permeameter
Standard Proctor test
CBR test
Correct Answer
B. Constant head test (coarse soils) or falling head test (fine soils) in lab permeameter
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Lab tests: (1) Constant head test (IS 2720 Part 17): for coarse sands and gravels — k = QL/(Aht). (2) Falling head test (IS 2720 Part 17): for silts and fine sands — k = aL/(At) × ln(h1/h2). Field: pumping test from wells (most reliable for aquifer k). Permeameter tests are for disturbed samples.
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