fig: Liquid limit device


– Liquid limit device is used for the determining the liquid limit.

– Take a soil sample passing through the sieve of 0.425 mm sieve. Make a paste of soil.

– Place it on the metal brass  cup of liquid limit device and level horizontally using knife or spatula.

– Divide the soil into two portion using grooving tool.

– Rotate the liquid limit device at the rate of 2 revolution per second.

– Record the number of blows to close the bottom of groove through a distance of 13 mm.

– Determine the water content using Oven Drying Method.

–  Water content at 25 no. of blows is taken as liquid limit device.

– Test should be done for at least 4 times.

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