Cassagrande Test

May 2nd, 2015
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DETERMINATION OF LIQUID LIMIT- BY CASAGRANDE APPARATUS STANDARD Liquid Limit is defined as the water content at which the soil changes from liquid state to plastic state.

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cassagrande testDETERMINATION OF LIQUID LIMIT- BY CASAGRANDE APPARATUSSTANDARDIS: 2720 (Part 5) 1985.DEFINITIONLiquid Limit is defined as the water content at which the soil changes from liquid state to plastic state.APPARATUSCasagrande apparatus confirming to IS: 9259-1979.Grooving tool.Balance of capacity 500 grams and sensitivity 0.01gram.Thermostatically controlled oven with capacity up to 2500 C.Porcelain evaporating dish about 12 to 15cm in diameter.Spatula flexible with blade about 8cm long and 2cm wide.Palette knives with the blade about 20cm long and 3cm wide.Wash bottle or beaker containing distilled water.Containers airtight and non- corrodible for determination of moisture content.PROCEDURETake representative soil sample of approximately 120gms passing through 425 micron IS sieve and mix thoroughly with distilled water in the evaporating dish to a uniform paste.The paste shall have a consistency that will require 30 to 35 drops of the cup to cause the required closure of the standard groove.Fig: 2.6.1 Liquid Limit test.Leave the soil paste to stand for 24 hours to ensure uniform distribution of moisture through out the soil mass.Remix the soil thoroughly before the test.Place a portion of the paste in the cup above the spot where the cup rests on the base, squeeze down and spread i

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