lab2 - EXPERIMENT #2: SIEVE ANALYSIS AND ATTERBERG LIMITS...

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EXPERIMENT #2: SIEVE ANALYSIS AND ATTERBERG LIMITS Lab Report Prepared By: Kristin A. Norville and Gino Liu Partners: Kristin Norville, Gino Liu, Zach Barrett, Thomas Rice CE 383: Geotechnical Engineering I September 14, 2005 1
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PROCEDURE: Atterberg Limits (Liquid Limit): The fall of the casagrande cup is first calibrated to be 10mm. While keeping the soil leveled and no more than half an inch deep, a groove is then cut in the center with ASTM standard tool. When the number of blows required to close a distance of 0.5 inch is consistent within one blow, three samples of soil ranging from 15 to 35 blows for the gap to close are weighed once when wet, and once another when oven dried for 24 hours. These numbers are then used to calculate the liquid limit. Plastic Limit: About 10 grams of soil is rolled on a glass plate to obtain a strand with 1/8 inch diameter. Its moisture content is adjusted until the strand shows signs of crumbling. By obtaining three samples of the soils weights when wet and dry, the soil’s plasticity can be determined. Sieve Analysis : A representative oven-dried soil sample is weighed to the nearest 0.1 gram. Sieve number 4, 10, 20, 40, 60, 140, 200 and the bottom pan are weighed while empty. After placing the sample on the top of the stacked sieves and being shook for 5 minutes in the shaker, the mass of each sieve
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lab2 - EXPERIMENT #2: SIEVE ANALYSIS AND ATTERBERG LIMITS...

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