Lab # 1, Calculations

# Lab # 1, Calculations - 2 Particle Size Analysis-The...

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Particle Size Analysis 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 Sieve size (mm) % passing 2- Particle Size Analysis: -The following Data is obtained from the Mechanical Analysis of Soil in the Laboratory. In addition using the following formulas we obtained the percentage Retained, Cumulative Retained and the percentage passing. - % Retained= (Mass Retained (gms) / ∑ mass of soil (gms)) × 100 % - %Passing = 100 - ∑ % retained, = 100 - ∑Cumulative % retained Sieve No. Sieve size (mm) Mass Retained (g) % Retained Cumulative % Retained % passing 4 4.75 42.5 6.6 6.6 93.4 8 2.36 224.5 35 41.6 58.4 16 1.18 145.5 22.7 64.3 35.7 30 0.6 89.5 14 78.3 21.7 50 0.3 61 9.5 87.8 12.2 100 0.15 40 6.2 94 6 200 0.075 31.5 5 99 1 Pan 6.5 1 100 0 ∑= 641 Using Excel, we graph the Percentage passing against the Sieve Size (mm):

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-From the Graph we obtain the following Data: D10= 0.22 D30= 0.95 D60= 2.5 -Cu (Co-efficient of uniformity) = (D60/D10) Cu= (2.5/0.22) = 11.36 -Cc (Co-efficient of curvature) = ((D30²)/ (D60×D10))
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## This note was uploaded on 01/24/2012 for the course ECON 101 taught by Professor Dezhbakhsh during the Spring '07 term at Emory.

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Lab # 1, Calculations - 2 Particle Size Analysis-The...

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