Solution to Assignment 2 (1) - Department of Civil...

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Department of Civil Engineering. Amin Rafiei North Carolina State University. CE342: Geotechnical Engg. Solution to Assignment-2 A_3_ Soil Properties: Grain Size Distribution, Classification & Mineralogy Solution to Problem 1. Sieve Size(mm) 4.75 2 0.84 0.25 0.074 PAN Weight Retained 3.1 5.8 3.8 2.6 6.8 2.1 Finer(%) 87.19008 63.22314 47.52066116 36.77686 8.677686 0
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Department of Civil Engineering. Amin Rafiei North Carolina State University. CE342: Geotechnical Engg. Percentage of Gravel Content = 100 F 4 = 100 87.19 = 12.81% Percentage of Sand Content = F 4 F 200 = 87.19-8.67 = 78.52% Percentage of Silt and Clay Content = F 200 = 8.67%
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Department of Civil Engineering. Amin Rafiei North Carolina State University. CE342: Geotechnical Engg. Solution to Problem 2.(1.12) Results from hydrometer tests (percentages) are based on fine grained section of the soils. For Example : % fine grained soil in soil A = 33.65% % finer than 0.05 mm in soil A = 22.6% * 33.65% = 7.6% (a) Sieve Number #4 #10 #20 #40 #100 #200 Hydrometer Test Results Sieve Size(mm) 4.75 2 0.85 0.425 0.15 0.075 0.05 0.01 0.005 0.002 Weight Retained-Soil A 0 20.2 25.7 60.4 98.1 127.2 Finer(%)-Soil A 100 95.9584 90.8163 78.7315 59.1036 33.6535 0.07606 0.0464 0.0411 0.0168 Weight Retained-Soil B 0 48.1 219.5 67.3 137.2 22.1 Finer(%)-Soil B 100 90.3762 46.4586 32.9932 5.54222 1.12045 0.00253 0.0015 0.0014 0.0006
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Department of Civil Engineering.
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