The table below shows soil sieve analysis data. A hydrometer analysis performed in accordance with AASHTO...
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The table below shows soil sieve analysis data. A hydrometer analysis performed in accordance with AASHTO T88 was used on the portion of the material passing the #40 sieve for Soil A as shown in the second table. The composite correction was 2.5 g/L and the tests were performed at 17°C where the specific gravity of the soil was 2.68. In a similar analysis for Soil B, 2% of the fines pass 0.005 mm. Plot the gradation curve for both soils on the same graph, determine the percentage of fines, proportion of clays and silts in each, and calculate the uniformity coefficient and the coefficient of curvature. Describe the soils (well-graded etc.) based on these results. A B Sample #4 200 g 194 g Time (min) 2 152H (g/L) 57 09 Og 5 51 # 10 20.2 g 48.2 g 15 44 # 20 25.7 g 19.6 g 30 38 #40 40.4 g 60.3 g 60 33 #100 18.1 g 37.2 g 250 27 #200 27.2 g 22.1 g 1440 22 PAN 68.2 g 5.6 g A) Explain why it is preferable to plot particle size distribution on semi-log paper rather than grid paper? B) If you used grid paper (arithmetical plot), would the curves be comparable? In other words, would you get the same Cu and Cc? Explain or prove your answer. The table below shows soil sieve analysis data. A hydrometer analysis performed in accordance with AASHTO T88 was used on the portion of the material passing the #40 sieve for Soil A as shown in the second table. The composite correction was 2.5 g/L and the tests were performed at 17°C where the specific gravity of the soil was 2.68. In a similar analysis for Soil B, 2% of the fines pass 0.005 mm. Plot the gradation curve for both soils on the same graph, determine the percentage of fines, proportion of clays and silts in each, and calculate the uniformity coefficient and the coefficient of curvature. Describe the soils (well-graded etc.) based on these results. A B Sample #4 200 g 194 g Time (min) 2 152H (g/L) 57 09 Og 5 51 # 10 20.2 g 48.2 g 15 44 # 20 25.7 g 19.6 g 30 38 #40 40.4 g 60.3 g 60 33 #100 18.1 g 37.2 g 250 27 #200 27.2 g 22.1 g 1440 22 PAN 68.2 g 5.6 g A) Explain why it is preferable to plot particle size distribution on semi-log paper rather than grid paper? B) If you used grid paper (arithmetical plot), would the curves be comparable? In other words, would you get the same Cu and Cc? Explain or prove your answer.
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Here are the steps to solve this problem 1 Plot the gradation curves for Soils A and B on semilog gr... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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