For particle size distribution curve for a soil sample D60 is to be 0.42 and D30 is to be 0.045 and D10 is to be 0.005 (For these values find Cu, Cc below) Particle Size Distribution Curve 100 90 70 60 50 20 10 100 10 0.1 0.01 0.001 Particle Size D, mm Cu is equals to: Cc is equals to: Is the soil sample given in the figure above (values are indicated in the figure) Well graded: insert 1 0.0016 0.045 mm +0.224 mm Percent Finer, S, %
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- 5. The following information is obtained from a sieve analysis to determine the range of particle sizes in a granular soil sample. Sieve Size Sieve Opening (4.76) Percent Finer#4 4.76 96#10 2.00 80#20 0.84 51#40 0.42 38#60 0.25 25#100 0.149 12#200 0.074 5 Present the information as grain-size curve on semi-logarithmic coordinates of percent finer against particle size diameter. From the plot, determine the uniformity coefficient Cu.The grain size curve for soil sample is shown. 100 90 80 70 60 50 40 30 20 10 10 0.1 0.01 Particle Size, mm. What is the effective grain size of the soil? Percent Finer,5. The following information is obtained from a sieve analysis to determine the range of particle sizes in a granular soil sample. Sieve Size Sieve Opening (4.76) Percent Finer # 4 4.76 96 #10 2.00 80 #20 0.84 51 # 40 0.42 38 #60 0.25 25 #100 0.149 12 #200 0.074 Present the information as grain-size curve on semi-logarithmic coordinates of percent finer against particle size diameter. From the plot, determine the uniformity coefficient Cu.
- Problem 2 A sample was shaken through a nest of sieves and the results are obtained. The initial soil mass of the soil sample is 500g. Draw the particle size distribution curves and interpret the graph. Mass Retained Sieve No. Diameter (mm) (gram) 4 4.75 0 10 2.00 40.2 20 0.85 84.6 30 0.6 50.2 40 0.425 40.0 60 0.25 106.4 140 0.106 108.8 200 0.075 59.4 Pan 8.7 Determine the: 6. Percentage Loss in Soil Mass 7. Particle Size (%Gravel, % Sand, % Silt and %Clay) according to USCS 8. Effective Grain Size (D10) 9. Coefficient of Uniformity (Cu) 10. Coefficient of Curvature/Gradient (Cc)a. determine the effective size D10 b. determine the coefficient of curvature A sample of dry coarse-grained material was taken through a layer of sieves and the following results were obtained. Make the necessary calculations and draw the particle distribution curve. Mass of soil Sieve No. Opening (mm) retained (g) 4 4.75 10 2.00 40 20 0.85 60 40 0.425 89 60 0.250 140 80 0.180 122 100 0.150 210 200 0.075 56 Pan 12Given below is the result of a sieve analysis done on a soil sample.Sieve No. Diameter Percent Passing %4 4.750 9510 2.000 8220 0.850 7340 0.425 5360 0.250 23100 0.150 14200 0.075 7Pan --- 0Determine the value of the coefficient of uniformity
- . Given: H1 = Poisson's ratio of soil sample 1 Hz = Poisson's ratio of soil sample 2 coefficient of earth pressure at rest %3D %3D k1 for soil sample 1 k2 = coefficient of earth pressure at rest for soil sample 2 If H/42 then the value of k;/k2 will be %3D %3D = 1.5 and (1-µj)/(1-µ2) = 0.875, %3D %3D1. From the given soil samples below, (a) compute the effective size, uniformity coefficient, and coefficient of gradation (b) Determine the percent of gravel, sand, silt and clay of soil A using AASHTO Sieve size. 0.425 0.033 0.018 0.01 0.0062 0.0035 0.0018 0.001 Soil A Passing Finer (%) 100 90 80 70 60 50 40 358. 200 grams of a soil sample has a grain size distribution as shown in the table below with a liquid limit of 32% and plastic limit of 15%. Particle Size (mm) 4.75 Retained (grams) 12 Classify the soil using the Unified Soil Classification System. 2.36 15 1.3 13 0.6 28 0.2 20 0.075 2
- II. The grain size curve for soil sample is shown. 100 90 80 70 60 50 40 30 20 10 0 10 4. 5. 6. 1 Particle Size, mm. What is the effective grain size of the soil? What is the value of D60? 0.1 What is the value of the Coefficient of Gradation? 7. What is the value of the Coefficient of Uniformity? 8. What is the value of the Sorting Coefficient? Percent Finer, % 0.01Q2) An air dry soil sample weighting 2000g is brought to the soil laboratory for sieve analysis , the laboratory data as follows. U.s>sieve No. Sieve opening (mm) Weight training (g) 4 4.75 466 10 2.00 608 40 0.425 652 100 0.150 224 200 0.074 42 pan 8 Plot the grain size distribution curve and name the class of soilThe grain-size characteristics of soil re given in the following table. Use Table 2.3 for the analysis. Size (mm) Percent finer 0.425 100 0.1 79 0.04 57 0.02 48 0.01 40 0.002 35 0.001 33 Table 2.3 Particle-Size Classifications Grain size (mm) Name of organization Gravel Sand Silt Clay Massachusetts Institute of Technology (MIT) >2 2 to 0.06 0.06 to 0.002 2 <0.002 76.2 to 2 2 to 0.075 0.075 to 0.002 <0.002 Fines (i.e., silts and clays) <0.075 76.2 to 4.75 4.75 to 0.075 Note: Sieve openings of 4.75 mm are found on a U.S. No. 4 sieve; 2-mm openings on a U.S. No. 10 sieve; 0.075-mm openings on a U.S. No. 200 sieve. See Table 2.5. i.) What is the percentages of gravel, sand, silt and clay according to the MIT system. a.) Gravel – 0%; Sand – 38%; Silt – 30%; Clay – 35% b.) Gravel – 0%; Sand – 37%; Silt – 30%; Clay – 35% c.) Gravel – 0%; Sand – 36%; Silt – 30%; Clay – 35% d.) Gravel – 0%; Sand – 35%; Silt – 30%; Clay – 35% e.) None of the above