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 12

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 12

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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)
Given below is the result of a sieve analysis done on a soil sample. Sieve No. Diameter Percent Passing % 4 4.750 95 10 2.000 89 20 0.850 71 40 0.425 47 60 0.250 21 100 0.150 14 200 0.075 7 Pan --- 0 Determine the value of the coefficient of uniformity. Round off to three decimal places.
Find the Cu of the given sample. identify the answer in this choices. Weight Percentage Cumulative Percentage Sieve retained finer S.NO Weight retained (gm) percentage retained (C)N = (100 - C) Select one: size (gm) {W,/ W,}x 100 O a. 8.98 1 75mm 100 O b. 18.33 63mm 100 О с. 2.92 3 50mm 100 O d. 6.22 4 37.5mm 454 22.7 22.7 77.30 28mm 285 14.25 36.95 63.05 20mm 207 10.35 47.30 52.70 7 14mm 318 15.90 63.20 36.80 8 10mm 206 10.30 73.50 26.50 9 6.3mm 118 5.90 79.40 20.60 10 5.0mm 102 5.10 84.50 15.50 11 3.35mm 64 3.20 87.70 12.30 12 2.0mm 88 4.40 92.10 7.90 13 1.18mm 35 1.75 93.85 6.15 14 600µ 42 2.10 95.15 4.85 15 300µ 33 1.65 97.60 2.40 16 150µ 18 0.90 98.50 1.50 17 75µ 22 1.10 99.6 0.40 18 Pan 8 0.40 100 In the pan we have = 100 W,= 2000 -99.6 = 0.4 % of material 2. 5.
A series of direct shear tests were conducted on a sample of soil in a 60 mm square shear box. The table below shows the results that were obtained at failure. Plot the graph of shear stress at failure against normal stress anddetermine the strength parameters of the soil. Normal Load (N) 200 300 400 Shear Load (N) 105 142 180
Attempt 10 The weight percent of silicon in six different rock samples, each containing different amounts of silicon, was measured different methods. The results are given in the table. two Sample Method A Si wt% Method B Si wt% 1 11.570 11.550 2 15.380 15.290 3 17.950 17.830 4 22.840 22.810 5 25.110 25.170 6 27.070 27.030 Determine feale- 0.300 feale Incorrect Determine fuable at the 95% confidence level. A list of r values can be found in the Student's r table.
In Triaxial test, which of the following parameters do not need to be recorded the confining pressure specimen diameter changes ) the generated pore pressure the axial force A Triaxial test was performed on a dry, cohesionless soil. If the sample failed vhen the minor principal stress was half of the major principal stress, the soil's angle of internal friction is: O 22.5 19.5 33.3 O 25 A technician obtained a soil void ratio of 1.5. It is okay because it is possible to measure void ratio values above 1. True False |
Given below is the result of a sieve analysis done on a soil sample. Percent Passing % 96 83 67 46 Sieve No. 4 10 20 40 60 100 200 Pan Diameter 4.750 2.000 0.850 0.425 0.250 0.150 0.075 26 13 8 0 Determine the value of the coefficient of uniformity.
Q# 2. The following are the results of a consolidation test on a sample of a clayey soil Pressure, o' (kN/m²) 1.116 25 1.108 50 1.055 100 0.962 200 0.845 400 0.755 800 0.65 1600 0.658 800 0.675 400 0.685 200 a Plot the e, log o' curve. b. Using Casagrande's method, determine the pretonsolidation pressure. Calculate the compression index, C, and the ratio of C/C. C. (Note: Use excel for calculation and drawing. Discuss the details in your own words.)
Given below is the result of a sieve analysis done on a soil sample. Sieve No. Diameter Percent Passing % 4 4.750 95 10 2.000 83 20 0.850 69 40 0.425 50 60 0.250 27 100 0.150 13 200 0.075 7 Pan --- 0 Determine the value of the coefficient of uniformity. ROUND OFF TO THREE DECIMAL PLACES. USE STORED VALUES.
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.
Given below is the result of a sieve analysis done on a soil sample. Sieve No. Diameter Percent Passing % 4 4.750 97 10 2.000 82 20 0.850 71 40 0.425 42 60 0.250 27 100 0.150 13 200 0.075 8 Pan --- 0 Determine the value of the coefficient of gradation/curvature. Round off to three decimal places.
A pressure force of P = 75 kN is applied to the rectangular prism shaped test sample with dimensions a = 20 mm, b = 30 mm, c = 20 mm, within the limits of proportionality. After loading, the measured changes in sample dimensions are Aa = -0.012 mm, Ab = 0.005 mm. Calculate the normal stress (o,) on the prism. Calculate the transverse strain (ɛz) and the longitudinal strain (ɛy). Calculate the Poisson's ratio (v) and the modulus of elasticity (E) of the material. Calculate the change in length (Ac), along the x -axis. SOLUTION