Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 2.7P
The particle characteristics of a soil are given below. Draw the particle-size distribution curve and find the percentages of gravel, sand, silt, and clay according to the MIT system (Table 2.3).
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Calculate the particle density of a soil using the following values;a. Weight of the flask= 40 g b. Volume of the flask= 50 ccc. Weight of dry soil= 15 gd. Weight of flask+soil+water= 96 g
a.1.67
b.1.65
c.1.63
d.1.60
QUESTION 2 a. The results given in Table 1 were obtained in a particle size distribution test for soil sample received in the laboratory. Table 1 US Sieve No. Size Opening(mm) Weight Retained(g) 4 4.75 0 10 2.0 18.5 20 0.85 53.2 40 0.425 90.5 60 0.25 81.8 100 0.150 92.2 200 0.075 58.5 Pan - 26.5i. Determine the percentage passing each sieve and plot the particle size distribution curve. ii. How much fine-grained soils are in the sample ? iii. Determine the amount of gravel and sand in the sample ? iv. Determine D10, D30, and D60 from the grain-size distribution curve. v. Calculate the uniformity coefficient, Cu. vi. Calculate the coefficient of gradation, Cc. vii. Describe the gradation curve (eg poorly graded)
A soil has a water content of 25 %, a void ratio of 0.7, and a specific gravity of solids of 2.7.
(a) On the phase diagram shown below, choose the total volume to be equal to one, and fill up all other quantities. Use Kg for mass and m3 for volume.
Use the phase diagram to calculate the following quantities.
(i) total density
(ii) dry density
(iii) degree of saturation
(iv) saturated density (assume no volume change)
Chapter 2 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 2 - Prob. 2.1PCh. 2 - Following are the results of a sieve analysis: a....Ch. 2 - For a soil, given: D10 = 0.08 mm D30 = 0.22 mm D60...Ch. 2 - For a soil, given: D10 = 0.08 mm D30 = 0.22 mm D60...Ch. 2 - Repeat Problem 2.2 with the following results of a...Ch. 2 - Repeat Problem 2.2 with the following results of a...Ch. 2 - The particle characteristics of a soil are given...Ch. 2 - Redo Problem 2.7 according to the USDA system...Ch. 2 - Redo Problem 2.7 according to the AASHTO system...Ch. 2 - In a hydrometer test, the results are as follows:...
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- The grain-size characteristics of a soil are given in the following table. a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt, and clay according to the MIT system. c. Repeat Part b using the USDA system. d. Repeat Part b using the AASHTO system.arrow_forwardRedo Problem 2.7 according to the USDA system (Table 2.3). 2.7 The particle characteristics of a soil are given below. Draw the particle-size distribution curve and find the percentages of gravel, sand, silt, and clay according to the MIT system (Table 2.3).arrow_forwardRedo Problem 2.7 according to the AASHTO system (Table 2.3). 2.7 The particle characteristics of a soil are given below. Draw the particle-size distribution curve and find the percentages of gravel, sand, silt, and clay according to the MIT system (Table 2.3).arrow_forward
- Repeat Problem 2.11 with the following data. 2.11 The grain-size characteristics of a soil are given in the following table. a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt, and clay according to the MIT system. c. Repeat Part b using the USDA system. d. Repeat Part b using the AASHTO system.arrow_forwardAssuming a relative density of soil solids of 2.20, find the dry density (ρD in kg/m3) of a saturated sample at a water content of 15%.Assume the volume of the soil solids to be 1 m3. Keep your calculations to 3 decimal places, however, write your answer as a whole number.arrow_forwardPlease give me right solution Soil mechanics A group of particles is described by the log-normal distribution with Dmean by weight =5 micrograms and the variance is 0.8. What fraction by weight of the particles have diameters less than 1 microgram? What fraction by number of particles have diameters less than 1 microgram?arrow_forward
- 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 82 20 0.850 65 40 0.425 36 60 0.250 22 100 0.150 14 200 0.075 5 Pan --- 0 Determine the value of the coefficient of uniformity.arrow_forwardDetermine the percentage of sand, silt and clay using the MIT soil classification system from the figure below.arrow_forwardThe Unit weight of a soil sample is 19. 6 Kilo-Newton per cubic meter. Calculate the following: a. Convert the unit in pcf (Pounds per cubic feet). b. Density in pcf (pounds per cubic feet). c. If the soil has a mass of 3 slugs, determine the volume of the soil in cubic feet.arrow_forward
- The mass of a dried soil sample is 250 g, as determined on a laboratory balance (scale). When immersed in water, the soil particles displace 95 cm3, and this is then the volume of soil solids. Using this data, determine the specific gravity of soil solids.arrow_forwardVolume by immersion vs. volume by measurement Provide a comparison about the two methods on how to determine the unit weight of the soil; their advantages and disadvantages.arrow_forwardDetermine the percentage of Clays based on AASHTO Soil classification system for the grain-size characteristics of a soil are given as follows: Round off your answer to two (2) decimal places. Size (mm) Percent Finer 0.850 100.00 0.425 92.10 0.250 85.80 0.150 77.30 0.075 62.00 0.040 50.80 0.020 41.00 0.010 34.30 0.006 29.00 0.002 23.00arrow_forward
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