Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 4, Problem 4.5P
To determine
Describe the soils A, B, C, and D and give their USCS symbols.
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Question 4
Classify the following soils using the Unified soil classification system. Give group symbols and group names.
% Passing No. 4: 99
% Passing No. 200: 76
LL = 60
PL = 32
%3D
Group Symbol: Blank 1
Group name: Blank 2
Blank 1
Add your answer
Blank 2
Add your answer
Problem 3:
The grin-size distribution curves for three different sands (A, B, and C) are shown in the figure below.
a. Determine the uniformity coefficient and the coefficient of gradation for each soil.
b. Identify if the soils are well graded or poorly graded based on Part a.
Percent finer
100
80
60
40
20
0
100
10
ABC
1
Grain size (mm)
1
0.1
0.01
Question 5
The sieve analysis of soil and the liquid and plastic
limits of the fraction passing through the No. 40 sieve
are given below. Classify the soils using the AASHTO
classification system and give the group indexes.
% Passing No. 10: 98
% Passing No. 40: 80
% Passing No. 200: 50
LL = 38
%3D
PL = 29
Group classification: Blank 1
Group index: Blank 2
Chapter 4 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- 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_forwardThe sieve analysis of ten soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 90 % Passing No. 40: 76 % Passing No. 200: 34 LL = 37 PL = 25 Group classification: Blank 1 Group index: Blank 2 Blank 1 Add your answer Blank 2 Add your answerarrow_forwardQuestion 3 The sieve analysis of soil and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 48 % Passing No. 40: 28 % Passing No. 200: 6 LL = - %3D PL = NP Group classification: Blank 1 Group index: Blank 2arrow_forward
- 4.16 Plot the particle size distribution curve for each of the three soils the data for which are given below. All three curves should be on the same semi logarithmic diagram. Sieve Number 3/4 in ½ in #4 # 10 # 20 # 40 # 60 # 100 # 200 Particle Diameter from Hydrometer Analysis (mm) Lagoon Clay Beufort, SC 0.045 0.010 0.005 0.001 Data from Sowers (1979). 100 100 100 100 100 100 100 95 80 61 42 37 27 % Passing by Weight Beach Sand Daytona Beach, FL 100 100 100 100 100 98 90 10 2 Weathered Tuff Central America 100 98 95 93 88 82 75 72 68 66 33 21 10 4.17 Determine Cu and Cc for each of the three soils in Problem 4.17. Which of these soils is most well-grazied? Why?arrow_forward4.16 Plot the particle size distribution curve for each of the three soils the data for which are given below. All three curves should be on the same semi logarithmic diagram. Sieve Number 3/4 in ½ in #4 # 10 # 20 # 40 # 60 # 100 # 200 Particle Diameter from Hydrometer Analysis (mm) Lagoon Clay Beufort, SC 0.045 0.010 0.005 0.001 Data from Sowers (1979). 100 100 100 100 100 100 100 95 80 61 42 37 27 % Passing by Weight Beach Sand Daytona Beach, FL 100 100 100 100 100 98 90 10 2 Weathered Tuff Central America 100 98 95 93 88 82 75 72 68 66 33 21 10 4.17 Determine Cu and Ce for each of the three soils in Problem 4.17. Which of these soils is most well-graded? Why?arrow_forward% Finer • Particle size analyses were carried out on two soils-Soil A and Soil B-and the particle size distribution curves are shown in Figure 100 90 80 70 60 50 40 30 Clay 20 10 0 0.001 + Silt 0.01 Soil A Sand Soil B 0.1 1 Particle size (mm) - log scale Gravel 10 Soil A LL 26 (oven-dried; assume same for not dried) B Nonplastic 1. Which of the two soils, in your opinion, is a better material for the core of a rolled earth dam? PL 18arrow_forward
- From a particle size distribution curve of a sandy soil the following were obtain: Size of particle 0.48 mm percentage finer 60;Size of particle 0.33 mm percentage finer 30;Size of particle 0.21 mm percentage finer 10;Size of particle 0.11 mm percentage finer 5;Determine Cc.arrow_forwardFrom a particle size distribution curve of a sandy soil the following were obtain: Size of particle 0.48 mm percentage finer 60;Size of particle 0.33 mm percentage finer 30;Size of particle 0.21 mm percentage finer 10;Size of particle 0.11 mm percentage finer 5;Determine Cu. a. 4.36 b. 1.0 c. 1.08 d. 2.28arrow_forwardQ1: Use the USCS to Classify the soil sample with the following data: % passing 4.75 mm Sieve = 64 % passing 75- Sieve =4 Uniformity Coefficient= 7.5 Coefficient of Curvature=2.7 Plasticity index = 2.5 Solution: Q2: Use the USCS to Classify the soil samples with the following data dalla Soil LL PL Group Symbol Soil Name 15 35 25 ABC 8. ८८ 25 45 65 2-Seepage velocity (m/s) = 70 3- Flow rate in (m3/s) = oss and dry ng www Parmbly & volume change decrease Campering wes Toughness and dry strength dease Presby & val change in 10 20 30 40 50- 60 Liepakt. 70 80 Atra -0.73 (W₂-201 90 Q3: For the soil shown below the hydraulic conductivity is (3 m/day). The sample diameter is 1.5 m. The porosity is (30%). Find: 1- Flow velocity (m/s)== 100 110 120 Soil 4 m ITEarrow_forward
- The sieve analysis of ten soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 100 % Passing No. 40: 78 % Passing No. 200: 8 LL = - PL NP (Non-Plastic) Group classification: Blank 1 Group index: Blank 2 Blank 1 Add your answer Blank 2 Add your answerarrow_forward1. Why will bulk density vary between soils but it is valid to use a constant value for particle density (2.65 g cm-3)?arrow_forward2. The following table shows results of testing of two types of soil: Soil G, W% S, LL PL A. 2.22 25 0.95 0.35 22 В 2.72 38 1.01 0.62 26 C 2.66 45 0.92 0.80 35 Answer the question below: I. Which of these soils contains less clay particles? Note ** show in solution process answers II. Which of these soils has a less void ratio? Note ** show in solution process answers III. Which of these soils has a less dry density? Note ** show in solution process answersarrow_forward
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