the plastic limit (PL) [Eq. (4.9)]. The liquidity index of soil (LI) is the ratio of the difference between the in situ moisture content (%) and the plastic limit to the plasticity index 4. Chapter 4 / Plasticty and Structure of Soil • The plasticity index (PI) is the difference between the liquid limit (LL) and 124 w- PL [Eq. (4.26)], or LI = LL-PL Activity, A, is defined as the ratio of plasticity index to the percent of clay-size fraction by weight in a soil [Eq. (4.28)]. • The structure of cohesionless soils can be single-grained Soils with honeycombed structure have large void ratios that may break down under heavy load and dynamic loading. Dispersion, nonsalt flocculation, and salt flocculation of clay soils were dis- cussed in Section 4.9. Also discussed in this section is the structure of fine- grained soil as it relates to the arrangement of peds and micropore spaces and the arrangement of domains and clusters with silt-size particles. honeycombed. or 4. Problems 4.1 During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N content (%) 4.6 14 38.4 16 36.5 4.7 20 33.1 28 27.0 Plastic limit tests: Students conducted two trials and found that PL = 172% for the first trial and PL = 17.8% for the second trial. a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? Use an average value of PL from 4.2 Refer to the soil in Problem 4.1. A second group of students conducted only one test and found that the groove on the soil sample closed 12.5 mm when = 30.4%. Estimate the liquid limit by the one-point method. b. Determine the liquidity index of the soil if the in situ moisture content is 21% the two plastic limit trails. N= 21 and w = 4.3 Refer to the soil in Problem 4.1. 4.8 a. Determine the flow index.
the plastic limit (PL) [Eq. (4.9)]. The liquidity index of soil (LI) is the ratio of the difference between the in situ moisture content (%) and the plastic limit to the plasticity index 4. Chapter 4 / Plasticty and Structure of Soil • The plasticity index (PI) is the difference between the liquid limit (LL) and 124 w- PL [Eq. (4.26)], or LI = LL-PL Activity, A, is defined as the ratio of plasticity index to the percent of clay-size fraction by weight in a soil [Eq. (4.28)]. • The structure of cohesionless soils can be single-grained Soils with honeycombed structure have large void ratios that may break down under heavy load and dynamic loading. Dispersion, nonsalt flocculation, and salt flocculation of clay soils were dis- cussed in Section 4.9. Also discussed in this section is the structure of fine- grained soil as it relates to the arrangement of peds and micropore spaces and the arrangement of domains and clusters with silt-size particles. honeycombed. or 4. Problems 4.1 During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N content (%) 4.6 14 38.4 16 36.5 4.7 20 33.1 28 27.0 Plastic limit tests: Students conducted two trials and found that PL = 172% for the first trial and PL = 17.8% for the second trial. a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? Use an average value of PL from 4.2 Refer to the soil in Problem 4.1. A second group of students conducted only one test and found that the groove on the soil sample closed 12.5 mm when = 30.4%. Estimate the liquid limit by the one-point method. b. Determine the liquidity index of the soil if the in situ moisture content is 21% the two plastic limit trails. N= 21 and w = 4.3 Refer to the soil in Problem 4.1. 4.8 a. Determine the flow index.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
100%
How to solve 4.1
![the plastic limit (PL) [Eq. (4.9)].
The liquidity index of soil (LI) is the ratio of the difference between the
in situ moisture content (%) and the plastic limit to the plasticity index
4.
Chapter 4 / Plasticty and Structure of Soil
• The plasticity index (PI) is the difference between the liquid limit (LL) and
124
w- PL
[Eq. (4.26)], or
LI =
LL-PL
Activity, A, is defined as the ratio of plasticity index to the percent of clay-size
fraction by weight in a soil [Eq. (4.28)].
• The structure of cohesionless soils can be single-grained
Soils with honeycombed structure have large void ratios that may break
down under heavy load and dynamic loading.
Dispersion, nonsalt flocculation, and salt flocculation of clay soils were dis-
cussed in Section 4.9. Also discussed in this section is the structure of fine-
grained soil as it relates to the arrangement of peds and micropore spaces and
the arrangement of domains and clusters with silt-size particles.
honeycombed.
or
4.
Problems
4.1 During Atterberg limit tests in the soil mechanics laboratory, the students
obtained the following results from a clayey soil.
Liquid limit tests:
Number of
Moisture
blows, N
content (%)
4.6
14
38.4
16
36.5
4.7
20
33.1
28
27.0
Plastic limit tests: Students conducted two trials and found that PL = 172%
for the first trial and PL = 17.8% for the second trial.
a. Draw the flow curve and obtain the liquid limit.
b. What is the plasticity index of the soil? Use an average value of PL from
4.2 Refer to the soil in Problem 4.1. A second group of students conducted only
one test and found that the groove on the soil sample closed 12.5 mm when
= 30.4%. Estimate the liquid limit by the one-point method.
b. Determine the liquidity index of the soil if the in situ moisture content is 21%
the two plastic limit trails.
N= 21 and w =
4.3 Refer to the soil in Problem 4.1.
4.8
a. Determine the flow index.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F711908d8-7456-4dad-baa5-347305ed075d%2Faadc9e7a-14cc-4911-b34f-78335c33d269%2Fa86rz5k.jpeg&w=3840&q=75)
Transcribed Image Text:the plastic limit (PL) [Eq. (4.9)].
The liquidity index of soil (LI) is the ratio of the difference between the
in situ moisture content (%) and the plastic limit to the plasticity index
4.
Chapter 4 / Plasticty and Structure of Soil
• The plasticity index (PI) is the difference between the liquid limit (LL) and
124
w- PL
[Eq. (4.26)], or
LI =
LL-PL
Activity, A, is defined as the ratio of plasticity index to the percent of clay-size
fraction by weight in a soil [Eq. (4.28)].
• The structure of cohesionless soils can be single-grained
Soils with honeycombed structure have large void ratios that may break
down under heavy load and dynamic loading.
Dispersion, nonsalt flocculation, and salt flocculation of clay soils were dis-
cussed in Section 4.9. Also discussed in this section is the structure of fine-
grained soil as it relates to the arrangement of peds and micropore spaces and
the arrangement of domains and clusters with silt-size particles.
honeycombed.
or
4.
Problems
4.1 During Atterberg limit tests in the soil mechanics laboratory, the students
obtained the following results from a clayey soil.
Liquid limit tests:
Number of
Moisture
blows, N
content (%)
4.6
14
38.4
16
36.5
4.7
20
33.1
28
27.0
Plastic limit tests: Students conducted two trials and found that PL = 172%
for the first trial and PL = 17.8% for the second trial.
a. Draw the flow curve and obtain the liquid limit.
b. What is the plasticity index of the soil? Use an average value of PL from
4.2 Refer to the soil in Problem 4.1. A second group of students conducted only
one test and found that the groove on the soil sample closed 12.5 mm when
= 30.4%. Estimate the liquid limit by the one-point method.
b. Determine the liquidity index of the soil if the in situ moisture content is 21%
the two plastic limit trails.
N= 21 and w =
4.3 Refer to the soil in Problem 4.1.
4.8
a. Determine the flow index.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 4 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning