Homework Help is Here – Start Your Trial Now!
Engineering
Civil Engineering
A soil sample has the following size distribution; 4 to 2mm = 17%, 2 to 0.05 mm = 12%, 0.5 to 0.005 mm = 22% 0.005 to 0.002 mm = 10% <0.002 mm = 39%   what is the percent clay silt and sand? What are the modifier and textural classification?

A soil sample has the following size distribution; 4 to 2mm = 17%, 2 to 0.05 mm = 12%, 0.5 to 0.005 mm = 22% 0.005 to 0.002 mm = 10% <0.002 mm = 39%   what is the percent clay silt and sand? What are the modifier and textural classification?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

A soil sample has the following size distribution;

4 to 2mm = 17%,

2 to 0.05 mm = 12%,

0.5 to 0.005 mm = 22%

0.005 to 0.002 mm = 10%

<0.002 mm = 39%

 

what is the percent clay silt and sand? What are the modifier and textural classification? 

Table 1.-Guide for Determining Rock Fragment Modifier of Texture. Click here for an MS-Excel spreadsheet that calculates the texture modifiers for flat and nonflat rock fragments. Total Rock Fragments (Vol. %) 21535 2 35 < 60 ≥ 60 90 Gravel (GR), cobbles (CB), stones (ST), and boulders (BY) (Substitute channers for gravel and flagstones for cobbles, where applicable)¹ IF CB 2 1.5 ST + 2 BY IF ST 2 1.5 BY IF ST < 1.5 BY 2.90 IF GR 2 1.5 CB+2 ST +2.5BY Gravelly Very Gravelly Extremely Gravelly Cobbly Very Cobbly Extremely Cobbly Stony Very Stony Extremely Stony 1. Since total rock fragments are 28 percent, choose the first row (2 15 and < 35). 2. Under "Gravel (GR), cobbles,..., test the criterion in the left-most column. Is 15% GR 2 1.5 (10% CB) + 2 ( 3 % ST) ? Answer: NO. Bouldery Gravel Cobbles Stones Boulders Example: Determine the rock fragment modifier for a soil that contains 15 percent gravel (GR), 10 percent cobbles (CB), and 3 percent stones (ST). 3. Proceed to the next column. Is 10% CB 2 1.5 (3% ST)? Answer: YES. STOP. The modifier is Cobbly. Very Bouldery Extremely Bouldery If both flat and nonflat rock fragments are present, the quantity in each size class is summed (e.g.. gravel + channers, cobbles + flagstones). The sums are used to determine the appropriate quantity/size modifier. If the amounts of flat and nonflat rock fragments within any given size class are equal, the nonflat modifier takes precedence. For example, if there are 10 percent gravel and 10 percent channers, the modifier is gravelly. 10 100 20 30 40 SO Clay Separate, % 60 70 sandy clay XXX sandy -clay loam- sandy loam loamy. sand sandy 80 90 100 clay/ 10 clay loam loam % Sand Separate, % 30 Silt Separate, % P %0 E silty7 clay silty clay loam silt Kloam 30 D 20 70 80 silt 100
Transcribed Image Text:Table 1.-Guide for Determining Rock Fragment Modifier of Texture. Click here for an MS-Excel spreadsheet that calculates the texture modifiers for flat and nonflat rock fragments. Total Rock Fragments (Vol. %) 21535 2 35 < 60 ≥ 60 90 Gravel (GR), cobbles (CB), stones (ST), and boulders (BY) (Substitute channers for gravel and flagstones for cobbles, where applicable)¹ IF CB 2 1.5 ST + 2 BY IF ST 2 1.5 BY IF ST < 1.5 BY 2.90 IF GR 2 1.5 CB+2 ST +2.5BY Gravelly Very Gravelly Extremely Gravelly Cobbly Very Cobbly Extremely Cobbly Stony Very Stony Extremely Stony 1. Since total rock fragments are 28 percent, choose the first row (2 15 and < 35). 2. Under "Gravel (GR), cobbles,..., test the criterion in the left-most column. Is 15% GR 2 1.5 (10% CB) + 2 ( 3 % ST) ? Answer: NO. Bouldery Gravel Cobbles Stones Boulders Example: Determine the rock fragment modifier for a soil that contains 15 percent gravel (GR), 10 percent cobbles (CB), and 3 percent stones (ST). 3. Proceed to the next column. Is 10% CB 2 1.5 (3% ST)? Answer: YES. STOP. The modifier is Cobbly. Very Bouldery Extremely Bouldery If both flat and nonflat rock fragments are present, the quantity in each size class is summed (e.g.. gravel + channers, cobbles + flagstones). The sums are used to determine the appropriate quantity/size modifier. If the amounts of flat and nonflat rock fragments within any given size class are equal, the nonflat modifier takes precedence. For example, if there are 10 percent gravel and 10 percent channers, the modifier is gravelly. 10 100 20 30 40 SO Clay Separate, % 60 70 sandy clay XXX sandy -clay loam- sandy loam loamy. sand sandy 80 90 100 clay/ 10 clay loam loam % Sand Separate, % 30 Silt Separate, % P %0 E silty7 clay silty clay loam silt Kloam 30 D 20 70 80 silt 100
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Methods of subsurface exploration
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.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Structural Analysis
Structural Analysis
Civil Engineering
ISBN:
9781337630931
Author:
KASSIMALI, Aslam.
Publisher:
Cengage,
Structural Analysis (10th Edition)
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Sustainable Energy
Sustainable Energy
Civil Engineering
ISBN:
9781337551663
Author:
DUNLAP, Richard A.
Publisher:
Cengage,
Traffic and Highway Engineering
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS