# The following values for a sand are given: D 10 = 0.3 mm, D 30 = 0.41 mm, and D 60 = 0.77 mm. Determine C u and C c , and state if it is a well-graded or a poorly-graded soil.

### Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
Publisher: Cengage Learning
ISBN: 9781305970939

### Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
Publisher: Cengage Learning
ISBN: 9781305970939

#### Solutions

Chapter
Section
Chapter 2, Problem 2.2P
Textbook Problem

## The following values for a sand are given: D10 = 0.3 mm, D30 = 0.41 mm, and D60 = 0.77 mm. Determine Cu and Cc, and state if it is a well-graded or a poorly-graded soil.

Expert Solution
To determine

Calculate the uniformity coefficient Cu and coefficient of gradation of the soil Cc.

### Explanation of Solution

Given information:

The diameter of the particle corresponding to 60% finer (D60) is 0.77 mm.

The diameter of the particle corresponding to 30% finer (D30) is 0.41 mm.

The diameter of the particle corresponding to 10% finer (D10) is 0.3 mm.

Calculation:

Calculate the uniformity coefficient (Cu) using the relation.

Cu=D60D10

Substitute 0.77 mm for D60 and 0.3 mm for D10.

Cu=0.770.3=2.57

Hence, the uniformity coefficient is 2.57_

### Want to see the full answer?

Check out a sample textbook solution.See solution

### Want to see this answer and more?

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

See solution

Find more solutions based on key concepts
Show solutions
On a gusty windy day, the blades of a wind turbine are turning at a rate of 200 revolutions per minute when sud...

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

What is ECD and what can result from it?

Automotive Technology: A Systems Approach (MindTap Course List)

Discuss the trade offs between security and privacy.

Fundamentals of Information Systems

What is risk appetite? Explain why it varies among organizations.

Principles of Information Security (MindTap Course List)

What view of a drawing usually shows the most detail?

Precision Machining Technology (MindTap Course List)

Are top managers likely to be more effective if they have IT experience? Why or why not?

Systems Analysis and Design (Shelly Cashman Series) (MindTap Course List)

Assistive Technologies You have just purchased a new computer and, because of a visual impairment, you are havi...

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)

How can cutting torch tip seals be repaired?

Welding: Principles and Applications (MindTap Course List)

If your motherboard supports ECC DDR3 memory, can you substitute non-ECC DDR3 memory?

A+ Guide to Hardware (Standalone Book) (MindTap Course List)