What is the term for the ratio of the change in void ratio to the change in effe

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Question: What is the term for the ratio of the change in void ratio to the change in effective stress during consolidation?

Options:

Correct Answer: Compression index (Cc)

Solution:

The compression index (Cc) is defined as the ratio of the change in void ratio to the change in effective stress during consolidation.

What is the term for the ratio of the change in void ratio to the change in effective stress during consolidation?

What is the term for the ratio of the change in void ratio to the change in effective stress during consolidation?

Step 1: Understand what void ratio means. It is the ratio of the volume of voids (spaces) to the volume of solids in a soil sample.
Step 2: Know what effective stress is. It is the stress that contributes to the strength of the soil, calculated by subtracting pore water pressure from total stress.
Step 3: Learn about consolidation. It is the process where soil volume decreases due to the expulsion of water from the voids when stress is applied.
Step 4: Identify the change in void ratio. This is how much the void ratio decreases during consolidation.
Step 5: Identify the change in effective stress. This is how much the effective stress increases during consolidation.
Step 6: Understand the ratio. The compression index (Cc) is the ratio of the change in void ratio to the change in effective stress.
Step 7: Conclude that the term you are looking for is the compression index (Cc).

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