What is the primary concern when designing a foundation on expansive clay?

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Question: What is the primary concern when designing a foundation on expansive clay?

Options:

Correct Answer: Settlement

Solution:

Settlement is a primary concern when designing foundations on expansive clay due to its volume change with moisture content.

What is the primary concern when designing a foundation on expansive clay?

What is the primary concern when designing a foundation on expansive clay?

Step 1: Understand what expansive clay is. It is a type of clay that can change its size when it gets wet or dry.
Step 2: Recognize that when expansive clay gets wet, it expands, and when it dries, it shrinks.
Step 3: Realize that this change in size can cause the ground to move up and down.
Step 4: Know that if a building's foundation is built on this type of clay, it can settle unevenly as the clay expands and shrinks.
Step 5: Understand that this uneven settling can lead to cracks in the building and other structural problems.
Step 6: Conclude that the primary concern when designing a foundation on expansive clay is to manage this settlement caused by the clay's volume changes.

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