Heavy Equipment Operator Certification Exam Prep · Question
Which of the following soil types is generally most susceptible to frost heave in Canadian climates?
Silt and silt-rich clays are highly susceptible to frost heave due to their fine particle size, which allows for capillary action to draw water, and sufficient
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Question: Which of the following soil types is generally most susceptible to frost heave in Canadian climates?
Answer options:
- Clean Gravel
- Coarse Sand ✅ Silt-rich Clay
- Well-graded Crushed Rock
Correct answer: Silt-rich Clay
Explanation: Silt and silt-rich clays are highly susceptible to frost heave due to their fine particle size, which allows for capillary action to draw water, and sufficient pore space to allow for ice lens formation once temperatures drop below freezing, leading to significant volume expansion.
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