Clay possesses the highest strength in which of the following conditions?
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A.
When heated to very high temperatures, up to redness
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B.
When at liquid limit
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C.
When with kaolinite at room temperatures
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D.
When at shrinkage limit
Correct Answer:
A. When heated to very high temperatures, up to redness
Explanation:
The correct answer is When heated to very high temperatures, up to redness.
Clay gains its maximum strength through the process of firing or vitrification. When clay is subjected to intense heat, typically reaching a red-hot state, a chemical and physical transformation occurs. The particles fuse together, closing pores and creating a hard, stone-like material. This high-temperature treatment significantly increases the material's structural integrity and durability compared to its state at the shrinkage, liquid, or plastic limits, where it still contains moisture and remains relatively weak or malleable.
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