The coefficient of curvature for a well graded soil, must be from-
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A.
0.5 to 1.0
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B.
3.0 to 4.0
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C.
4.0 to 5.0
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D.
1.0 to 3.0
Correct Answer:
D. 1.0 to 3.0
Explanation:
For a soil to be classified as well-graded, its coefficient of curvature (Cc) must fall within the range of 1.0 to 3.0. Additionally, the coefficient of uniformity (Cu) should be greater than 4 for gravels and greater than 6 for sands. These parameters ensure that the soil contains a wide and even distribution of various grain sizes, which enhances its engineering properties.
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