Which one of the following tests CANNOT be done without undisturbed sampling?
A
Shear strength of sand
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B
Shear strength of clay
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C
Determination of compaction parameters
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D
Atterberg limits
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Solution
The correct option is B Shear strength of clay
Clay is more sensitive on remoulding and strength changes drastically. Thus for calculating the shear strength of clay, undisturbed sample is required.
Compaction parameters, i.e, optimum moisture content and dry density are calculated on disturbed sample.
Shear strength of soil is not affected by remoulding.
For atterberg limit, we take the soil sample and mix with water so the sample is disturbed.