Civil Engineering PE

Category - Material QC

Which of the following is a rule of thumb" that an inspector can do in the field to determine if a soil is plastic?
  1. Jump on the soil
  2. Roll the soil between his fingers
  3. Roll the soil into a ball and throw it
  4. None of the above
Explanation
Answer: B - An inspector can roll the soil between his fingers to determine if the soil is plastic. If the soil does not crumble easily, it is assumed that the soil is plastic. Laboratory testing is required to determine the actual plasticity of a soil.
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