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Toughness index is defined as the ratio of
  • a)
    Plasticity index to consistency index
  • b)
    Plasticity index to flow index
  • c)
    liquidity index to flow index
  • d)
    consistency index to liquidity index
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Toughness index is defined as the ratio ofa)Plasticity index to consis...
Toughness Index in Soil Mechanics

Toughness index is a measure of the soil's ability to resist deformation under stress. It is defined as the ratio of plasticity index to flow index.

Plasticity Index

Plasticity index is a measure of the range of moisture content over which the soil can be molded. It is the difference between the liquid limit and the plastic limit of the soil.

Flow Index

Flow index is a measure of the soil's ability to flow under pressure. It is the slope of the flow curve on a semi-logarithmic plot of shear stress versus shear rate.

Toughness Index Formula

Toughness index formula is given as:

Toughness Index = Plasticity Index / Flow Index

Therefore, the correct answer is option 'B', i.e., the ratio of plasticity index to flow index.
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Community Answer
Toughness index is defined as the ratio ofa)Plasticity index to consis...
B plasticity index to flow index
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Toughness index is defined as the ratio ofa)Plasticity index to consistency indexb)Plasticity index to flow indexc)liquidity index to flow indexd)consistency index to liquidity indexCorrect answer is option 'B'. Can you explain this answer?
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