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Compression index on a soil helps to determine
  • a)
    total time required for consolidation
  • b)
    Time required for 50 percent consolidation
  • c)
    total settlement of clay layer
  • d)
    pre-consolidation pressure fo clay
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Compression index on a soil helps to determinea)total time required fo...
Compression index is a soil parameter that helps in determining the settlement of a clay layer. It is defined as the slope of the linear portion of the compression curve, which is obtained by plotting the logarithm of the void ratio (e) against the logarithm of the effective stress (σ’) on a semi-logarithmic scale.

The compression index is an important parameter for analyzing the consolidation behavior of soils and is commonly used in geotechnical engineering. The following are the details of how it helps to determine the settlement of a clay layer.

Total settlement of clay layer
The compression index helps in determining the total settlement of a clay layer. The compression curve obtained from a consolidation test can be used to calculate the settlement of a clay layer using the following equation:

ΔH = (Cc * H * log10 (σ1/σ2))

where,
ΔH = Total settlement of the clay layer
Cc = Compression index
H = Height of the clay layer
σ1 and σ2 = Effective stresses at the beginning and end of the consolidation period, respectively.

The above equation shows that the compression index is used to calculate the total settlement of a clay layer.

Conclusion
In conclusion, the compression index of a soil helps in determining the settlement of a clay layer. It is an important parameter for geotechnical engineers as it helps in analyzing the consolidation behavior of soils.
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Community Answer
Compression index on a soil helps to determinea)total time required fo...
Because of clay soil water is not allowed to the soil
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Compression index on a soil helps to determinea)total time required for consolidationb)Time required for 50 percent consolidationc)total settlement of clay layerd)pre-consolidation pressure fo clayCorrect answer is option 'C'. Can you explain this answer?
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