If the value of uniformity coefficient of a soil sample is nearly equa

1.	If the value of uniformity coefficient of a soil sample is nearly equal to one. This sample will be designated as1. Well graded soil2. Uniformly graded soil3. Poorly graded soil4. None of the above
Answer» Correct Answer - Option 2 : Uniformly graded soil Explanation: Coefficient of Uniformity / Uniformity Coefficient: It is defined as the ratio of D60 and D10 sieve sizes in sieve analysis of granular material. Higher is the value of Cu larger is the range of the particle size. \({C_u} = \frac{{{D_{60}}}}{{{D_{10}}}}\) For uniformly graded soil, Cu = 1 For well graded sand, C_u > 6 For well graded gravel Cu > 4 Coefficient of Curvature / Curvature Coefficient: \({C_c} = \frac{{D_{30}^2}}{{{D_{60}} \;\times \;{D_{10}}}}\) For well graded soil, 1 < C_c < 3 For gap graded soil, 1 < Cc or Cc > 3 where D60 = size at 60% finer by weight D30 = size at 30% finer by weight D10 = size at 10% finer by weight = Effective size

If the value of uniformity coefficient of a soil sample is nearly equal to one. This sample will be designated as1. Well graded soil2. Uniformly graded soil3. Poorly graded soil4. None of the above

Answer» Correct Answer - Option 2 : Uniformly graded soil

Explanation:

Coefficient of Uniformity / Uniformity Coefficient:

It is defined as the ratio of D60 and D10 sieve sizes in sieve analysis of granular material.

Higher is the value of Cu larger is the range of the particle size.

\({C_u} = \frac{{{D_{60}}}}{{{D_{10}}}}\)

For uniformly graded soil, Cu = 1

For well graded sand, C_u > 6

For well graded gravel Cu > 4

Coefficient of Curvature / Curvature Coefficient:

\({C_c} = \frac{{D_{30}^2}}{{{D_{60}} \;\times \;{D_{10}}}}\)

For well graded soil, 1 < C_c < 3

For gap graded soil, 1 < Cc or Cc > 3

where

D60 = size at 60% finer by weight

D30 = size at 30% finer by weight

D10 = size at 10% finer by weight = Effective size

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