SSC JE Civil Engineering 29-Oct-2020 Shift 1 Paper

Question : 136 of 200

Marks: +1, -0

In a consolidation test, when the load is changed from 50

\kN\/\m^2

to 100

\kN\/\m^2

, then the void ratio changes from 0.80 to 0.60. The coefficient of compressibility will be:

Solution:

Given,

\Δe=0.2

\ov{\σ}_{o} =50 {\kN} \/ {\m}^{2}

\ov{\σ}_{1}=100 {\kN} \/ {\m}^{2}

C_{c}=0.664 {\m}^{2} \/ {\kN}

a_{v}=|{\Δe}/{ {\σ}_{o}↖{-}- {\σ}_{1}↖{-}}|={0.2}/{50}=0.004

∴ {a}_{{v}}=0.004 {\m}^{2} \/ {\kN}

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