Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick wastested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the timewith dial gauge readings are:Time (min)0Settlement (mm) 00.25 10.22 0.42490.6 0.71160.7936641000.86 0.91 1.04d1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848.Scanned by TapScanner

We are given Tv90% = 0.848 Where 90% represent Degree of consolidation U = 90% We know that Degree…

Answered: Q1/ specimen of the fine-grained soil,…

Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time with dial gauge readings are:

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.14P

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was
tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time
with dial gauge readings are:
Time (min)
0
Settlement (mm) 0
0.25 1
0.22 0.42
4
9
0.6 0.71
16
0.79
36
64
100
0.86 0.91 1.04
d
1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848.
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Step 1: Calculation of time for 90 degree consolidation

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