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Root Time Method Quiz

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Questions and Answers

What does the intersection of the line DE with the experimental curve indicate?

The theoretical maximum value of consolidation

The point corresponding to 90% consolidation (correct)

The point of maximum consolidation

The average degree of consolidation at 60%

What is the relationship between the linear part of the theoretical curve and the abscissa at 90% consolidation?

The abscissa at 90% consolidation is half of the linear part

The abscissa at 90% consolidation is 1.15 times the linear part (correct)

The abscissa at 90% consolidation is twice the linear part

The abscissa at 90% consolidation is equal to the linear part

What is the coefficient of consolidation given at U = 90%?

$c_v = 0.848 d^2 t_{60}$

$c_v = 0.848 d^2 t_{90}$ (correct)

$c_v = 1.15 d^2 t_{90}$

$c_v = 0.360 d^2 t_{90}$

Up to what percentage of consolidation is the theoretical curve linear?

<p>60%</p> Signup and view all the answers

Which factor is plotted against the square root of time in the root time method?

<p>Average degree of consolidation</p> Signup and view all the answers

Study Notes

Root Time Method

The root time method, developed by Taylor, utilizes the relationship between consolidation and the square root of time.
The method plots dial gauge readings against the square root of time in minutes and the average degree of consolidation against the square root of time factor.
The theoretical curve exhibits a linear behavior up to 60% consolidation.
At 90% consolidation, the abscissa (AC) is 1.15 times the abscissa (AB) of the linear portion of the curve.
The intersection of the line DE with the experimental curve identifies the point (a 90) corresponding to U = 90%.
The corresponding √t 90 can be determined from this intersection.
The value of T v corresponding to U = 90% is 0.848.
The coefficient of consolidation (cv) is calculated using the formula: c v = 0.848d 2 / t 90, where d is the drainage path length.

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Description

Test your knowledge of the Root Time Method developed by Taylor. This quiz covers key concepts including the relationship between consolidation and time, plotting techniques, and calculations involving the coefficient of consolidation. Challenge yourself to understand the theoretical and experimental aspects of this method.