ISSN: 0149-6115
Published Online: 5 June 2008
Page Count: 5

Coefficient of Consolidation by the Slope Method

Al-Zoubi, Mohammed Shukri
Assistant Professor of Civil Engineering,Civil and Environmental Engineering Department, Faculty of Engineering/Mutah University,

(Received 21 September 2006; accepted 4 May 2008)

Abstract

The slope method explicitly relates the coefficient of consolidation c^v to the slope of the initial linear segment of the observed δ^t-t curve and to the end of primary settlement δ^p. The slope method utilizes the same graphical construction as the Taylor method but eliminates the use of the factor 1.15 that usually leads to lower δ^p and higher c^v as compared to the Casagrande method and pore water pressure measurements. Instead, the point at which the δ^t-t curve deviates from the linear portion (at U of about 50 %) is considered for estimating δ^p. Oedometer test results on four soils show that the c^v values of the slope and Casagrande methods are comparable but lower than those of the Taylor method.

Keywords:
coefficient of consolidation, end of primary settlement, compaction, permeability, compressibility, preconsolidation, degree of consolidation

Paper ID: GTJ100810
DOI: 10.1520/GTJ100810
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