Coefficient of Consolidation by the Slope Method
Al-Zoubi MS
(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-$\sqrt{t}$ 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-$\sqrt{t}$ 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.

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Author Al-Zoubi MS Title Coefficient of Consolidation by the Slope Method Symposium , Committee on