Abstract
In this paper, we report on the results of an experimental study of the yielding and shear strength behavior of a normally consolidated silty clay soil from eastern Germany. The shear strength tests were performed on remolded forms of the soil using a triaxial cell which can regulate the temperature of the specimen. The experimental program comprised a series of pressure stepping compression consolidated drained (CD) triaxial tests at temperatures of 20, 40 and 60 °C. Overall, although the volume change behavior of the soil was found to exhibit some variations with changes in temperature, possibly due to changes in the double layer thickness of the clay fraction of the soil upon heating, the shear strength behavior (in terms of effective angle of internal friction) of the silty clay soil was found to exhibit minor changes with variations in temperature and can be assumed to be independent of temperature for the range considered in this study.
Highlights
Analyzing the effect of temperature changes on the thermomechanical, yielding and shear strength behavior of soils is essential for various engineering applications including seasonal thermal energy storage, freezing/thawing soil processes, hydrocarbon extraction from oil sands, radioactive waste disposal, etc
In this paper, we report on the results of an experimental study of the yielding and shear strength behavior of a normally consolidated silty clay soil from eastern Germany
The experimental program comprised a series of pressure stepping compression consolidated drained (CD) triaxial tests at temperatures of 20, 40 and 60 ◦C
Summary
Analyzing the effect of temperature changes on the thermomechanical, yielding and shear strength behavior of soils is essential for various engineering applications including seasonal thermal energy storage, freezing/thawing soil processes, hydrocarbon extraction from oil sands, radioactive waste disposal, etc. In most of these applications, the soil may experience changes in temperature of up to 30 ◦C [1]. One of the earliest studies on the effect of temperature changes on the soil consolidation behavior was published by Gray [2]. Several modeling and experimental studies were conducted on the thermomechanical and yielding behavior of fine-grained soils at different temperature conditions [1,3–6]. Experimental investigations on the thermomechanical properties of an unsaturated silt at the temperature range of 25 to 60 ◦C were conducted by Uchaipichat and Khalili [7] using a modified triaxial device
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