Abstract
This research aims to investigate the effect of temperature changes on the compression index and collapse potential of the residual granitic soil that is widely encountered in Malaysia. An experimental study was conducted on the compacted soil using a modified temperaturecontrolled oedometer. Temperatures of 27, 40, and 60 oC were applied on two series of soil specimens with different values of dry density. Experimental results showed that the value of compression index is independent of temperature. On the other hand, heating caused a reduction in collapse potential, which was more pronounced at low dry density.
Highlights
Over the past two decades, geotechnical engineers have been increasingly examining thermal influences on physical and mechanical properties of soil
Present-day activities relating to geotechnics, such as the storage of nuclear waste, deep offshore well drilling, and foundations subjected to temperature changes, have led researchers to study the thermo-mechanical behavior of soils at temperatures of up to 100 °C and above
Literature review shows that no data is currently available about the effects of temperature on the collapse potential of the residual granitic soil
Summary
Over the past two decades, geotechnical engineers have been increasingly examining thermal influences on physical and mechanical properties of soil. A general outcome of these studies is that an increase in temperature induces a decrease in the void ratio of normally consolidated soil, whereas warming may cause swelling in overconsolidated soils These studies show that the thermal volumetric behavior of unsaturated soils is influenced by the overconsolidation ratio and suction. Cekerevac and Laloui [4] study the thermo-mechanical behavior of some artificial clayey soils to assess their use as a buffer for nuclear waste containers. They claim that an increase in temperature of a saturated soil to less than the boiling point of water (100 °C) impacts the volume change, shear strength, and stiffness of soil. Results obtained by experimental study of temperature effects on the compression index and collapse potential of the residual granitic soil are presented in this paper
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