Thermally induced volume change and excess pore water pressure of soft Bangkok clay |
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| Institution: | 1. Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India;2. Laboratory of Soil Mechanics, School of Architecture, Civil and Environmental Engineering, Swiss Federal Institute of Technology, Lausanne (EPFL), Switzerland;3. Department of Civil, Environmental, Aerospace, Materials Engineering, Università degli Studi di Palermo, Italy;1. Department of Geoscience, University of Padua, via Gradenigo, 6, I-35131 Padova, Italy;2. CNR — Institute of Geociences and Georesources, via Gradenigo, 6, I-35131 Padova, Italy;3. DICEA (Department of Civil Engineering), University of Padua, via Marzolo, 9, I-35131 Padova, Italy;1. Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China;2. Department of Civil Engineering, Central South University, Shaoshan South Road 22, Changsha 410075, China |
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| Abstract: | This paper presents the results of an experimental investigation carried out to study thermally induced volume changes under drained heating condition and thermally induced excess pore water pressures under undrained heating condition of soft Bangkok clay. The clay was heated up from room temperature (25 °C) to 90 °C using a modified oedometer and a triaxial test apparatus, respectively. The clay was found to exhibit temperature induced volume changes and temperature induced excess pore water pressures, in the range of temperatures investigated, depending mainly on the stress history. A theoretical microstructure mechanism that can interpret the thermally induced volume change behaviour at different stress conditions is presented in this study. Furthermore, the thermally induced excess pore water pressure behaviour at different stress conditions is explained using the unloading–reloading hysteresis of the typical soil consolidation curve. The results of this study provide additional data that can enhance the understanding of the thermo-mechanical behaviour concepts of saturated clays. |
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