An innovative device for determining the soil water retention curve under high suction at different temperatures |
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| Authors: | Simon Salager Marta Rizzi Lyesse Laloui |
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| Institution: | (1) Soil Mechanics Laboratory, Swiss Federal Institute of Technology, EPFL, Station 18, 1015 Lausanne, Switzerland; |
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| Abstract: | To characterise the water retention behaviour of fine soils, high suction values are applied. In this range of values, the
vapour equilibrium technique is usually used. This paper presents an innovative device, a sorption bench that permits the
determination of the water retention curve of soil. With this new testing method, the time required for testing is significantly
reduced. In addition, this apparatus enables the thermal conditions of a test to be controlled; thus, the applied suction
can be better controlled, and the water retention curve for different temperatures can be determined. Another valuable aspect
of the device is the adopted technical solution that permits weighing of the samples inside the desiccators at any time. Consequently,
the water content kinetics can be defined without disturbing the drying or wetting processes. |
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