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Small-scale Evaporation Tests On Clay: Influence Of Drying Rate On Clayey Soil Layer

R. Tollenaar, L. V. Paassen, C. Jommi
Published 2018 · Environmental Science

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Cracks in drying soils have detrimental effects on the integrity of geotechnical structures. The evaporation rate is recognized to play an important role in fracture generation, having a direct impact on the amount of cracks produced. This investigation examined the drying behaviour of a clay with different initial water contents and under different evaporative conditions. Small scale evaporation experiments were carried out using a river clay and commercially available suction measuring equipment. The results showed that the initial conditions have great influence on the drying performance of a soil, which can be partly attributed to the influence of the surface texture and the pore structure. It was observed that under certain circumstances, the evaporation of a soil surface can be higher than that of open water. The different evaporation rates had a marked effect on the water distributions with depth within the soil. The evaporation rate also produced a dynamic response of the soil water retention curve.
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