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Determination of the desiccation behavior of clay slurries

机译：黏土浆料干燥行为的测定

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The main objective of this study was to determine the desiccation behavior of clay slurries. A clay slurry with high water adsorption capacity (wL = 180%, wP = 60%, wS = 20) was used to determine the soil water characteristic curve (SWCC), shrinkage curve, and hydraulic conductivity. The last parameter was determined similar to the Instantaneous Profile Method using evaporation tests. Results indicated that the clay slurry had an air entry value (AEV) of 1000 kPa and a residual suction of 5000 kPa that occurred at the plastic limit and the shrinkage limit, respectively. The discrepancy between theoretical and measured shrinkage limit was due to the gradual increase in clay particle contact. Unlike soils, the saturated hydraulic conductivity varied by two orders of magnitude (4 x10_10 m/s at 20 kPa to 3x10_12 m/s at AEV). The unsaturated k further decreased to 10_14 m/s at 6 x104 kPa beyond which vapor flow took place.
机译：这项研究的主要目的是确定粘土浆料的干燥行为。使用具有高吸水能力（wL = 180％，wP = 60％，wS = 20）的粘土浆液来确定土壤水分特征曲线（SWCC），收缩率曲线和水力传导率。使用蒸发测试，类似于瞬时分布法确定最后一个参数。结果表明，在塑性极限和收缩极限分别出现的空气进入值（AEV）为1000 kPa和残余吸力为5000 kPa。理论和测量的收缩极限之间的差异是由于粘土颗粒接触的逐渐增加。与土壤不同，饱和导水率变化了两个数量级（在20 kPa下为4 x10_10 m / s，在AEV下为3x10_12 m / s）。在6 x104 kPa时，不饱和度k进一步降低至10_14 m / s，超过此范围发生了蒸汽流动。

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