Department of Civil and Environmental Engineering, Carleton University, Ottawa, Canada.
Waste Manag. 2013 Jan;33(1):67-73. doi: 10.1016/j.wasman.2012.08.010. Epub 2012 Sep 11.
Use of Geosynthetic Clay Liners (GCLs) in landfill barrier design has been the focus of recent studies investigating their ability to prevent contaminant transport to groundwater. In this paper, the hydration of two GCL products placed in contact with clay subsoils at different initial moisture contents is described under both isothermal conditions at room temperature, and daily thermal cycles. The rate of hydration of the GCL and its final equilibrium moisture content were significantly influenced by the amount of moisture made available to it through the subsoil. The two types of GCLs were also found to exhibit different hydration behaviors under similar experimental conditions. The study revealed that GCLs undergoing daily thermal cycles absorbed much less moisture over time than the GCLs kept at constant room temperature (ratio 1:4). In comparison with other types of subsoils, the final equilibrium moisture content attained by the GCL from clay subsoil was significantly less than that for sand subsoil.
在研究中，使用土工合成黏土衬垫（GCL）来设计垃圾填埋场的阻隔层是一个热点，该研究主要关注 GCL 防止污染物向地下水迁移的能力。本文描述了在恒温（室温）和每日热循环条件下，两种不同初始含水量的 GCL 产品与黏土底土接触时的水化情况。GCL 的水化速率及其最终平衡含水量显著受到底土中可提供水分的影响。在类似的实验条件下，还发现两种类型的 GCL 表现出不同的水化行为。研究表明，与保持在恒定室温下的 GCL 相比，经历每日热循环的 GCL 随时间的推移吸收的水分要少得多（比例为 1:4）。与其他类型的底土相比，GCL 从黏土底土中达到的最终平衡含水量明显小于从沙土底土中达到的最终平衡含水量。
