Akademik Veri Yönetim Sistemi
Geo-Chicago Conference - Sustainability, Energy, and the Environment (Geo-Chicago), Illinois, Amerika Birleşik Devletleri, 14 - 18 Ağustos 2016, ss.81-90
The water uptake and the hydraulic conductivity behavior of a low quality (LQ) GCL were determined in this study. The term "low quality" refers to the physical properties such as liquid limit rather than the chemical properties of bentonite used in GCL. For this purpose, GCL samples were hydrated over compacted silty sand subsoil which was taken from the landfill liner. After 7, 17, 30, 62, and 90 days of hydration, GCLs were removed from the flexible-wall permeameters and subjected to the hydraulic conductivity tests with deionized water. Results illustrated that GCL water contents increased up to 7 days of hydration period and then, leveled off. The relationship between final water contents and liquid limits were also evaluated. The data from this study together with the literature suggest that the greater the liquid limit, the greater is the GCL final water content. However, the hydraulic conductivity behaviors of GCLs were rather different from the literature. Increase in the hydration duration led to decrease the required PVF for the equilibrium hydraulic conductivity (2.4x10(-11) m/s). However, initial hydraulic conductivities of LQ-GCL were about 2.0x10(-6) m/s. Although they decreased to approximate to 2.4x10(-11) m/s over time, higher initial hydraulic conductivity seems to be significant when LQ-GCL is installed in the field.