BARRIER PERFORMANCE OF GCLs AT HIGH TEMPERATURE
-
- ISHIMORI Hiroyuki
- 立命館大学理工学部
-
- KATSUMI Takeshi
- 京都大学大学院地球環境学堂
-
- FUKAGAWA Ryoichi
- 立命館大学理工学部
Bibliographic Information
- Other Title
-
- 高温条件下におけるジオシンセティッククレイライナーの遮水性
- コウオン ジョウケン カ ニ オケル ジオシンセティッククレイライナー ノ シャスイセイ
Search this article
Abstract
Temperatures of 20-60 °C have been reported at landfill base. Such high temperatures have a potential to increase the leakage from lining system. Some researchers conducted column tests with the thermal gradient in order to investigate the effects of the thermal condition on the barrier performance of the lining system. They evaluated the desiccation and deterioration of geosynthetics, and the water content distribution of the dried base layer. However, there are few reports that the leakage increased by the thermal effects were quantitatively evaluated.<br> In this study, column tests with geosynthetic clay liner (GCL) were conducted using 20 °C or 60 °C sodium chloride solution as the permeant liquid. These column tests simulated an actual lining system, which consisted of GCL and base layer soil. By monitoring the temperature and water pressure head in the base layer and the leakage volume from the GCL, the barrier performance of the GCL was evaluated. The apparent hydraulic conductivity for 60 °C NaCl solution was 3.2 × 10-7 cm / s, and was about seven times higher than that for 20 °C NaCl solution.
Journal
-
- Geosynthetics Engineering Journal
-
Geosynthetics Engineering Journal 22 153-158, 2007
Japan Chapter of International Geosynthetics Society