• effect of freeze-thaw cycles on the hydraulic conductivity of a compacted clayey soil from nazlou region of urmia city, iran, and on a geosynthetic clay liner

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/11/15
    • تاریخ انتشار در تی پی بین: 1390/11/15
    • تعداد بازدید: 598
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the effect of freeze-thaw cycles on the hydraulic conductivity (hc) of compacted clay liner (ccl) and geosynthetic clay liners (gcls) in water retaining structures and municipal solid waste landfills is a key issue in designing barrier systems in those structures. in this study the effect of freeze-thaw cycles on the hydraulic conductivity of a compacted clayey soil from nazlou region of urmia city and a geosynthetic clay liner; and the effect of effective stress on the hydraulic conductivity change of clayey soil in freeze-thaw cycles was investigated. the flexible-wall triaxial hydraulic conductivity apparatus was used to measure the hc of specimens subjected to freeze-thaw. during the freezing process ice lenses grow in soil sample and when the ice lenses melt, a network of cracks is left and thus the hc increases. increasing the effective stress reduces the increased hydraulic conductivity due to freeze-thaw. the results show that on the contrary to compacted clayey soil, the application of freeze-thaw cycles do not significantly affect the hc of gcl even when gcl sample is subjected to extreme climatic conditions during which it continues to exhibit good performance as a hydraulic barrier.

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