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هشتمین کنگره بین المللی عمران شیراز
جزئیات رویداد
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همایش ، رویداد ، ژورنال
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  • stabilizing landfill clays with phosphorus treatment; a case study

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1272
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
    due to their high buffering potential and very low permeability, cohesive soils are frequently used as waterproof- elements in landfill projects. however, stabilization of such clayey barriers has been a major issue in adapting cost-effective methods to enhance soil stability. therefore, it was deemed worth investigating the effect of di-ammonium phosphate (dap) solutions compromised the majority part of phosphorus fertilizers to improve geotechnical properties of hamedan’s clayey landfill barrier (located in the west part of iran). a series of contaminated specimens were prepared by mixing sampled clays with industrial dap in concentrations ranging from 0.01 to 0.1mole/l. the conventional geotechnical experiments such as compaction, unconfined compressive strength, and direct shear box were then performed. findings indicate that: increasing phosphorus ion concentration in the specimens improves cohesion (by 24%), and unconfined compressive strength (by 12%), and decrease internal friction angle (by 11.78%) and maximum dry density (by 1.5%). accordingly it could be deduced that leaching phosphorus ion through landfill blanket has a noticeable effect on the stability of the hamedan’s landfills.

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