اثر رس‌های فیبری و املاح بر سرشتی‌های مهندسی خاک‌های نواحی خشک

نویسندگان

دانشگاه صنعتی سیرجان

چکیده

در ایران گستره­ی پهناوری از خاک­ها و آب­ها با شوری مواجه هستند؛ بنابراین سرشتی­های زمین­ساختی خاک­های نواحی خشک و شور برای طرح های مهندسی اهمیت زیادی دارند. در این تحقیق، اثر شوری بر ویژگی­های ژئوتکنیکی خاک­های ریزدانه و درشت­دانه حاوی کانی­های فیبری بررسی شده است. نتایج نشان داد در خاک­های ریزدانه شوری یک عامل فلوکوله (لخته) کننده و در خاک­های درشت­دانه معمولاً یک عامل پراکنده کننده بوده است. به طور کلی، شوری پارامترهای مقاومت خشک را افزایش و رطوبت بهینه را کاهش می­دهد. اما تغییرات بر اساس نوع کانی­ و اندازه ذرات متفاوت هستند.     

کلیدواژه‌ها


عنوان مقاله [English]

Effect of palygorskite and soluble salts on engineering characteristics of arid region soils

چکیده [English]

In Iran, a large extent of the soils and water are facing with salinity; so the geotechnical properties of arid and saline soils are important for engineering design. In this study, the effects of salinity on geotechnical properties of fine-grained and coarse-grained soils containing fibrous clay minerals have been studied. The results showed that salinity was mostly a flocculated agent in fine-grained soils while in coarse-grained soils, it is usually a dispersing factor. In general, salinity increased dry strength parameters and decreased the optimum moisture content. But changes according to the type of clay mineral and particle size, distribution were different.

کلیدواژه‌ها [English]

  • arid region soils
  • salinity
  • fibrous minerals
  • geotechnical properties
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