بررسی تأثیر خاک‌اره برروی رفتار ژئوتکنیکی خاک‌های رسی

نوع مقاله : پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی-واحد تبریز

2 دانشگاه آزاد اسلامی- واحد تبریز

چکیده

در این پژوهش تأثیر ذرات خاک‌ارۀ درخت کاج برروی خصوصیات ژئوتکنیکی دو نوع خاک رس کائولنی بررسی شده‌است، به‌طوری‌که خاک‌اره با درصدهای وزنی 3، 6 و 9 به‌صورت خشک به دو خاک کائولنی با خصوصیات خمیری مختلف به‌صورت تصادفی مخلوط گردیده‌است. در ادامه، نمونه­های ساخته‌شده تحت آزمایش­های تراکم، تک­محوری، نفوذپذیری (با ارتفاع متغیر)، تحکیم و برش مستقیم (خشک و اشباع) قرار گرفته‌اند. نتایج حاصل از آزمایش­ها نشان می‌دهد، زمانی‌که 3 % خاک‌اره به نمونه­های مورد مطالعه افزوده ­گردد سبب کاهش نسبت تخلخل حداقل (emin) در بین ذرات خاک کائولن با خاصیت خمیری بالا به‌میزان 24 % می‌شود. هم‌چنین در این شرایط افزایش در مقاومت و ظرفیت باربری، تراکم‌پذیری و کاهش جذب آب به‌وقوع می‌پیوندد. 

کلیدواژه‌ها

عنوان مقاله [English]

Effects of Sawdust on Geotechnical Properties of Clayey Soils

نویسندگان [English]

  • Roozbeh Tadayyon 1
  • Rouzbeh Dabiri 2
1 Tabriz Branch-Islamic Azad Unibersity
2 Tabriz Branch-Islamic Azad Unibersity
چکیده [English]

In this research, effects of pine tree sawdust on geotechnical properties of two types of kaolinite clayey soil was evaluated. So that, sawdust in 3, 6 and 9 percent (by weight) in dry condition randomly mixed with two kaolinite clayey soil with different plasticity index. Compaction, uniaxial, permeability (falling head) and consolidation tests were performed on specimen. Results showed while 3% sawdust mixed to samples, 24% minimum void ratio (emin) decreased in kaolinite clay with high plasticity index. Also, in this condition, increasing of bearing capacity and strength, ductility and decreasing in water absorbing have been happened.

کلیدواژه‌ها [English]

  • Clayey soil
  • Sawdust
  • Geotechnical behavior
  • Shear strength
  • Consolidation
  • permeability

مراجع

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