تاثیر ذرات گرانول لاستیک بازیافتی بر روی ویژگی های ژئوتکنیکی خاک رس

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه مهندسی عمران، دانشگاه آزاد اسلامی، واحد تبریز، تبریز

10.22084/nfag.2019.16992.1328

چکیده

بهسازی و تقویت خاک­های مساله­دار از نظر ویژگی­های ژئوتکنیکی نیازمند استفاده از مصالح مناسب است. بنابراین خرده­های لاستیک می­تواند بعنوان یک گزینه پیشنهادی جدید، در این خصوص مطرح شود. از سوی دیگر، امروزه دفع لاستیک­های فرسوده یکی از معضلات و مسائل اساسی از نظر محیط­زیست می­باشد. لذا در تحقیق حاضر به بررسی بهبود توانایی باربری خاک رس کائولن همراه با مخلوط ذرات زائد لاستیک­های فرسوده (باهدف کاهش آلاینده­های زیست­محیطی) بر اساس آزمون­های آزمایشگاهی پرداخته شده است. ذرات گرانول لاستیک بازیافتی در قطرهای 1 ،3 و 5 میلی­متر با درصدهای 5/2، 5، ، 5/7 و10 با خاک رس مخلوط شدند. جهت بررسی رفتار ژئوتکنیکی خاک رس تثبیت شده، آزمون­های تراکم، مقاومت فشاری تک­محوری، برش مستقیم و نفوذپذیری بر روی نمونه­ها انجام گرفت. نتایج بدست آمده از تحقیق حاضر نشان داد، میزان بهینه اندازه ذرات گرانول لاستیک و مقدار آن­ها در خـاک رس به تـرتیب برابر 1 میلی­متر و 5/2 درصد می­باشد. این مقادیر باعث کاهش قابل­توجه نسبت تخلخل حداقل در خاک رس تثبیت شده گردیده است. نتیجه آن، افزایش توانایی باربری، تراکم پذیری می­باشد. از سوی دیگر، افزودن ذرات گرانول لاستیک بازیافتی در تمامی ابعاد و درصدهای وزنی در خاک رس سبب افزایش میزان نفوذپذیری گردید. 

کلیدواژه‌ها


عنوان مقاله [English]

Effects of Waste Tire Granule Particles on Geotechnical Properties of Clay Soil

نویسندگان [English]

  • H. Bagheri
  • R. Dabiri
چکیده [English]

For improvement and stabilization of problematic soils in terms of geotechnical properties, it should be required to use proper materials. Therefore, tire chips is as new option can be suggested. On the other side, disposing of waste tire is one of the environmental problems. In present study, improving bearing capacity of kaolinite clay soil with using granule particle of tire waste (with aim of reducing environmental pollutants) based on laboratory tests have been investigated. Waste tire Granule particles in 1, 3 and 5 mm diameters and 2.5, 5, 7.5 and 10 percentage were mixed with clay. For evaluating geotechnical properties of stabilized clayey soil, compaction, uniaxial, direct shear and permeability tests were performed. Results of this study showed that, optimum of particle size and waste tire particle content are respectively 1 mm and 2.5 percentage (by weight). So that, in this values minimum void ratio significantly decreased in improved specimens. Consequently, bearing capacity and compressibility were growth. Also, with adding waste tire granule particle by a size larger than 1 mm and more 2.5 % content in improved soil, permeability went up.   

کلیدواژه‌ها [English]

  • Kaolinite clay soil
  • Waste tire granule
  • Environmental geotechnics
  • Improvement
  • Geotechnical properties
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