بررسی اثر افزودن اتیلن-وینیل استات بر پارامتر‌های مقاومت خاک دانه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده فنی و مهندسی، دانشگاه صنعتی قم، قم، ایران

چکیده

بهسازی خاک‌ها از دیرباز نقش مهمی در علوم عمرانی به خصوص در علم ژئوتکنیک ایفا کرده‌ است لیکن با گذشت زمان و کمبود زمین‌های مقاوم جهت احداث سازه‌های عمرانی پیشرفته‌تر، مهندسین این حوزه بر آن شدند تا روش‌های نوینی در جهت تثبیت و تسلیح خاک‌های مسئله‌دار به کار گیرند. هم‌چنین در سال‌های اخیر با توجه به مشکلات زیست‌محیطی هم‌چون افزایش زباله و ضایعات صنعتی و رها شدن آن‌ها در محیط زندگی افراد، مشکلاتی را برای حیات موجودات زنده به وجود آورده است. در چنین شرایطی مهندسین حوزه ژئوتکنیک تلاش نموده‌اند، با به کارگیری این مواد در پروژه‌های عمرانی، حفاظتی از محیط‌زیست به عمل آید و علاوه بر آن با توجه به هزینه‌های بسیار ناچیز مواد ضایعاتی، باعث کاهش هزینه‌های اقتصادی پروژه‎‌های بهسازی خاک نیز بشوند. در نتیجه در این پژوهش، به تسلیح خاک دانه‌ای در دو حالت سست و نیمه متراکم با استفاده از ماده ضایعاتی صنعتی پلیمری با نام کامل اتیلن-وینیل استات (EVA) پرداخته شده است. آزمایش‌‌ها در درصد‌های مختلف وزنی EVA (0، 0/2، 0/5، 0/75، 1، 1/25، 1/5، 1/75، 2، 2/25،2/5، 3 و 4)، بدون افزودن رطوبت و با استفاده از دستگاه CBR صورت گرفته ‌است. نتایج نشان می‌دهد CBR خاک با استفاده از این مواد افزودنی به طور قابل توجهی افزایش پیدا کرده و تاثیر آن با کاهش وزن مخصوص خاک، بر روی خاک بیشتر می‌شود. هم‌چنین مقدار بهینه مواد افزودنی در حالت سست و نیمه متراکم به ترتیب 2% افزودنی و 1% افزودنی می‌باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of the addition of ethylene-vinyl acetate on granular soil strength parameters

نویسندگان [English]

  • Mahsa Miri
  • Masoud Amelsakhi
  • Morteza Jiryaei Sharahi
Civil Engineering Department, Faculty of Engineering, Qom University of Technology, Qom, Iran
چکیده [English]

Soil improvement has long played an important role in civil sciences, especially in geotechnics. However, with the passage of time and the lack of resilient lands for the construction of more advanced construction structures, engineers in this field decided to use new methods to stabilize and reinforce problematic soils. Also in recent years, environmental problems such as the increase of waste and industrial waste and their release into the living environment have created problems for the life of living Creatures. In these circumstances, geotechnical engineers have tried to use these materials in construction projects to protect the environment and, also, due to the very low cost of waste materials, reduce the economic costs of soil improvement projects. As a result of this study, granular soil is reinforced in two loose and semi-dense states using Polymeric industrial waste material called full ethylene-vinyl acetate (EVA). The experiments were performed at different weight percentages of EVA (0, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3 and 4), without adding moisture and using the CBR device. The results show that soil CBR has increased significantly with the use of these additives, and its effect on the soil increases with the reduction of the specific weight of the soil.

کلیدواژه‌ها [English]

  • Soil improvement
  • Granular soil Reinforcement
  • Ethylene-vinyl acetate (EVA)
  • Waste material
  • Environment
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