استفاده از خاکستر باگاس نیشکر و آهک برای تثبیت خاک های رسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 1- دانش آموخته کارشناشی ارشد رشته مهندسی عمران خاک وپی، دانشگاه ازاد اسلامی واحد تهران مرکزی

2 عضو هیئت علمی موسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی

3 دانشکده مهندسی عمران ، دانشگاه ازاد اسلامی واحد تهران مرکزی

چکیده

باگاس یکی از پسماندهای کشاورزی در کشت و صنعت‌های نیشکر و صنایع جانبی است که نگهداری و مدیریت آن معمولاً مشکلاتی را برای متولیان این شرکت‌ها به وجود می‌آورد. در این تحقیق، تأثیر خاکستر باگاس نیشکر و آهک بر مقاومت فشاری خاک رسی بررسی شده است. بدین منظور، با افزودن مقادیر مختلفی از خاکستر باگاس نیشکر شامل؛ 2، 5، 8 و 12 درصد و آهک شامل؛ 1، 3 و 4 درصد به خاک رسی، 20 نوع مخلوط ساخته شد. مشخصات تراکمی هر یک از مخلوط‌ها با استفاده از آزمایش تراکم استاندارد و سپس تراکم هاروارد تعیین شد. با در نظر گرفتن دو سن عمل‌آوری (7 و 28 روزه) و سه تکرار، 6 نمونه آزمایشی از هر مخلوط و در مجموع 120 نمونه آزمایشی با استفاده از قالب هاروارد تهیه شد و پس از عمل‌آوری در سنین مورد نظر، مورد آزمایش‌های مقاومت فشاری محصور نشده قرار گرفتند. نتایج به دست آمده از این پژوهش نشان می‌دهد که با افزایش مقدار خاکستر باگاس نیشکر و آهک به خاک رسی، وزن واحد حجم خشک کاهش و رطوبت بهینه افزایش یافته است. ترکیب 8 درصد خاکستر باگاس نیشکر با خاک رسی، باعث افزایش 92 درصدی مقاومت فشاری خاک شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Stabilization of clayey soils using Bagasse fly ash and lime

نویسندگان [English]

  • Abdolmajid Karimi 1
  • Nader Abbasi 2
  • Mehdi Siavoshnia 3
1 Islamic Azad University, Tehran Branch
2 Agricultural Engineering Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj
3 Department of Technology and Engineering, Islamic Azad University of Central Tehran Branch, Tehran, Iran
چکیده [English]

Sugarcane bagasse is one of the agro-industry wastes that its maintenance and disposal makes some problems for the factories managers. In this research, the effects of lime and bagasse fly ash on the strength characteristics of a clayey soil were studied. For this purpose, 20 treatments were made by adding of different amounts of lime and bagasse fly ash to a high plastic clayey soil. In such a way four levels of lime including 0, 1, 3 and 4percent and five levels of bagasse fly ash including 0, 2, 5, 8 and 12 percent by dry weight of soil. In addition and bagasse were added to the soil with percentages of 2, 5, 8 and 12 for bagasse ash. Then, considering two curing times (7 and 28 days) and three replications, 6 specimens for each treatment and totally 120 specimens were made by using of Harward miniature compaction apparatus. The prepared samples were then tested for unconfined compressive strength at their curing ages. The results showed that the adding of Bagasse fly ash and lime increases the optimum water content and reduces maximum dry density of the clayey soil. It is also found Furthermore,The combination of 8% sugarcane bagasse ash with clayey soil has increased the compressive strength of soil by 92%. Moreover, addition of bagasse ash to the mixture of clayey soil-lime reduces the amount of unpressurised compressive strength and of the elastic modulus. According to the experimental mixtures, the combination of 2% sugarcane bagasse ash with 4% lime was obtained as the optimum composition.

کلیدواژه‌ها [English]

  • Soil Stabilization
  • Clay Soil
  • Bagasse ash
  • lime
  • Unconfined Compressive Strength

مراجع

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تحقیقات آب و خاک ایران
دوره 49، شماره 1
فروردین و اردیبهشت 1397
صفحه 1-12

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