نانو اکسید منیزیم یک تثبیت کننده سبز کم کربن برای تثبیت خاک های حاوی پسماند جامد شهری
محورهای موضوعی : تحقیقات در علوم مهندسی سطح و نانو مواد
1 - گروه مهندسی عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
2 - گروه مهندسی عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
کلید واژه: نانواکسیدمنیزیم, تثبیت خاک, درشت ساختاری, ریزساختاری,
چکیده مقاله :
این تحقیق با هدف کمک به محیط زیست بوسیله مواد نانو جهت افزایش مقاومت خاک های حاوی پسماند جامد شهری می باشد. نانومواد به دلیل ماهیت غیرسمی و مصرف انرژی کمتر موردنیاز برای تولید، در مهندسی ژئوتکنیک و ژئومحیط زیست پذیرفته شده اند. از این رو در این مطالعه چهار درصد مختلف از نانواکسیدمنیزیم (25/.، 5/.، 75/. و 1) به¬عنوان یک ماده تثبیت¬کننده در خاک های حاوی درصد مختلف از پسماندجامدشهری (15، 25، 35 و 45%) مورد استفاده قرار گرفته است. نتایج آزمون مقاومت فشاری در حالت خشک و در سیکل های تر و خشک نشان می دهد که، نمونه های حاوی 15% پسماند که با 1% نانواکسیدمنیزیم تثبیت شده اند می توانند دوام و رفتار مقاومتی بهتری را نشان دهند. این نتیجه از دید آزمون میکروسکوپ الکترونی نیز با تشکیل ساختار فلوکه شده مورد تایید قرار گرفت. از این رو استفاده از نانواکسیدمنیزیم در خاک های حاوی پسماندجامدشهری با مقدار بهینه می تواند در حل مشکلات خاک مؤثر واقع شود.
This study aims to help the environment with nano materials to increase the strength of soils containing municipal solid waste. Nanomaterials have been accepted in geotechnical and geo-environmental engineering due to their non-toxic nature and less energy consumption required for production. Therefore, in this study, four different percentages of Nano-MgO (0.25, 0.5, 0.75 and 1%) as a stabilizer in soils containing different percentages of municipal solid waste (15, 25, 35 and 45%) has been used. The results of the unconfined compressive strength test in dry state and in wet and dry cycles show that the specimens containing 15% waste which are stabilized with 1% Nano-MgO can show better durability and strength behavior. This result was also confirmed by the scanning electron microscope test with the formation of a flocculated structure. Therefore, the use of Nano-MgO in soils containing municipal solid waste with an optimal amount can be effective in solving soil problems.
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