تاثیر آلاینده اسید نیتریک بر روی مقاومت برشی خاک ریزدانه | ||
| پژوهش های زیرساخت های عمرانی | ||
| دوره 10، شماره 1 - شماره پیاپی 18، خرداد 1403، صفحه 33-47 اصل مقاله (1.79 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22091/cer.2023.9393.1479 | ||
| نویسندگان | ||
| سیدمحمدحسین خاتمی1؛ عبدالحسین حداد* 2؛ عادل عساکره3 | ||
| 1گروه مهندسی عمران، دانشگاه فنی و حرفه ای، تهران، ایران. | ||
| 2استاد، دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران. | ||
| 3دانشیار، دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران. | ||
| چکیده | ||
| با توجه به رشد روزافزون آلودگی فسیلی در هوای کلان شهرها یا هر نقطه دیگری، باران به‌وجود آمده به صورت اسیدی خواهد بود. از طرفی به دلایل استفاده زیاد از مخلوط ماسه و بنتونیت در مراکز دفن زباله و وجود شیرابه در آن، بررسی رفتار این خاک ها تحت اثر آلاینده اسیدی دارای اهمیت زیادی می باشد. به این منظور، اثر آلاینده اسید نیتریک با pH های 7، 3 و 1 بر روی مقاومت برشی ماسه تمیز و ماسه حاوی 10 درصد وزنی بنتونیت متراکم به کمک آزمایش های سه محوی تحکیم یافته – زهکشی نشده بررسی گردید. نتایج به دست آمده نشان می‌دهند که حضور اسید در آب منفذی، باعث کاهش مقاومت برشی ماسه تمیز می‌شود. در مخلوط ماسه و بنتونیت حضور اسید نیتریک با pH=3 منجر به افزایش مقاومت برشی و با pH=1 باعث کاهش مقاومت برشی می‌گردد. همچنین حضور اسید باعث کاهش مدول الاستیسیته و افزایش فشار آب حفره‌ای منفی می‌گردد. | ||
| کلیدواژه‌ها | ||
| آزمایش سه محوری؛ پارامترهای مقاومت برشی؛ آلاینده اسیدی؛ مخلوط ماسه و بنتونیت | ||
| عنوان مقاله [English] | ||
| Investigation of Acid Effect on the Strength Behavior of Fine-Grained Soil | ||
| نویسندگان [English] | ||
| Seyyed mohammad hosein Khatami1؛ Abdolhosein Haddad2؛ Adel Asakereh3 | ||
| 1Department of Civil Engineering, Technical and Vocational University (TVU), Tehran, Iran | ||
| 2Professor, Faculty of Civil Engineering of Semnan University, Semnan, Iran. | ||
| 3Associate Professor, Faculty of Civil Engineering of Semnan University, Semnan, Iran. | ||
| چکیده [English] | ||
| Due to the ever-increasing growth of fossil pollution in the air of big cities or any other place, the resulting rain will be acidic. The reason for the formation of acid rain particles is nitrogen group compounds. That is, the combination of existing water with nitrate causes the phenomenon of acid rain. The soil may be exposed to various pollutants over time, including acidic pollutants and its shear resistance changes.Therefore, this issue is investigated in this research. On the other hand, investigating the behavior of soil under the effect of acidic contamination is so important because the excessive using of the sand-bentonite mixture in the Landfills. According to this subject in this research Sand of Firoozkooh with different percentages (0, 10%) Bentonite to carry out the undrained consolidated triaxial tests is use to investigate the effect of nitrat acid solution with (1,3)pH for investigating the influence of acidic contamination on shear strength parameter. Results that comes out from experiments indicates that Presence of acid lead to reduction of shear strength of clean sand. Although in sand-bentonie mixture with pH=3 shear strength increased but rising of acid in pH=1 lead to decrease of shear strength. Also presence of acid make the positive pore pressure higher. | ||
| کلیدواژه‌ها [English] | ||
| static triaxial test, shear strength parameters, acidic contamination, sand-bentonite mixture | ||
| مراجع | ||
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