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بررسی امکان استفاده از نانو ذرات رس برای کنترل پتانسیل واگرایی خاک‌های رسی | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 5، دوره 48، شماره 3، مهر 1396، صفحه 515-524 اصل مقاله (512.93 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2017.63418 | ||
| نویسندگان | ||
| نادر عباسی* 1؛ آرش فرجاد2 | ||
| 1موسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج ، ایران | ||
| 2دانشجو/دانشگاه آزاد اسلامی واحد تهران مرکزی | ||
| چکیده | ||
| با توجه به پیشرفت‌های حاصل در تهیه و کاربرد نانومواد، استفاده از این نوع مواد در علوم مختلف به‌ویژه مهندسی ژئوتکنیک موردتوجه قرار گرفته است. در این پژوهش، اثر افزودن مقادیر مختلف نانورس بر روی پتانسیل واگرایی دو نوع خاک رسی با خاصیت خمیری کم و زیاد بررسی شده است. بدین منظور، ابتدا آزمایش‌های شناسایی بر روی دو نوع خاک رس و نانورس و سپس آزمایش‌های پین هول بر روی نمونه‌های خاک با مقادیر مختلفی نانورس شامل؛ صفر (خاک طبیعی)، 25/0، 5/0، 1، 2 و 4 درصد وزنی خاک با در نظر گرفتن سنین عمل‌آوری 1، 3 و 7 روز انجام گردید. نتایج آزمایش‌های انجام‌شده نشان دادند که افزودن نانورس به خاک رس واگرا به‌طور کلی موجب کاهش پتانسیل واگرایی خاک می‌گردد. در بررسی تأثیر این ذرات بر روی دو نوع خاک با خمیرایی مختلف نتیجه گردید که تأثیر آن بر هر دو نوع خاک یکسان بوده و خمیرایی خاک نقش مهمی در تأثیر این ذرات بر پتانسیل واگرایی ندارند. همچنین مشخص گردید زمان عمل‌آوری نقش قابل‌ملاحظه‌ای در تثبیت خاک با نانوذرات رس داشته و برای انجام فعل انفعالات شیمیایی موردنیاز برای تثبیت حدود سه روز زمان لازم است. | ||
| کلیدواژه‌ها | ||
| پین هول؛ تثبیت خاک؛ واگرایی؛ نانورس | ||
| عنوان مقاله [English] | ||
| Application of Nano-clay particles for stabilization of dispersive clayey soils | ||
| نویسندگان [English] | ||
| Nader Abbasi1؛ Arash Farjad2 | ||
| 1Institute of Technical Research and Agricultural Engineering | ||
| 2Islamic Azad University, Tehran Branch | ||
| چکیده [English] | ||
| Recently, due to improvements and progresses in nanotechnology, application of Nano particles in different sciences especially geotechnical engineering have been widely considered. In this research, the effect of different amounts of Nano clay on dispersivity potential of two clayey soils with low and high plasticity has been studied. For this purpose, first identification tests were implemented on clayey soils and Nano clay and then pinhole tests conducted on specimens of soils with different amounts of Nano clay particles including ; 0, 0.25, 0.5, 1, 2 and 4 percent by weight for evaluation of their dispersivity potential. The specimens were cured for 1, 3 and 7 days. The results indicated that that the addition of Nano clay particles could reduce dispersive potential of clayey soil considerably. It is also found that the effect of Nano particles on two clayey soils with different plasticity is the same and the plasticity characteristics have no important role in chemical reaction between Nano clay particles and clay minerals. Furthermore, curing time was found to be as a main factor in stabilization of clayey soils with Nano particles. | ||
| کلیدواژه‌ها [English] | ||
| Pinhole, ُخهم Stabilization, Dispersivity, Nanoclay | ||
| مراجع | ||
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