بررسی امکان استفاده از نانو ذرات رس برای کنترل پتانسیل واگرایی خاک‌های رسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 موسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج ، ایران

2 دانشجو/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

موضوعات


عنوان مقاله [English]

Application of Nano-clay particles for stabilization of dispersive clayey soils

نویسندگان [English]

  • Nader Abbasi 1
  • Arash Farjad 2
1 Institute of Technical Research and Agricultural Engineering
2 Islamic 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
Abbasi, N. (2011). The role of anions in dispersion potential of clayey soil. Journal of Agricultural Engineering Research, 12(3), IAERI, pp. 15-30 (In Farsi)
Abbasi, N. and Nazifi, M.H., (2013), “Assessment and modification of Sherard chemical method for evaluation of dispersion potential of soils”, Journal of Geotechnical and Geological Engineering, 31(1), 337-346.
Anon, (2000). Annual Book of ASTM Standards. Vol. 04.08, Soil and Rock, ASTM D4647
Askari, F. and Fakher, A. (1993). Swelling and dispersivity of soils: from geotechnical engineer point of view. University of Tehran Press. (In Farsi)
Hieu, P. and  Nguyen, Q. P., (2014). Effect of silica nanoparticles on clay swelling and aqueous stability of nanoparticle dispersions. Journal of Nanoparticle Research. 16(1).
Huang, T. (2011).Clay Stabilization with Nanoparticles. Patent No. US 20110000672 A1. US 12/277,825
Goodarzi, A.R. and Salimi, M. (2015). Stabilization treatment of a dispersive clayey soil using granulated blast furnace slag and basic oxygen furnace slag. Journal of Applied Clay Science, Vol. 108, 61-69.
Majeed, Z.H. and Taha, M.R. (2012). Effect of nanomaterial treatment on geotechnical properties of a penang soil. Journal of Asian Scientific Research, 2(11), 587-592.
Majeed, Z.H. and Taha, M.R. (2013). A review of stabilization of soils by using nanomaterials. Australian. Journal of Basic and Applied Sciences, 7(2), 576-581.
Majeed, Z.H., Taha, M.R. and Jawad, I.T. (2014). Stabilization of soft soil using nanomaterials. Research Journal of Applied Sciences, 8(4), 503-509.
Makusa, G. P. (2013). Soil Stabilization methods and materials in engineering practice. Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology.
Middleton, H.E. (1930). Properties of soils which influence soil erosion. United States Department of Agriculture. Bulletin. 178.
Mohammadi, M. and Niazian, M. (2013). Investigation of nano-clay effect on geotechnical properties of rasht clay. International Journal of Advanced Scientific and Technical Research, 3(3). 37-46.
Movahedan, M., Abbasi, N., and M. Keramati. 2011. Experimental investigation of polyvinyl acetate polymer application for wind erosion control of soils. Journal of Water and soil (Agricultural Science and Technology) , 25( 2), 606-616.
Movahedan, M., Abbasi, N., and M. Keramati. 2012. Wind erosion control of soils using polymeric materials. Eurasian Journal of Soil Science. 1(2), 81 –86.
Neethu, S.V. and Remya, S. (2013). Engineering behaviour of nanoclays stabilized soil. In: Proceedings of Indian Geotechnical Conference, 22-24 December, Roorkee University, 17 4 TH-13.
Ouhadi, V.R. and Amiri, M. (2011). Geo-environmental behavior of nanoclays in interaction with heavy metal contaminants. Journal of Civil and Environmental Engineering, 42(3), 29-36.
Ouhadi, V.R. and Goodarzi, A.R. (2006). Assessment of the stability of a dispersive soil treated by alum. Journal of Engineering Geology, Vol. 85, 91-101.
Rahimi H., N. Abbasi. (2008). Failure of Concrete Canal Lining on Fine Sandy Soils (A case study for Saveh Project). J Irrig Drain Eng. 57, 83-92
Rahimi, H. and Abbasi, N. (2015). Geotechnical engineering: problematic soils. University of Tehran Press. (In Farsi)
Rahimi, H. and Delfi, M. (1993). New chemical method for valuation of soil dispersivity. 2nd. Int. Conf. of soil Mech. and Found. Eng., Tehran, Iran.
Richards, K.S. (2012). Internal erosion-potential failure modes. Federal Energy Regulatory Commission Report, Feb., No. 31.
Sherard, J.L., Dunnigan, L.P. and Decker, R.S. (1976). Identification and nature of dispersive soils. Journal of Geotechnical Division, Proceeding ASCE, 102, 287-301.
Sparks, Donald.  2000. Soil Physical Chemistry. CRC Press, Florida, 33431.
Taha, M.R. and Taha, O.M.E. (2012). Influence of nano-material on the expansive and shrinkage soil behavior. Journal of Nanopart Res, 14(10), 1190.
Turkoz, M., Savas, H., Acaz, A. and Tosum, H. (2014). The effect of magnesium chloride solution on the engineering properties of clay soil with expansive and dispersive characteristics. Applied Clay Science, 101, 1-9.
Volk, G.M. (1937). Method of Determination of Degree of Dispersion of the Clay Fraction of Soils. In: Proceedings of Soil Science Society of America, 2, 561-567.