تأثیر فرایند تثبیت ترکیب آهک و نانوسیلیس بر مقاومت فشاری و وارفتگی خاک‌های مارنی در حالت اشباع

نوع مقاله : یادداشت پژوهشی

نویسندگان

گروه مهندسی عمران، دانشکده مهندسی، دانشگاه هرمزگان

چکیده

خاک­ های مارنی در حالت خشک دارای مقاومت نسبتاً خوبی هستند اما این خصوصیات در تماس با آب دچار افت زیادی می­شود. عدم شناخت رفتار خاک ­های ریزدانه رسی و به­ خصوص مارن­ ها می­تواند سازه ­ها و بناهای ساخته ­شده بر روی چنین خاک­ هایی را دچار چالش اساسی نماید. براین اساس هدف از پژوهش حاضر بررسی مشخصات ژئوتکنیکی خاک­ های مارن و ارائه راهکار جهت بهبود رفتار وارفتگی و خصوصیات مهندسی این خاک ­ها در حالت اشباع است. در این راستا برای دست یافتن به اهداف این پژوهش، به بررسی تأثیر افزودن آهک و ترکیب آهک و نانوسیلیس بر ویژگی­ های ژئوتکنیکی خاک (حدود اتربرگ، مقاومت فشاری، رسوب و وارفتگی) با توجه به زمان عمل­ آوری نمونه ­ها پرداخته شده است. براساس نتایج مقاله حاضر افزودن آهک و نانوسیلیس به خاک مارن منجر به کاهش شاخص پلاستیسیته خاک مارن شده است. با توجه به نتایج آزمایش وارفتگی، افزودن بیش از 7/0% نانوسیلیس به خاک مارن حاوی 2% آهک، مانع فروپاشی و گسیختگی نمونه در آب شده است. همچنین نتایج آزمایش­ های مقاومت فشاری محدود نشده نشان می­دهد، حضور 6 درصد آهک با 7/0 درصد نانوسیلیس در زمان عمل­آوری 28 روزه، مقاومت فشاری نمونه را به kg/cm22/14 رسانده است که نسبت به خاک طبیعی حدود 90% افزایش یافته است.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Lime and Nanosilica Stabilization Process on Compressive Strength and Slake of Marly Soils in Saturated State

نویسندگان [English]

  • Adel Asakereh
  • Mohammad Amiri
  • Halimeh Zarei
Department of Civil Engineering, Faculty of Engineering, University of Hormozgan, Bandarabbas, Iran
چکیده [English]

Marly soils have a relatively good resistance in the dry state, but these characteristics tend to significant degradation in contact with water (Ouhadi & Yong, 2003, Hosseini et al. 2012). The Failure to identify the behavior of clayey fine-grained soils, and especially marls, can challenge the structures constructed on such soils. Because of the extent and distribution of this type of soil in many regions of Iran, especially in southern Iran, and the high potential for the construction of hydraulic structures in these areas, it is necessary to study the behavior of these soils. Accordingly, the purpose of this study is to investigate the geotechnical characteristics of marl soils and provide a solution for improving the engineering properties of these soils.

کلیدواژه‌ها [English]

  • Marl
  • lime
  • nanosilica
  • Macrostructural behavior
  • unconfined compression strength
Abdelzaher EA, Mostafa, Mohamed S, Ouf and Mokhtar F Elgendy, “Stabilization of Subgrade Pavement Layer Using Silica Fume and Nano Silica”, International Journal of Scientific & Engineering Research, 2016, 7 (3), 573-581.
Aghanabati A, “Geological Engineering”, Geological Survey and Mineral Exploration, Tehran, Iran, 2004, (In Persian).
Al-Mukhtar M, Lasledj A and Alcover J, “Behaviour and mineralogy changes in lime-treated expansive soil at 20 °C”, Applied Clay Science, 2010, 50 (2), 191-198.
Al-Rawas AA, Hago AW, Al-Sarmi H, “Effect of lime, cement and Sarooj (artificial pozzolan) on the swelling potential of an expansive soil from Oman”, Building and Environment, 2005, 40 (5), 681-687.
Amiri M, Asakereh A, Farokhdel AH, “The Effect of Combined Nanosilica and Lime on the Improvement of the Marl Soil Engineering Properties”, Journal of Ferdowsi Civil Engineering, 2019, 32 (1), 35-54. (In Persian).
Anagnostopoulos CA, “Strength properties of an epoxy resin and cement-stabilized silty clay soil”, Applied Clay Science, 2015, 114, 517-529.
ASTM C25-99, “Quicklime and Hydrated Lime”, Standard Test Methods for Chemical Analysis of Limestone, 1999.
Broms B, Bengt, “Ground Improvement”, John Wiley and Sons publishing company, 1993.
Changizi F, Haddad A, “Strength Properties of Soft Clay Treated with Mixture of Nano-SiO2 and Recycled Polyesterfiber”, Journal of Rock Mechanics and Geotechnical Engineering, 2015, 7, 367-378.
Consoli NC, Prietto PDM, da Silva Lopes L & Winter D, “Control factors for the long-term compressive strength of lime treated sandy clay soil”, Transportation Geotech, 2014, 1, 129-136.
Eades JL, Grim RE, “Reaction of hydrate lime with pure clay minerals in soil stabilization”, Highway Research Board Bulletin, 1960, 262, 51-63.
Elert K, Nieto F, Azañón JM, “Effects of lime treatments on marls”, Applied Clay Science, 2017, 135, 611-619.
Fahimifar A, Soroush H, “Rock Technics Test”, Theorectical Aspects and Standards, Tehran, Iran, 2002, Volume 1 (In Persian).
Goodarzi A, Moradloo A, “Effect of curing temperature and SiO2-nanoparticles on the engineering properties of lime treated expansive soil”, Modares Civil Engineering Journal, 2017, 17 (3), 132-144, (In Persian).
Ghasabkolaei N, Janalizadeh Choobbasti A, Roshan N, and Ghasemi SE, “Geotechnical properties of the soils modified whit nanomaterials: A comprehensive review”, Archives of Civil and Mechanical Engineering, 2017, 17 (3), 639-650.
Ghobadi MH, Mohseni H, Karami R, “Study of geological engineering characteristics of Gachsaran Formation in Ramhormoz area, East of Khuzestan”, Journal of Advanced Applied Geology, 2014, 3 (1), 1-12, (In Persian).
Hosseini M, Ali Panahi B, Senmari S, “Estimation of marl stone engineering properties using punch test”, Quarterly Journal of Applied Geology, 2012, 8 (4) 309-322 (In Persian).
Mahouti M, Katebi H, “Classification of Carbonated Soils from Geotechnical Point of View (Case study: Marly Soils of Tabriz)”, Journal of Civil and Environmental Engineering, University of Tabriz, 2018, 48 (3), 51-59 (In Persian).
Mannual Book of ASTM Standards, in: American Society for Testing and Materials, Philadelphia, 1992.
Nelson DW and Sommers LE, “Total Carbon, Organic Carbon, and Organic Matter”, American Society of Agronomy, Soil Science Society of America, 1996, 961-1010.
Ouhadi VR, Yong RN, “The Role of Clay Fractions of Marly Soils on their Post Stabilization Failure”, Engineering Geology, 2003, 70 (3), 365-375.
Ouhadi VR, Yong RN, Amiri M and Ouhadi MH, “Pozzolanic Consolidation of Stabilized Soft Clays”, Applied Clay Science, 2014, 95, 111-118.
Oates AH, “Lime and Limestone”, John Wiley and Sons publishing company, 1998.
Ouhadi VR, Amiri M, and Hamidi S, “Dispersive soil improvement with lime, special attention to the reduction of peak intensity of clay minerals in XRD analysis”, Modares Civil Engineering Journal, 2014, 14 (2) 13-25 (In Persian).
Ouhadi VR, Amiri M, Zangeneh M, “Microstructural Assessment of Lime Consumption Rate and Pozzolanic Reaction Progress of a Lime-Stabilized Dispersive Soil”, Modares Civil Engineering Journal, 2016, 16 (1) 11-22 (In Persian).
Ouhadi VR, YongRN, “Experimental study on instability of bases on natural and lime/cement- stabilized clayey soils”, Applied Clay Science, 2007, 35 (3-4), 238-249.
Ouhadi VR, Hamidi S, Amiri M, “Impact of Heavy Metal Contaminants on Coefficient of Variations of Compression Index, Expansion Index and Permeability Coefficient of Bentonite from Micro-Structural Point of View”, Journal of Civil and Environmental Engineering, University of Tabriz, 2016, 45 (4), 7-17, (In Persian).
Pettijohn FJ, “Sedimentary rock”, Harper and Row, New York, 1975.
Sol-Sánchez M, Castro J, Ureña CG, Azañón JM, “Stabilisation of clayey and marly soils using industrial wastes: pH and laser granulometry indicators”, Engineering Geology, 2016, 200, 10-17.
Sokouti R, Razagi S, “Erodibility and loss of marly drived soil”, Eurasian Journal of Soil Science, 2015, 4 (4), 279-286.
Vakili A, Narimousa R, Salimi M, Farhadi MS, “Effect of freeze-thaw cycles on characteristics of marl soil treated by electro osmosis application”, Cold Regions Science and Technology, 2019, 167, 102861.
Wood LE, Deo P, “Observation on orientation and hardness variations”, Am Miner, 1975, 31 (3-4), 149-152.
Zhang G, “Soil nanoparticles and their influence on engineering properties of soils”, Advances in Measurement and Modeling of Soil Behavior, New Peaks in Geotechnics, ASCE, 2007.
Zhang GT, Germaine AJ, Whittle C, Ladd CC, “Index properties of a highly weathered old alluvium”, Geotechnique, 2004, 54 (7), 441-451.