تاثیر زیست محیطی افزودن زئولیت و خاک‌اره بر مقاومت تک ‌محوری خاک ماسه‌ای تثبیت‌ شده با سیمان

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی عمران، دانشگاه صنعتی قم، قم، ایران

چکیده

امروزه با گسترش شهرنشینی، احداث روسازی بر روی خاک بستر سست و ضعیف در برخی مناطق امری اجتناب ‌ناپذیر است. یکی از روش‌های مرسوم و کم‌هزینه جهت بهبود خصوصیات ژئوتکنیکی خاک ماسه‌ای، تثبیت آن به ‌وسیله مصالحی مانند آهک و سیمان است. با توجه به آلودگی‌های ‌زیست‌محیطی حاصل از تولید و مصرف سیمان، استفاده از آن همچنان در پروژه‌های عمرانی از ارکان اصلی به‌ حساب می‌آید. از طرفی انباشت مواد زائد در محیط‌زیست و لزوم دفن آن‌ها در لندفیل‌ها یکی از مشکلات جامعه است. به‌ همین دلیل این پژوهش به‌ دنبال یافتن راه‌حلی برای کاهش مصرف سیمان و همچنین استفاده از مواد زائدی مانند خاک‌اره در بهسازی خاک است. به‌ منظور بررسی تاثیر افزودن زئولیت و خاک‌اره بر مقاومت تک ‌محوری (UCS) خاک ماسه‌ای، مقادیر 4% وزنی سیمان، مقادیر 0، 1، 3 و 5 درصد پودر و الیاف خاک‌اره و مقادیر 0، 10، 30 و 50 درصد جایگزینی زئولیت در زمان عمل‌آوری 7، 14 و 28 روز استفاده شده است. طبق نتایج آزمایش تراکم با افزودن زئولیت و خاک‌اره، رطوبت بهینه خاک افزایش و وزن مخصوص خشک خاک کاهش یافته است. همچنین طبق نتایج آزمایش تک ‌محوری، میزان بهینه جایگزینی زئولیت به‌ جای سیمان در خاک ماسه‌ای، 30% به‌ دست آمده است و با افزایش میزان زئولیت، کرنش گسیختگی نمونه‌ها افزایش یافته است. از طرفی مقاومت تک ‌محوری نمونه‌ها با افزودن 3% پودر خاک‌اره و 1% الیاف خاک‌اره به بیشینه مقدار خود می‌رسد. همچنین کرنش گسیختگی نمونه‌ها با افزایش میزان خاک‌اره افزایش یافته است. نتایج آزمایش‌ها نشان از تاثیر بیشتر الیاف خاک‌اره نسبت به پودر خاک‌اره در بهسازی خاک بوده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Environmental Effect of Adding Zeolite and Sawdust on the Unconfined Strength of Stabilized Soil by Cement

نویسندگان [English]

  • Reza Yousefi
  • Amir Abbas Amooei
  • Abdolreza Karimi
  • Masoud Amelsakhi
Department of Civil Engineering, Faculty of Engineering, Qom University of Technology, Qom, Iran
چکیده [English]

Nowadays unlike decades ago, the environment plays a decisive role in using materials in construction. For example, one considerable part of a project is exploring environmental aspects as a preparatory topic. Chemicals such as cement have been used for decades in construction projects, however chemicals will lead to health catastrophes for both environment and humans consequently. One considerable hitch in human life is waste materials such as sawdust which will jeopardize the environment. One solution to alleviate these problems is using wastes in construction projects as substitution for cement. In this research, sawdust and zeolite were used to decrease cement use on sandy soil's improvement. The amount of materials are as follows: 4% cement (based on main soil weight), 0,1,3 and 5 % sawdust with two different sizes including powder and fibers (as supersede by cement) and 0, 10, 30 and 50 % zeolite as a supersede by cement. Results showed that zeolite and sawdust increase OMC but decrease MDD. Zeolite meets its optimum in 30% and powdered and fibrous sawdust in 3 and 1% subsequently. Finally, rupture strain will experience a sharp increase by enhancing the amount of sawdust. Overall it can be concluded that longer sawdust is more effective than short one.

کلیدواژه‌ها [English]

  • Sandy soil
  • zeolite
  • sawdust
  • Portland cement
  • unconfined compressive strength (UCS)
[1] Shafabakhsh. GH, Sadeghnejad. M, Sajed. Y, Case study of rutting performance of HMA modified with waste rubber powder, Case Studies in Construction Materials, 1 (2014) 69–76.
[2] Ferber. V, Auriol. J. C, Cui. Y. J, Magnan. J. P, On the swelling potential of compacted high plasticity clays, Engineering Geology, 104 (2009) 200–210.
[3] Puppala. A. J, Advances in ground modification with chemical additives: from theory to practice, Transportation Geotechnics, 9 (2016) 123–138.
[4] Hashemian. L, Kavussi. A, Aboalmaali. H, Application of foam bitumen in cold recycling and hydrated lime in airport pavement strengthening, Case Studies in Construction Materials, 1 (2014) 164–171.
[5] Ismail. A. I. M, Ryden. N, The quality control of engineering properties for stabilizing silty nile delta clay soil, Geotechnical and Geological Engineering, 32 (2014) 773–781.
[6] Omar. A. M, Energy use and environmental impacts: A general review, Journal of Renewable and Sustainable Energy, 1(5) (2009).
[7] Owusu. P. A, Sarkodie. S. A, A review of renewable energy sources, sustainability issues and climate change mitigation, Cogent Engineering, 3(1) (2016).
[8] Rosen. M. A, Energy sustainability: A pragmatic approach and illustrations, Sustainability, 1(1) (2006) 55–80.
[9] Ahmadi. P. F, Ardeshir. A, Ramezanianpour A. M, Bayat. H, Characteristics of heat insulating clay bricks made from zeolite, waste steel slag and expanded perlite, Ceramics International Journal, 44(7) (2018) 7588–7598.
[10] Gunaratne. M, The foundation engineering handbook, Taylor and Francis Group, CRC Press, (2006).
[11] Liu. L, Liu. H, L, Stuedlein. A, Evans. T. M, Xiao. Y, Strength, stiffness, and microstructure characteristics of biocemented calcareous sand, Canadian Geotechnical Journal, 56(10) (2019) 1502-1513.
[12] Obeta. I. N, Ikeagwuani. C, Attama. C. M, Okafor. J, Stability and durability of sawdust ash-lime stabilized black cotton soil, Nigerian Journal of Technology, 38(1) (2019) 75-80.
[13] Esmaeilipour. E, The effect of recession on cement industry and solutions to exit from it, Cement Technology Journal, (2015) (in Persian).
[14] Kordnaeij. A, Ziaie Moayed. R, Soleimani. M, Small strain shear modulus equations for zeolite–cement grouted sands, Geotechnical and Geological Engineering, 37(6) (2019) 5097–5111.
[15] Mola-Abasi. H, Kordtabar. B, Kordnaeij. A, Effect of natural zeolite and cement additive on the strength of sand, Geotechnical and Geological Engineering, 34(5) (2016) 1539–1551.
[16] Tobon. J, Restrepo. O, Paya. J, Comparative analysis of performance of portland cement blended with nano silica and silica fume, Dyna Magazine, 163 (2010) 37-48.
[17] Shooshpasha. I, Abbasi. M, Najafnia. H, Investigation of the combined effect of cement and nanosilica on shear strength of Babolsar sandy soil, Amirkabir Journal of Civil Engineering, 50(1) (2016) 179-188 (in Persian).
[18] Ramzanianpour. A, Firoozmakan. Sh, Ebadi. T, Bahrami. H, The effect of nanosilica on the physical properties and durability of concrete, 6th Civil Engineering Congress, Semnan, (2011) (in Persian).
[19] Fertu. T, Gavrilescu. M, Application of natural zeolites as sorbents in the clean-up of aqueous streams, Environmental Engineering and Management Journal, 11(1) (2012) 867-878.
[20] Ahmadi Chenarboni. H, Lajevardi. H, Mola-Abasi, H. Zeighami, E. The effect of zeolite and cement stabilization on the mechanical behavior of expansive soils, Construction and Building Materials, 272(1) (2020) 1-10.
[21] Kordnaeij. A, Ziaie Moayed. R. Soleimani. M, Unconfined compressive strength of loose sandy soils grouted with zeolite and cement, Soils and Foundations, 59 (2019) 905–919.
[22] Caputo. D, Liguori. B, Colella. C, Some advances in understanding the pozzolanic activity of zeolites: the effect of zeolite structure, Cement and Concrete Composites, 30(5) (2008) 455–462.
[23] Farshbaf Aghajani. H, Soltani-Jigheh. H, Salimi. M, Karimi. S, Estekanchi. V, Akbarzadeh Ahari. R, Investigating the strength, hydraulic conductivity, and durability of the CSG (cemented sand-gravel) check dams: a case study in Iran, SN Applied Sciences, 4(6) (2022) 1-19.
[24] Geng. K, Chai. J, Qin. Y, Li. X, Zhou. H, Collapse inhibition mechanism analysis and durability properties of cement-stabilized Pasha sandstone, Bulletin of Engineering Geology and the Environment, 81(4) (2022) 1-18.
[25] Alipour. R, Heshmati. A. A, Karimiazar. J, Esazadefar. N, Asghari-Kaljahi. E, Bahmani. S. H, Resistance and swelling of Tabriz marl soils stabilised using nano-silica and nano-alumina. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, (2022) 1-14.
[26] Kordnaeij. A, Ziaie Moayed. R, Soleimani. M, Small strain shear modulus equations for zeolite–cement grouted sands, Amirkabir Journal of Civil Engineering, 52(5) (2020) 1–4 (in Persian).
[27] Jafarpour. P, Ziaie Moayed. R, Kordnaeij. A, Behavior of zeolite-cement grouted sand under triaxial compression test, Journal of Rock Mechanics and Geotechnical Engineering, 12 (2020) 149-159.
[28] MolaAbasi. H, Saberian. M, J, Li. Prediction of compressive and tensile strengths of zeolite-cemented sand using porosity and composition, Construction and Building Materials, 202 (2019) 784–795.
[29] MolaAbasi. H, Khajeh. A, Naderi Semsani. S, Effect of the ratio between porosity and SiO2 and Al2O3 on tensile strength of zeolite-cemented sands, Journal of Materials in Civil Engineering, 30(4) (2018) 04018028.
[30] Abbasi. M, Study of the effect of zeolite on the tensile strength of Babolsar sandy soils, Master Thesis, Mazandaran Institute of Higher Industrial Education, (2014) (in Persian).
[31] Abbasi. M, Shooshpasha. I, Mola-Abasi. H, Investigation of the effect of zeolite on tensile strength of sandblasted Babolsar sand cement, Journal of Civil Engineering, Sharif University, 33(1) (2017) 117-120 (in Persian).
[32] Abbasi. M, ShooshPasha. I, MollaAbbasi. H, Investigation of the effect of zeolite on shear strength of Babsalar sand, stabilized by cement, Journal of Civil and Environmental Engineering, Tabriz University, 49(1) (2019) 96-89 (in Persian).
[33] Mola-Abasi. H, Shooshpasha. I, Investigation of the effect of zeolite on Babolsar sandy soil strength, cement-stabilized using uniaxial compressive strength test, Journal of Civil Engineering, Tarbiat Modares University, 16(4) (2016) 203-213 (in Persian).
[34] Mola-Abasi. H, Shooshpasha. I, Influence of zeolite and cement additions on mechanical behavior of sandy soil, Journal of Rock Mechanics and Geotechnical Engineering, 8 (2016) 746-752.
[35] Hong. S, Geotechnical laboratory characterization of sand zeolite mixtures, Master Thesis, USA, (2015).
[36] Shi. J. X, The applications of zeolite in sustainable binders for soil stabilization, Applied Mechanics and Materials, 256 (2013) 112–115.
[37] Demirbas. G, Stabilization of expansive soils using bigadic zeolite, PhD Thesis, University of METU, Ankara,  Turkey, (2009).
[38] James. J, Strength benefit of sawdust/wood ash amendment in cement ctabilization of an expansive soil, Revista Facultad de Ingeniería., 28(50) (2019) 44-61.
[39] Bolarinwa. A, Ola. S. A, A review of the major problem soils in nigeria, Journal of Engineering and Technology, 1(1) (2016) 17-25.
[40] Sun. S, Liu. B, Wang. T, Improvement of expansive soil properties using sawdust, Journal of Solid Waste Technology and Management, 44(1) (2018) 78–85.
[41] Tadayon. R, Dabiri. R, Investigation of the effect of sawdust on the geotechnical behavior of clay soils, Journal of Ferdowsi Civil Engineering, 32(1) (2019) 20-34. (in Persian)
[42] Rakesh. V, Shwetank. R, Chinmayee. R, Lokendra. P, Mayur. R, Stabilisation of black cotton soil using sawdust and cement, International Journal for Scientific Research and Development, 5(9) (2017) 728-731.
[43] Kumar. K. A,  Narayanan. P, Chiranthana. N, Stability of red clay and laterite soil with sawdust as an ammendment, International Journal of Combined Research and Development, 2(2) (2014) 18-23.
[44] Owoyemi. O, Effect of sawdust on the geotechnical properties of a lateritic soil, Journal of Mining and Geology, 57(1) (2021) 127-139.
[45] Abd Elhalim. A, Elbaroudy. A, Influence addition of fine sawdust on the physical properties of expansive soil in the Middle Nile Delta, Egypt, Journal of Soil Science and Plant Nutrition, 14(2) (2014) 483-490.
[46] Annual Book of ASTM D2487 Standards, Standard test method for sieve analysis of fine and coarse aggregates. American Society for Testing and Materials, West Conshohocken, (2012).
[47] Annual Book of ASTM D698 Standards, Standard test methods for laboratory compaction characteristics of soil. American Society for Testing and Materials, West Conshohocken, (2012).
[48] Annual Book of ASTM D4253 Standards, Standard test methods for minimum index density and unit weight of soils and calculation of relative density. American Society for Testing and Materials, West Conshohocken, (2012).
[49] Annual Book of ASTM D4254 Standards, Standard test methods for maximum index density and unit weight of soils and calculation of relative density. American Society for Testing and Materials, West Conshohocken, (2012).
[50] Annual Book of ASTM C136 Standards, Standard test method for sieve analysis of fine and coarse aggregates. American Society for Testing and Materials, West Conshohocken, (2012).
[51] Annual Book of ASTM D854 Standards, Standard test for specific gravity of soil solids by water pycnometer. American Society for Testing and Materials, West Conshohocken, (2012).
[52] Annual Book of ASTM C150 Standards, Standard specifications for cements. American Society for Testing and Materials, West Conshohocken, (2012).
[53] Annual Book of ASTM D2166 Standards, Standard test method for unconfined compressive strength of cohesive soil. American Society for Testing and Materials, West Conshohocken, (2012).