ارزیابی تاثیر آب مغناطیسی بر روی دوام بتن‌های ساخته شده با سرباره ذوب آهن

نوع مقاله : علمی - پژوهشی

نویسندگان

1 استادیار گروه عمران دانشکده فنی و مهندسی دانشگاه آزاد اسلامی واحد تبریز، تبریز،ایران

2 گروه عمران سازه ، دانشکده فنی و مهندسی، دانشگاه آزاد واحد تبریز

چکیده

در این پژوهش برای ارزیابی تاثیر آب مغناطیسی آزمایش‌های مقاومت الکتریکی ، عمق نفوذ آب و آزمایش تعیین مقاومت در برابر ذوب و یخبندان انجام شد؛ که برای عمل آوری آزمونه‌ها برای آزمایش‌های مقاومت الکتریکی ، عمق نفوذ آب از سه نوع شرایط محیطی (محلول‌های سولفاته، کلراته و آب معمولی) و برای عمل آوری آزمونه‌ها برای آزمایش ذوب و یخبندان فقط از حوضچه آب معمولی استفاده شد. طرح اختلاط‌های مورد استفاده در این پژوهش دارای دو نوع مقاومت فشاری بتن 25، 40 مگاپاسکال می‌باشند.
نتایج نشان داد که آب مغناطیسی در بتن تاثیر زیادی داشته و استفاده از آن باعث افزایش مقاومت ویژه الکتریکی بتن می‌گردد و احتمال خوردگی فولاد مدفون در بتن را کاهش می‌دهد. همچنین آب مغناطیسی باعث کاهش عمق نفوذ آب، افزایش تعداد سیکل‌های ذوب و یخبندان و افزایش شاخص دوام می‌گردد. افزایش درصد سرباره ذوب آهن در بتن باعث افزایش مقاومت ویژه الکتریکی بتن، کاهش عمق نفوذ آب، افزایش تعداد سیکل‌های ذوب و یخبندان و شاخص دوام بتن می‌گردد. افزایش مقاومت فشاری بتن از 25 تا 40 مگاپاسکال علاوه بر این که تاثیر زیادی بر روی مشخصات مکانیکی داشته، باعث افزایش مقاومت ویژه الکتریکی بتن، کاهش عمق نفوذ آب و همچنین باعث افزایش تعداد سیکل‌های ذوب و یخبندان و شاخص دوام بتن گردیده است. باید خاطر نشان کرد که آزمونه های قرار گرفته شده در محیط سولفاته نسبت به آزمونه های قرار گرفته شده در محیط کلراته بهتر عمل کرده و کاهش مقاومت الکتریکی و افزایش عمق نفوذ آب کمتری نسبت به آزمونه‌های قرار گرفته در آب معمولی را داشتند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of the effect of magnetic water on the durability of Concrete made of cast iron slag

نویسندگان [English]

  • yousef zandi 1
  • majid abedi 2
1 Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran
2 Department of Structural Civil Engineering, Tabriz Azad University, Iran
چکیده [English]

In this study, to evaluate the effect of magnetic water along with the effect of smelting slag on concrete, electrical resistance tests, water permeation depth and frost and melting resistance tests were carried out. Three types of environmental conditions (sulfate, chlorate and ordinary water solutions) and conventional water ponds were used to perform the tests. The mixing design used in this study has two types of compressive strengths of 25, 40 MPa. The results showed that magnetic water has a great effect on the concrete and its application increases the specific electrical resistance of the concrete and reduces the chance of corrosion of buried steel in the concrete. Magnetic water also reduces the depth of water infiltration, increases the number of thawing and frost cycles, and increases the durability index. Increasing the percentage of smelting slag in concrete increases the specific electrical resistance of concrete, decreasing water penetration depth, increasing the number of frost and melting cycles, and concrete durability index. Increasing the compressive strength of the concrete from 25 to 40 MPa in addition to having a great effect on the mechanical properties, increased the specific electrical resistance of the concrete, decreased the water penetration depth, and also increased the number of frost and thaw cycles and the concrete durability index. It should be noted that the samples exposed to the sulfate medium performed better than the samples exposed to the chlorate medium and had lower electrical resistance and increased water penetration depth than the samples exposed to ordinary water.

کلیدواژه‌ها [English]

  • Magnetic water
  • Iron slag
  • Electrical resistance
  • water penetration depth
  • melting and frost resistance
[1] Elahi, A. and Basheer, P.A.M and Nanukuttan, S.V, Khan, Q.U.Z., “Mecanical and durability properties of high performance concrete containing supplementary cementitious materials”; Construction and building materials; 27(2010)292-299.
[2] Valipour, M and Pargar, F and Shekarchi, M and Khani, s., “Comparing a natural pozzolan, zeolite, to metakaolin and silica fume in terms of their effect on the durability characteristics of concrete: A libratory study”. Construction and building materials; 41(2013) 879-888.
[3] Zandi, Y., Effect of Mixture Composition on Washout Resistance of Highly Flow able Underwater Concrete , 2nd International FIB Congress- Naples- Italia 5-8 June 2006.
[4] Ramezanianpour, A.A., Pilvar, A.R., Mahdikhani, M., Moodi, F., 2011, Practical Evaluation Of Relationship Between Concrete Resistivity, Water Penetration, Rapid Chloride Penetration And Compressive Strength , Construction and Building Materials, vol. 25, pp. 2472–2479.
[5] Mehta, P.K., Monteiro, P.J.M., Concreto: microestrutura, propriedades e materiais. 3rd ed. São Paulo: IBRACON; 2008. 674p.
[6]  Yoon-Seok, Ch., Jung Gu, k., Kwang-Myon., L., 2006, Corrosion behavior of steel bar embedded in fly ash concrete, Corrosion Science, No. 48, pp. , 1733-1745.
[7] Zandi.Y, Concrete tests and interpretation of laboratory result concrete mixing design Tabriz: Forouzou Publication, first Edition,2007 (in Persian)
[8] Zandi.Y, 2009," Advanced concrete technology" , Tabriz: Forouzou Publication, Second Edition(in Persian) 
[9] Won Song, Ha., Woo Pack, Seung., Hyeok Nam, Sang., Chul Jang, Jong. and Saraswathy, Velu., 2010, “ Estimation of the permeability of silica fume cement concrete ”, Construction and building material.
[10] Guneyisi, E., Gesoslu, M.,Strength , permeability and shrinkage cracking of silica fume and metakaolin concretes, Construction and Building Materials . Volume 34, September 2012 .
[11] Vahidi,A ,MirAhmadi,M, Hassanzadeh,M , Zabetiyan,F , Investigation of Effective Factors on Concrete impermeability Studies ,Case Study of the First Iranian Concrete boat, International Conference on Impermeability Concrete of  Drinking Water Tanks,2011(in Persian) 
[12] Powers, T.C., Structure and physical properties of hardened Portland cement paste, Ceramic Soc.Volume 41,Jan.1958
[13] Ericikdi, B., Cihangir, F., Kesimal, A., Deveci,H., Alp, I., Utilization of industrial waste products as pozzolanic material in cemented paste backfill of high sulphide mill tailings, J. Hazard. Mater. 168 (2009) 848–856.
[14] Fais, B., Sabio, N., Strachan, N., The critical role of the industrial sector in reaching long-term emission reduction, energy efficiency and renewable targets, Appl. Energy 162 (2016) 699–712.
[15] Rajamma, R., Ball, R.J., Tarelho, L.A.C., Allen, G.C., Labrincha, J.A., Ferreira, V.M., Characterisation and use of biomass fly ash in cement-based materials, J. Hazard. Mater. 172 (2009) 1049–1060
[16] Embong, R., Kusbiantoro, A., Shafig, N., Nuruddin, M.F., Strength and microstructural properties of fly ash based geopolymer concrete containing high-calcium and waterabsorptive aggregate, J. Clean. Prod. 112 (2016) 816–822.
[17] Siddique, R., Jameel, A., Singh, M., Barnat-Hunek Kunal, D., Ait-Mokhtar, A., Belarbi, R., Rajor, A., Effect of bacteria on strength, permeation characteristics and micro-structure of silica fume concrete, Constr. Build. Mater. 142 (2017) 92–100.
[18] Khan, M.I., Siddique, R., 2011, Utilization of silica fume in concrete: Review of durability properties. Resources, Conservation and Recycling, 57, 30-35.
[19] de Sensale, G.R., 2006, Strength development of concrete with rice-husk ash. Cement and concrete composites, 28(2), 158-160.
[20] Bouikni, A., Swamyb, R.N., Bali, A., Durability properties of concrete containing 50% and 65% slag. Construction and Building Materials (2009) 
[21] J.M.R. Dotto, A.G. de Abreu, D.C.C. Dal Molin, I.L. Muller.,  Influence of silica fume addition on concretes physical properties and on corrosion behaviour of reinforcement bars. Cement & Concrete 26 (2004) 31–39
[22] Wei H, Wang Y, Luo J. Influence of magnetic water on early-age shrinkage cracking of concrete. Constr Build Mater 2017;147(1):91–100. https://doi.org/ 10.1016/j.conbuildmat.2017.04.140.
[23] Nan Su, Yeong-Hwa Wu, Chung-Yo Mar, Effect of magnetic water on the engineering properties of concrete containing granulated blast-furnace slag, Cem. Concr. Res. 30 (2000) 599–605. 1.1016/S0008-8846(00)00215–5.
[24] S. Singh, S. Naval, Effect of magnetic water on the engineering properties of self compacting concrete using binary and ternary blends, Int. J. Sci. Managment. Technol. 9 (1) (2016)
[25] Su, N., Wu, Ch.F., Mar, Ch.Y., Effect of magnetic field treated water on mortar and concrete containing fly ash, Cement and concrete research25,(2003) 681-688
[26] Afshin, H., Gholizadeh, M., Khorshidi, N., Improving mechanical properties of high strength concrete by magnetic water technology, Sci. Iranica 17 (1) (2010) 74–79.
[27] Khorshidi, N., Ansari, M., Bayat, M., An investigation of water magnetization and its influence on some concrete specificities like fluidity and compressive strength, Comput. Concr. 13 (5) (2014) 649–657. 10.12989/cac.2014.13.5.649.
[28] Pradnya Ubale, Rahul D. Pandit, and Abhijeet P. Wadekar, Performance Evaluation of Magnetic Field Treated Water on Convectional Concrete Containing Fly Ash, International Journal of Science Technology and Management, 5(2) (2016) 68-77.
[29] Zou, Chao., song Jiang, Yu., Experimental research on the physical mechanic performances of magnetized concrete, West China Explor. Eng. 7 (2006) 118.
[30] jiu Wang, Li., Zhi Li, Hui., Present research and development of the concrete with magnetized water, Res. Appl. Build. Mater. 1 (2007) 13–18.
[31] Feng Pang, Xiao., Zhu, X.S., The influences of magnetized water on physical properties of concrete, International Conferenc on Applied Superconductivity and Electromagnetic Devices IEEE (2011) 270–274.
[32] Bhatath, S., Subraja, S., Arun Kumar, P., Influence of magnetized water on concrete by replacing cement partially with copper slag, J. Chem. Pharmaceutical Sci. 9 (4) (2016).
[33] Siva Konda Reddy , B., Ghorpade, V.G., Sudarsana Rao, H., Influence of Magnetic Water on Strength Properties of Concrete ndian Journal of Science and Technology, Vol 7(1), 14–18, January 2014
[34] Jain, A., Laad, A., Singh, K.Ch., Murari, K., Effect of Magnetic Water on Properties of Concrete, International Journal of Engineering Science and Computing, May 2017, Volume 7 Issue No.5
[35] Weilin, S., Yun, L., Hanzhao, H., Quingwang, L., Effects of magnetic treatment on properties of cement slurry, Society of Petroleum Engineers of AIME, (Paper) SPE (1992).
[36] Pang, X.F., Deng B., 2009, Investigation of magnetic-field effects on water. international Conference on applied superconductivity and electronic devices 25-27.
[37] Su, N., Wu, Y.H, Mar, Ch.Y., Effect of magnetic water on the engineering properties of concrete containing granulated blast-furnace slag, Cement and Concrete ResearchVolume 30, Issue 4, April 2000, Pages 599-605
[38] Srinivasa Reddy, V., Kranthi Kumar, A., Sumanth, A., Effect of Magnetic Field Treated Water on Fresh and Hardened Properties of Concrete, Journal of Civil Engineering and Environmental Technology p-ISSN: 2349-8404; e-ISSN: 2349-879X; Volume 4, Issue 2; April-June, 2017, pp. 134-138
[39] ASTM C150,Standard Specification for Portland Cement
[40] ASTM C494, Standard Specification for Chemical Admixtures for Concrete
[41] ASTM C989, Standard Specification for Slag Cement for Use in Concrete and Mortars
[43] Fitzgerald, A.E., Charles Kingsley, JR., Umans, S.D., Electric Machinery. 6th Edition
[44] Sung Yao, Wu., Rapid Optimization of Double-Stators Switched Reluctance Motor with Equivalent Magnetic Circuit, Energies 2017, 10(10), 1603; https://doi.org/10.3390/en10101603
[45] ACI C211.1-91,Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete
[47] ACI-222R-01 Protection of Metals in Concrete Against Corrosion Reported by ACI Committee 222
[48] COST 509, Corrosion and Protection of Metals in Contact with Concrete, Final report, R. N. Cox, R. Cigna, O. Vennesland, T. Valente (Eds.), European Commission, Directorate General Science, Research and Development, Brussels, EUR 17608 EN, 1997.
[49] Bs En 12390-8 Testing Hardened Concrete, Part 8 Depth Of Penetration Of Water Under Pressure
[50] DIN 1048-5:1991,Testing Concrete; Testing Of Hardened Concrete (Specimens Prepared In Mould).
[51] ASTM C666,Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing
[52] ASTM C215, Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens.