بررسی آزمایشگاهی و تحلیلی تاثیر الیاف فولادی در خصوصیات مکانیکی و کارایی بتن های خود تراکم الیافی

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، گروه مهندسی عمران، دانشگاه پیام نور، صندوق پستی 3697-19395، تهران، ایران

چکیده

بتن های خود تراکم با توجه به مزایای آن ها روز به روز در حال توسعه می باشند. در این بین بتن های توانمند نیز به دلیل ویژگی های مناسب مورد توجه محقین قرار گرفته اند. در این مقاله با استفاده از یک تحقیق آزمایشگاهی، مطالعه جامعی بر روی خصوصیات مکانیکی و کارایی بتن توانمند الیافی خود تراکم صورت گرفته است. در قالب این مقاله 9 طرح اختلاط ساخته شد. آزمایش های مقاومت فشاری، کششی، خمشی در بخش خصوصیات مکانیکی بر روی نمونه ها انجام شد. در بخش کارایی، آزمایش حلقه J انجام شد و همچنین آزمایش تعیین سرعت امواج آلتراسونیک به منظور بررسی کیفیت ساخت نمونه ها انجام شد. مطابق با نتایج به دست آمده تاثیر الیاف بر مقاومت کششی و خمشی به مراتب بیشتر از مقاومت فشاری بود. از طرفی افزودن الیاف تاثیرات منفی بر روی کارایی و سرعت امواج داشت. در نهایت نیز روابطی به منظور محاسبه مقاومت کششی و خمشی نمونه ها بر حسب مقاومت فشاری ارائه شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental and Analytical Investigation on The Effect of Steel Fibers on The Mechanical Properties and Performance of Fibrous Self-Compacting Concretes

نویسنده [English]

  • Ali Ghorbani
Assistant Professor, Department of Engineering, Payame Noor University, Tehran, Iran
چکیده [English]

Using self-compacting concrete is increasing due to its advantages. Also, the high-performance concrete has attracted a lot of researcher attention because of its special characteristics. In this research, a comprehensive experimental investigation is performed on the mechanical and flowability of high-performance self-compacting concrete. In this article, nine mix compositions were cast and tested. In mechanical properties part, the compressive strength, splitting tensile strength and flexural strength were tested. In the durability and flowability part, J-Ring and ultra-sonic pulse velocity (UPV) tests were conducted on the specimens. According to the results, the effects of fiber on tensile and flexural strength were significantly more than the compressive strength. On the other hand, the addition of fibers had negative effects on the workability and UPV results. Finally, to calculate the tensile and flexural strength of specimens versus compressive strength, the relationships were proposed.

کلیدواژه‌ها [English]

  • Compressive strength
  • Tensile Strength
  • Self-Compacting Concrete
  • Flowability
[1]         Fakharifar M, Dalvand A, Arezoumandi M, Sharbatdar MK, Chen G, Kheyroddin A. Mechanical properties of high performance fiber reinforced cementitious composites. Comput Chem Eng 2014;71:510–20. https://doi.org/10.1016/j.conbuildmat.2014.08.068.
[2]         Mechanical performance of self-compacting concrete reinforced with steel fibers A Khaloo, EM Raisi, P Hosseini, H Tahsiri Construction and building materials 51, 179-186.
[3]         Sun Z, Lin X, Vollpracht A. Pervious concrete made of alkali activated slag and geopolymers. Constr Build Mater 2018;189:797–803. https://doi.org/10.1016/j.conbuildmat.2018.09.067.
[4]         Alzeebaree R, Çevik A, Nematollahi B, Sanjayan J, Mohammedameen A, Gülşan ME. Mechanical properties and durability of unconfined and confined geopolymer concrete with fiber reinforced polymers exposed to sulfuric acid. Constr Build Mater 2019;215:1015–32. https://doi.org/10.1016/j.conbuildmat.2019.04.165.
[5]         Lee WH, Wang JH, Ding YC, Cheng TW. A study on the characteristics and microstructures of GGBS/FA based geopolymer paste and concrete. Constr Build Mater 2019;211:807–13. https://doi.org/10.1016/j.conbuildmat.2019.03.291.
[6]         Mastali M, Dalvand A. Use of silica fume and recycled steel fibers in self-compacting concrete (SCC). Constr Build Mater 2016;125:196–209. https://doi.org/10.1016/j.conbuildmat.2016.08.046.
[7]         Mastali M, Dalvand A. The impact resistance and mechanical properties of self-compacting concrete reinforced with recycled CFRP pieces. Compos Part B Eng 2016;92:360–76. https://doi.org/10.1016/j.compositesb.2016.01.046.
[8]         Mastali M, Abdollahnejad Z, Dalvand A, Sattarifard A, Illikainen M. Comparative effects of using recycled CFRP and GFRP fibers on fresh- and hardened-state properties of self-compacting concretes: a review. New Mater. Civ. Eng., Elsevier; 2020, p. 643–55. https://doi.org/10.1016/B978-0-12-818961-0.00019-3.
[9]         Altalabani D, Bzeni DKH, Linsel S. Mechanical properties and load deflection relationship of polypropylene fiber reinforced self-compacting lightweight concrete. Constr Build Mater 2020;252:119084. https://doi.org/10.1016/j.conbuildmat.2020.119084.
[10]       Faraj RH, Hama Ali HF, Sherwani AFH, Hassan BR, Karim H. Use of recycled plastic in self-compacting concrete: A comprehensive review on fresh and mechanical properties. J Build Eng 2020;30:101283. https://doi.org/10.1016/j.jobe.2020.101283.
[11]       Harihanandh M, Rajeshkumar V, Elango KS. Study on mechanical properties of fiber reinforced self compacting concrete. Mater Today Proc 2021;45:3124–31. https://doi.org/10.1016/j.matpr.2020.12.214.
[12]       Md Zain MR, Oh CL, Lee SW. Investigations on rheological and mechanical properties of self-compacting concrete (SCC) containing 0.6 μm eggshell as partial replacement of cement. Constr Build Mater 2021;303:124539. https://doi.org/10.1016/j.conbuildmat.2021.124539.
[13]       Revilla-Cuesta V, Faleschini F, Zanini MA, Skaf M, Ortega-López V. Porosity-based models for estimating the mechanical properties of self-compacting concrete with coarse and fine recycled concrete aggregate. J Build Eng 2021;44:103425. https://doi.org/10.1016/j.jobe.2021.103425.
[14]       Mastali M, Dalvand A, Sattarifard A. The impact resistance and mechanical properties of the reinforced self-compacting concrete incorporating recycled CFRP fiber with different lengths and dosages. Compos Part B Eng 2017;112:74–92. https://doi.org/10.1016/j.compositesb.2016.12.029.
[15]       Mastali M, Dalvand A. Use of silica fume and recycled steel fibers in self-compacting concrete (SCC). Constr Build Mater 2016;125:196–209. https://doi.org/10.1016/j.conbuildmat.2016.08.046.
[16]       Mastali M, Dalvand A. The impact resistance and mechanical properties of fiber reinforced self-compacting concrete (SCC) containing nano-SiO 2 and silica fume. Eur J Environ Civ Eng 2018;22:1–27. https://doi.org/10.1080/19648189.2016.1177604.
[17]       Anuradha V, Ch.Madhavi T. Behaviour of self compacting concrete hybrid fiber reinforced hollow beams. Structures 2022;35:990–1001. https://doi.org/10.1016/j.istruc.2021.11.058.
[18]       Ullah Khan S, Ayub T. Flexure and shear behaviour of self-compacting reinforced concrete beams with polyethylene terephthalate fibres and strips. Structures 2020;25:200–11. https://doi.org/10.1016/j.istruc.2020.02.023.
[19]       Perumal K, Kumar A, Lingeshwaran N, Susmitha S. Experimental studies on flexural behaviour of self compact concrete beam. Mater Today Proc 2020;33:129–35. https://doi.org/10.1016/j.matpr.2020.03.319.
[20]       Shatarat N, Mahmoud HM, Katkhuda H. Shear capacity investigation of self compacting concrete beams with rectangular spiral reinforcement. Constr Build Mater 2018;189:640–8. https://doi.org/10.1016/j.conbuildmat.2018.09.046.
[21]       Al-Shaar AAM, Göğüş MT. Flexural behavior of lightweight concrete and self-compacting concrete-filled steel tube beams. J Constr Steel Res 2018;149:153–64. https://doi.org/10.1016/j.jcsr.2018.07.027.
[22]       Hossain KMA, Hossain MA, Manzur T. Structural performance of fiber reinforced lightweight self-compacting concrete beams subjected to accelerated corrosion. J Build Eng 2020;30:101291. https://doi.org/10.1016/j.jobe.2020.101291.
[23]       Mahalingasharma SJ, Parasivamurthy P, Das VR, Arun BR. The combined effect of GGBS and low volumefibres on the low-velocity impact and mechanical properties of self-compacting concrete. Mater Today Proc 2021. https://doi.org/10.1016/j.matpr.2021.09.339.
[24]       Basser H, Shaghaghi TM, Afshin H, Ahari RS, Mirrezaei SS. An experimental investigation and response surface methodology-based modeling for predicting and optimizing the rheological and mechanical properties of self-compacting concrete containing steel fiber and PET. Constr Build Mater 2021:125370. https://doi.org/10.1016/j.conbuildmat.2021.125370.
[25]       Elango KS, Vivek D, Anandaraj S, Saravanakumar R, Sanfeer J, Saravanaganesh S. Experimental study on self compacting concrete using light weight aggregate. Mater Today Proc 2021. https://doi.org/10.1016/j.matpr.2021.10.240.
[26]       ASTM International. Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens 1 This standard is for EDUCATIONAL USE ONLY . Annu B ASTM Stand 2010;i:1–7. https://doi.org/10.1520/C0039.
[27]       ASTM C 496. Standard Test Method for splitting tensile strength of cylindrical concrete specimen. Annu B ASTM Stand Vol 0402 2004:1–5.
[28]       Test CC, Drilled T, Concrete C. Standard Test Method for Flexural Strength of Concrete ( Using Simple Beam with Third-Point Loading ) 1. Hand 2010;C78-02:1–4. https://doi.org/10.1520/C0078.