مصالح و سازه های بتنی

مصالح و سازه های بتنی

تحلیل تجربی اثر الیاف پلی‌پروپیلن و درصد جایگزینی سنگ‌دانه‌های سبک بر مقاومت فشاری و کششی بتن

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دکتری مهندسی عمران، گروه مهندسی عمران، دانشگاه بیرجند، بیرجند، ایران
2 استادیار گروه مهندسی عمران، گروه پژوهشی فناوری‌های نوین در مهندسی عمران، دانشگاه بیرجند، بیرجند
چکیده
در این پژوهش، رفتار مکانیکی بتن اصلاح‌شده با الیاف پلی‌پروپیلن و سنگ‌دانه‌های سبک از طریق مجموعه‌ای از آزمایش‌های تجربی مورد بررسی قرار گرفته است. بدین منظور، نمونه‌های مکعبی و استوانه‌ای با مقادیر مختلفی از الیاف (0، 05/0، 1/0 و 2/0 درصد حجمی) و درصدهای متفاوت جایگزینی سنگ‌دانه‌ی سبک (0، 5/2، 5/7، 12 و 15 درصد) مطابق استانداردهای ASTM ساخته شده و در سه سن عمل‌آوری 7، 28 و 56 روز تحت آزمون‌های مقاومت فشاری و کششی برزیلی قرار گرفتند. نتایج نشان داد که افزودن الیاف پلی‌پروپیلن با درصد بهینه‌ی 05/0درصد موجب بهبود مقاومت فشاری و کششی در بیشتر طرح‌های اختلاط شده و استفاده از 5/7 درصد سنگ‌دانه سبک نیز بیشترین مقاومت را در بیشتر حالت‌ها به همراه داشته است. در حالی‌که افزایش میزان الیاف به 1/0 درصد در بیشتر موردها باعث کاهش مقاومت شده است، تنها در ترکیب با 15 درصد سنگ‌دانه سبک افزایش مقاومت فشاری و کششی مشاهده شد. همچنین افزایش مدت‌زمان عمل‌آوری، اثر مثبت چشم‌گیری بر مقاومت مکانیکی نمونه‌ها داشت. یافته‌های این پژوهش می‌تواند راهنمایی برای طراحی بتن‌های سبک مسلح با عملکرد مکانیکی مطلوب و وزن کمتر در کاربردهای سازه‌ای فراهم آورد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Experimental Evaluation of Polypropylene Fiber Content and Lightweight Aggregate Replacement on Concrete Compressive and Tensile Strengths

نویسندگان English

Atefeh Soleymani 1
Hashem Jahangir 2
1 PhD. in Civil Engineering, Department of Civil Engineering, University of Birjand, Birjand, Iran
2 Assistant Professor, Department of Civil Engineering, Research Group of Novel Technologies in Civil Engineering, University of Birjand, Birjand, Iran
چکیده English

This study investigates the mechanical behavior of concrete modified with polypropylene fibers and lightweight aggregates through a series of experimental tests. To this end, cubic and cylindrical specimens were prepared with varying fiber contents (0, 0.05, 0.1 and 0.2% by volume) and different replacement levels of lightweight aggregates (0, 2.5, 7.5, 12, and 15%). The specimens were tested for compressive and tensile strengths at curing ages of 7, 28, and 56 days. The results indicated that incorporating polypropylene fibers at an optimal dosage of 0.05% improved both compressive and tensile strengths in most mix designs, while a 7.5% replacement of lightweight aggregates yielded the highest strength in the majority of cases. Although increasing the fiber content to 0.1% generally led to a reduction in strength, when combined with 15% lightweight aggregate, both compressive and tensile strengths showed improvement. Furthermore, prolonged curing durations had a significant positive effect on the mechanical performance of the specimens. The findings of this research provide valuable insights for designing lightweight, fiber-reinforced concretes with enhanced mechanical performance and reduced self-weight for structural applications.

کلیدواژه‌ها English

Fiber-Reinforced Concrete
lightweight Aggregate
Polypropylene Fiber
Compressive Strength
Tensile Strength
[1]      J. jun Li, J. gang Niu, C. jun Wan, B. Jin, Y. liu Yin, Investigation on mechanical properties and microstructure of high performance polypropylene fiber reinforced lightweight aggregate concrete, Construction and Building Materials 118 (2016) 27–35. https://doi.org/10.1016/j.conbuildmat.2016.04.116.
[2]      H. Li, Y. Wei, L. Zhao, S. Hu, B. Zhu, P. Ye, Experimental and theoretical studies on fracture performance of bamboo fiber-reinforced lightweight aggregate concrete, Construction and Building Materials 465 (2025) 140250. https://doi.org/10.1016/j.conbuildmat.2025.140250.
[3]      E.G. Badogiannis, I. Christidis, G.E. Tzanetatos, Evaluation of the mechanical behavior of pumice lightweight concrete reinforced with steel and polypropylene fibers, Construction and Building Materials 196 (2019) 443–456. https://doi.org/10.1016/j.conbuildmat.2018.11.109.
[4]      A. Soleymani, D. Rezazadeh Eidgahee, A. Tamimi, H. Jahangir, H. Hasani, M.L. Nehdi, Machine learning assessment of mechanical properties of oil palm shell concrete, Materials Today Communications 49 (2025) 114239. https://doi.org/10.1016/j.mtcomm.2025.114239.
[5]      T.M. Grabois, G.C. Cordeiro, R.D. Toledo Filho, Fresh and hardened-state properties of self-compacting lightweight concrete reinforced with steel fibers, Construction and Building Materials 104 (2016) 284–292. https://doi.org/10.1016/j.conbuildmat.2015.12.060.
[6]      A.A. Zamani, M. Ahmadi, A. Dalvand, F. Aslani, Effect of Single and Hybrid Fibers on Mechanical Properties of High-Strength Self-Compacting Concrete Incorporating 100% Waste Aggregate, Journal of Materials in Civil Engineering 35 (2023). https://doi.org/10.1061/(ASCE)MT.1943-5533.0004528.
[7]      M. Ahmadi, E. Abdollahzadeh, M. Kashfi, B. Khataei, M. Razavi, Life Cycle Assessment and Performance Evaluation of Self-Compacting Concrete Incorporating Waste Marble Powder and Aggregates, Materials 18 (2025) 2982. https://doi.org/10.3390/ma18132982.
[8]      Y. Gao, C. Zou, Experimental study on segregation resistance of nanoSiO2 fly ash lightweight aggregate concrete, Construction and Building Materials 93 (2015) 64–69. https://doi.org/10.1016/j.conbuildmat.2015.05.102.
[9]      A. Bilodeau, V.K.R. Kodur, G.C. Hoff, Optimization of the type and amount of polypropylene fibres for preventing the spalling of lightweight concrete subjected to hydrocarbon fire, Cement and Concrete Composites 26 (2004) 163–174. https://doi.org/10.1016/S0958-9465(03)00085-4.
[10]    J.A. Bogas, A. Gomes, Non-steady-state accelerated chloride penetration resistance of structural lightweight aggregate concrete, Cement and Concrete Composites 60 (2015) 111–122. https://doi.org/10.1016/j.cemconcomp.2015.04.001.
[11]    H.L. Ma, C. Cui, X. Li, S.L. Hu, Study on mechanical properties of steel fiber reinforced autoclaved lightweight shell-aggregate concrete, Materials and Design 52 (2013) 565–571. https://doi.org/10.1016/j.matdes.2013.05.086.
[12]    K.C. Onyelowe, D.-P.N. Kontoni, S. Oyewole, T. Apugo-Nwosu, S. Nasrollahpour, A. Soleymani, S.R.M. Pilla, H. Jahangir, F. Dabbaghi, Compressive strength optimization and life cycle assessment of geopolymer concrete using machine learning techniques, E3S Web of Conferences 436 (2023) 08009. https://doi.org/10.1051/e3sconf/202343608009.
[13]    N.A. Libre, M. Shekarchi, M. Mahoutian, P. Soroushian, Mechanical properties of hybrid fiber reinforced lightweight aggregate concrete made with natural pumice, Construction and Building Materials 25 (2011) 2458–2464. https://doi.org/10.1016/j.conbuildmat.2010.11.058.
[14]    P. Rashiddadash, A.A. Ramezanianpour, M. Mahdikhani, Experimental investigation on flexural toughness of hybrid fiber reinforced concrete (HFRC) containing metakaolin and pumice, Construction and Building Materials 51 (2014) 313–320. https://doi.org/10.1016/j.conbuildmat.2013.10.087.
[15]    M. Hassanpour, P. Shafigh, H. Bin Mahmud, Lightweight aggregate concrete fiber reinforcement - A review, Construction and Building Materials 37 (2012) 452–461. https://doi.org/10.1016/j.conbuildmat.2012.07.071.
[16]    K.C. Onyelowe, D.-P.N. Kontoni, M.E. Onyia, A. Soleymani, A.M. Ebid, H. Jahangir, Overview of meshfree modeling of the flowability of fresh self-compacting concrete for sustainable structures, E3S Web of Conferences 436 (2023) 08008. https://doi.org/10.1051/e3sconf/202343608008.
[17]    H. Tanyildizi, Statistical analysis for mechanical properties of polypropylene fiber reinforced lightweight concrete containing silica fume exposed to high temperature, Materials and Design 30 (2009) 3252–3258. https://doi.org/10.1016/j.matdes.2008.11.032.
[18]    K.C. Onyelowe, A.M. Ebid, H.A. Mahdi, A. Soleymani, H. Jahangir, F. Dabbaghi, Optimization of Green Concrete Containing Fly Ash and Rice Husk Ash Based on Hydro-Mechanical Properties and Life Cycle Assessment Considerations, Civil Engineering Journal 8 (2022) 3912–3938. https://doi.org/10.28991/CEJ-2022-08-12-018.
[19]    A.S. Kamjou, A. Khaloo, S. Hassanpour, Experimental and numerical investigation of minimum required fiber content in bending characteristics of 100 MPa UHPC-formulated concrete, Case Studies in Construction Materials 16 (2022) e01066. https://doi.org/10.1016/j.cscm.2022.e01066.
[20]    S.N. Shinde, S. Christa, R.K. Grover, N. Pasha, D. Harinder, G. Nakkeeran, G.U. Alaneme, Optimization of waste plastic fiber concrete with recycled coarse aggregate using RSM and ANN, Scientific Reports 15 (2025) 7798. https://doi.org/10.1038/s41598-025-92505-8.
[21]    A. Seydmoradi, M.H. Tavana, M.R. Habibi, Investigation on the response of steel fiber reinforced lightweight aggregate concrete slab under sequential impact loading, Engineering Failure Analysis 161 (2024) 108221. https://doi.org/10.1016/j.engfailanal.2024.108221.
[22]    P. Bancerz, J. Katzer, P. Miarka, Case study of fiber reinforced, lightweight concrete, intended for production of precast elements, Case Studies in Construction Materials 21 (2024) e03755. https://doi.org/10.1016/j.cscm.2024.e03755.
[23]    A. Abbadi, A. El Refai, H.A. El Mal, Shear behavior of fiber-reinforced lightweight concrete beams reinforced with BFRP bars, Construction and Building Materials 484 (2025) 141762. https://doi.org/10.1016/j.conbuildmat.2025.141762.
[24]    Q. Liao, X.-D. Zhao, W.-W. Wu, J.-X. Lu, K.-Q. Yu, C.S. Poon, A review on the mechanical performance and durability of fiber reinforced lightweight concrete, Journal of Building Engineering 88 (2024) 109121. https://doi.org/10.1016/j.jobe.2024.109121.
[25]    K. Zhang, W. Lin, Q. Lan, Q. Zhang, Compressive properties of polypropylene fiber reinforced seawater sea-sand recycled aggregate concrete under different strain rate loading, Construction and Building Materials 452 (2024) 138968. https://doi.org/10.1016/j.conbuildmat.2024.138968.
[26]    G. Huang, L. Su, C. Xue, Y. Zhang, H. Qiao, C. Wang, Study on the deterioration mechanism of hybrid basalt-polypropylene fiber-reinforced concrete under sulfate freeze-thaw cycles, Construction and Building Materials 449 (2024) 138560. https://doi.org/10.1016/j.conbuildmat.2024.138560.
[27]    A.A. Alawi Al-Naghi, K. Aamir, M.N. Amin, B. Iftikhar, K. Mehmood, M.T. Qadir, Predicting strength in polypropylene fiber reinforced rubberized concrete using symbolic regression AI techniques, Case Studies in Construction Materials 23 (2025) e05024. https://doi.org/10.1016/j.cscm.2025.e05024.
[28]    L. Yan, L. Liu, C. Liu, Bonding performances of polypropylene fiber reinforced concrete beam-type specimen at corrosion conditions: Experimental and simulation study, Journal of Building Engineering 105 (2025) 112479. https://doi.org/10.1016/j.jobe.2025.112479.
[29]    N. Liang, S. Geng, J. Mao, X. Liu, X. Zhou, Investigation on cracking resistance mechanism of basalt-polypropylene fiber reinforced concrete based on SEM test, Construction and Building Materials 411 (2024) 134102. https://doi.org/10.1016/j.conbuildmat.2023.134102.
[30]    H. Wang, X. He, M. Zhou, B. Wei, W. Wu, G. Zhou, J. He, A study on the tensile fracture behavior of polypropylene fiber reinforced concrete based on a microscale model, Construction and Building Materials 417 (2024) 135291. https://doi.org/10.1016/j.conbuildmat.2024.135291.
[31]    A. Khaloo, A. Daneshyar, B. Rezaei, A. Fartash, Fiber bridging in polypropylene‐reinforced high‐strength concrete: An experimental and numerical survey, Structural Concrete 23 (2022) 457–472. https://doi.org/10.1002/suco.202000779.
[32]    H. Toutanji, S. McNeil, Z. Bayasi, Chloride permeability and impact resistance of polypropylene-fiber-reinforced silica fume concrete, Cement and Concrete Research 28 (1998) 961–968. https://doi.org/10.1016/S0008-8846(98)00073-8.
[33]    C. Wu, X. He, X. Zhao, L. He, Y. Song, X. Zhang, Effect of Fiber Content on Mechanical Properties and Microstructural Characteristics of Alkali Resistant Glass Fiber Reinforced Concrete, Advances in Materials Science and Engineering 2022 (2022) 1–19. https://doi.org/10.1155/2022/1531570.
[34]    W. Yang, Z. Tang, W. Wu, K. Zhang, J. Yuan, H. Li, Z. Feng, Effect of different fibers on impermeability of steam cured recycled concrete, Construction and Building Materials 328 (2022) 127063. https://doi.org/10.1016/j.conbuildmat.2022.127063.
[35]    D. Wang, Y. Ju, H. Shen, L. Xu, Mechanical properties of high performance concrete reinforced with basalt fiber and polypropylene fiber, Construction and Building Materials 197 (2019) 464–473. https://doi.org/10.1016/j.conbuildmat.2018.11.181.
[36]    L. Chen, X. Zhang, G. Liu, Analysis of dynamic mechanical properties of sprayed fiber-reinforced concrete based on the energy conversion principle, Construction and Building Materials 254 (2020) 119167. https://doi.org/10.1016/j.conbuildmat.2020.119167.
[37]    P. Fakharian, R. Bazrgary, A. Ghorbani, D. Tavakoli, Y. Nouri, Compressive Strength Prediction of Green Concrete with Recycled Glass-Fiber-Reinforced Polymers Using a Machine Learning Approach, Polymers 17 (2025) 2731. https://doi.org/10.3390/polym17202731.
[38]    S. Hamoush, T. Abu-Lebdeh, T. Cummins, Deflection behavior of concrete beams reinforced with PVA micro-fibers, Construction and Building Materials 24 (2010) 2285–2293. https://doi.org/10.1016/j.conbuildmat.2010.04.027.
[39]    S.P. Yap, C.H. Bu, U.J. Alengaram, K.H. Mo, M.Z. Jumaat, Flexural toughness characteristics of steel-polypropylene hybrid fibre-reinforced oil palm shell concrete, Materials and Design 57 (2014) 652–659. https://doi.org/10.1016/j.matdes.2014.01.004.
[40]    L. Chen, Y. Nouri, N. Allahyarsharahi, H. Naderpour, D. Rezazadeh Eidgahee, P. Fakharian, Optimizing compressive strength prediction in eco-friendly recycled concrete via artificial intelligence models, Multiscale and Multidisciplinary Modeling, Experiments and Design 8 (2025) 24. https://doi.org/10.1007/s41939-024-00641-x.
[41]    ASTMD2419/D2419, Standard Test Method for Sand Equivalent Value of Soils and Fine Aggregate, (2002).
[42]    ASTMC136/C136, Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, (2001).
[43]    ASTMC128/C128, Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, (2001).
[44]    astmc127/c127, Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate, (2001).
[45]    A. C33/C33M, Standard specification for concrete aggregates, (2013).
[46]    ASTMC29/C29, Standard Test Method for Bulk Density and Voids in Aggregate., (2003).
[47]    ASTMC39/C39M, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, (2020).
[48]   ASTMC496/C496M-17, Standard test method for splitting tensile strength of cylindrical concrete specimens, (2017).
[49]    BS-1881:117, Testing concrete Part 117. Method for determination of tensile splitting strength., (1983).

  • تاریخ دریافت 01 آبان 1404
  • تاریخ بازنگری 09 آذر 1404
  • تاریخ پذیرش 10 آذر 1404