مصالح و سازه های بتنی

مصالح و سازه های بتنی

تاثیر استفاده از الیاف پلیمری سینتتیک و پلی وینیل الکل بر مشخصات مکانیکی کامپوزیتهای سیمانی مهندسی شده پرمقاومت حاوی مواد پوزولانی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی دکتری گروه عمران، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران
2 دانشیار بخش فناوری بتن، مرکز تحقیقات راه، مسکن و شهرسازی، تهران، ایران
3 دانشیارگروه مهندسی عمران، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران
4 استادیارگروه مهندسی عمران، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران
5 استادیارگروه مهندسی نساجی، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران
چکیده
چکیده: این مقاله نتایج یک مطالعه آزمایشگاهی در راستای توسعه نسل جدیدی از کامپوزیت‌های سیمانی مهندسی شده را گزارش می‌کند. بر این اساس، تاثیر استفاده از الیاف پلیمری سینتتیک و الیاف پلی وینیل الکل بصورت مجزا و ترکیبی بر مشخصات مکانیکی کامپوزیت سیمانی مهندسی شده پر مقاومت شامل مقاومت فشاری و رفتار خمشی مورد بررسی قرار گرفت. الیاف سینتتیک و پلی وینیل الکل با مقادیر متفاوت و همچنین زئولیت طبیعی با مقادیر 65، 70، 80 و 90 کیلوگرم در هر مترمکعب و دوده سیلیس به میزان 90، 100 و 110 کیلوگرم در هر متر مکعب به عنوان مصالح پوزولانی در کامپوزیت سیمانی مهندسی شده مورد استفاده قرار گرفتند. نتایج نشان داد استفاده از الیاف بصورت مجزا و ترکیبی، عملکرد فشاری و رفتار خمشی مخلوط‌های مورد مطالعه را به ترتیب در محدوده حدود 5 تا 35 درصد و 65 تا 200 درصد بهبود بخشیده است. بر اساس نتایج، بیشترین مقاومت فشاری در سن 28 روزه، 100 مگاپاسکال و بیشترین مقاومت خمشی در حدود 16 مگاپاسکال بدست آمد. مطالعات مربوط به منحنی‌های عملکرد خمشی این مطالعه، نشان دهندة رفتار سه بخشی شامل شاخة صعودی تا حد مقاومت خمشی حداکثر، بخش نزولی بصورت افت مشخصات مقاومت خمشی ولی با توسعة رفتار کرنشی و انعطاف پذیری و در آخرین مرحله، رفتار شاخه صعودی بصورت سخت‌شوندگی کرنش می‌باشد. بدین ترتیب، این منحنی‌ها نشان از عملکرد مثبت الیاف در بهبود مشخصات خمشی مخلوط‌های مورد بررسی دارد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Effects of using Synthetic Polymer Fibers and Polyvinyl Alcohol on the Mechanical Characteristics of High Strength engineered Cement Composite Containing Supplementary Cementitious Materials

نویسندگان English

mehdi kohiazartulun 1
Jafar Sobhani 2
S. Mohammad Mirhosseini 3
Ehsanollah Zeighami 4
Mohammad Reza Basiri 5
1 PhD Student, Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran
2 Associate Professor, Department of Concrete Technology, Road, Housing and Urban Development Research Center, Tehran, Iran
3 Associate Professor, Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran
4 Assistant Professor, Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran
5 Assistant Professor, Department of Textile Engineering, Arak Branch, Islamic Azad University, Arak, Iran
چکیده English

This paper reports the results of a laboratory study aimed at developing a new generation of engineered cement composites. Accordingly, the effects of solo and combined application of synthetic polymer and polyvinyl alcohol fibers on the mechanical properties of high-strength engineered cement composites, including compressive strength and flexural behavior, was investigated. Synthetic fibers and polyvinyl alcohol with different amounts, as well as natural zeolite with amounts of 65 kg/m3, 70 kg/m3, 80 kg/m3, and 90 kg/m3 and silica fume with amounts of 90 kg/m3, 100 kg/m3, and 110 kg/m3, were used as pozzolanic materials in the engineered cement composites. The results showed that using fibers separately and in combination improved the compressive strength and flexural behavior of the studied mixtures in the range of 5 % to 35 % and 65 to 200 %, respectively. Based on the results, the highest compressive strength at the age of 28 days was estimated at about 110 MPa and the highest flexural strength was 16 MPa. Studies on the flexural performance curves of this study show a three-part behavior including an ascending branch up to the maximum flexural strength, a descending branch as a decrease in flexural strength characteristics but with the development of strain behavior and flexibility, and in the last stage, the ascending branch behavior as strain hardening. Thus, these curves indicate the positive performance of fibers in improving the flexural characteristics of the mixtures under study.

کلیدواژه‌ها English

engineered cement composites (ECC)
CompressiveStrength
Flexural Behavior
Fibers
Natural Zeolite
[1] Shoji, D., He, Z., Zhang, D. and et al., (2022). The greening of engineered cementitious composites (ECC): A review. Construction and Building Materials, 327: p.126701.
[2] Zhu, H.; Yu, K.; Li, V.C. (2021). Sprayable Engineered Cementitious Composites (ECC) Using Calcined Clay Limestone Cement (LC3) and PP Fiber. Cem. Concr. Compos. 115: 103868.
[3] M. Imani, M. Donn, Z. Balador, (2019). Bio-inspired materials: contribution of biology to energy efficiency of buildings, in: L.M.T. Martínez, O.V. Kharissova, B.I. Kharisov (Eds.), Handbook of Ecomaterials, Springer International Publishing, Cham, pp. 22132236.
[4] H. Bahmani, D. Mostofinejad, (2022). Microstructure of ultra-high-performance concrete (UHPC) a review study, J. Build. Eng. 50: 104118.
[5] D. Ravichandran, P.R. Prem, S.K. Kaliyavaradhan, P.S. Ambily, (2022). Influence of fibers on fresh and hardened properties of Ultra High Performance Concrete (UHPC)a review, J. Build. Eng. 57: 104922.
[6] K.T. Soe, Y.X. Zhang, L.C. Zhang, (2013). Impact resistance of hybrid-fiber engineered cementitious composite panels, Compos. Struct. 104: 320330.
[7] V.C. Li, C.K.Y. Leung, (1992). Steady state and multiple cracking of short random fiber composites, ASCE J. Eng. Mech. 188: 2246–2264.
[8] Sahmaran M, Li VC. (2009). Durability properties of micro-cracked ECC containing high volumes fly ash. Cem Concr Res 39:1033–43.
[9] M.D. Lepech, V.C. Li, R.E. Robertson, G.A. Keoleian, (2008). Design of green engineered cementitious composites for improved sustainability, Aci Mater. J. 105: 567.
[10] Y. Ruan, B. Han, X. Yu, Z. Li, J. Wang, S. Dong, J. Ou, (2018). Mechanical behaviors of nano-zirconia reinforced reactive powder concrete under compression and flexure, Constr. Build. Mater. 162: 663–673.
[11] B.S. Mohammed, V.C. Khed, M.S. Liew, (2018). Optimization of hybrid fibres in engineered cementitious composites, Constr. Build. Mater. 190: 24–37.
[12] H.R. Pakravan, M. Jamshidi, M. Latifi, (2016). Study on fiber hybridization effect of engineered cementitious composites with low- and high-modulus polymeric fibers, Constr. Build. Mater. 112: 739–746.
[13] S.F.U. Ahmed, M. Maalej, (2009). Tensile strain hardening behaviour of hybrid steel-polyethylene fiber reinforced cementitious composites, Constr. Build. Mater. 23: 96–106.
[14] Shiyao Zhu, Y.X. Zhang, C.K. Lee, (2024). an experimental study on hybrid fibre reinforced engineered cementitious composite link slabs under static and fatigue loadings, Engineering Structures 300: 117254.
[15] Feng Shi, Thong M. Pham, Hong Hao, Yifei Hao, (2020). Post-cracking behavior of basalt and macro polypropylene hybrid fiber reinforced concrete with different compressive strengths, Construction and Building Materials 262: 120108.
[16] P.K. Mehta, (2002). “Greening of the Concrete Industry for Sustainable Development”, Concrete International.
[17] Malhotra VM. (2000). Role of Supplementary Cementing Materials in Reducing Greenhouse Gas Emissions. In: Gjorv OE, Sakai K, editors. Concrete Technology for a Sustainable Development in the 21st Century. London: E&FN Spon.
[18] Torres A, Brandt J, Lear K, Liu J. (2017). A looming tragedy of the sand commons. Science 357(6355):970–1.
[19] L.F. Zhang, W.Q. Liu, L. Wang, Z.B. Ling, (2020). On-axis and off-axis compressive behavior of pultruded GFRP composites at elevated temperatures, Compos. Struct. 236: 111891.
[20] J.K. Kim, J.S. Kim, G.J. Ha, Y.Y. Kim, (2007). Tensile and fiber dispersion performance of ECC (engineered cementitious composites) produced with ground granulated blast furnace slag, Cem. Concr. Res. 37: 1096–1105.
[21] J. Zhang, Q. Wang, Z.B. Wang, (2016). Optimizing design of high strength cement matrix with supplementary cementitious materials, Constr. Build. Mater. 120: 123–136.
[22] Qing Wang, M.H. Lai, J. Zhang, Zhenbo Wang, J.C.M. Ho, (2020). Greener engineered cementitious composite (ECC) – The use of pozzolanic fillers and unoiled PVA fibers, Construction and Building Materials 247: 118211.
[23] ASTM C1017 / C1017M-13e1, (2013). Standard Specification for Chemical Admixtures for Use in Producing Flowing Concrete, ASTM International, West Conshohocken, PA.
[24] ASTM C494 / C494M-19, (2019). Standard Specification for Chemical Admixtures for Concrete, ASTM International, West Conshohocken, PA.
[25] ASTM C1116 / C1116M-10a, (2015). Standard Specification for Fiber-Reinforced Concrete, ASTM International, West Conshohocken, PA.
[26] BS EN 12390-3, (2019). Standard Test Method for Compressive Strength of Cement Mortar.
[27] CECS 44-8. (2009). Standard Test Methods for Fiber Reinforced Concrete; China Engineering and Construction Society Press: Beijing, China.
[28] He Zhu, Duo Zhang, Tianyu Wang, Haoliang Wu, Victor C. Li, (2020). Mechanical and self-healing behavior of low carbon engineered cementitious composites reinforced with PP-fibers, Construction and Building Materials 259: 119805.
[29] Ahsan Waqar, Muhammad Basit Khan, et al, (2024). Investigating the synergistic effects of carbon fiber and silica fume on concrete strength and eco-efficiency, Case Studies in Construction Materials 20: e02967.
[30] Kun-Mo Lee, Pil Ju Park, (2005). Estimation of the environmental credit for the recycling of granulated blast furnace slag based on LCA, Resources, Conservation and Recycling 44: 139–151.
[31] Valipour M, Yekkalar M, Shekarchi M, Panahi S, (2013). Environmental assessment of green concrete containing natural zeolite on the global warming index in marine environments, Journal of Cleaner Production, 1-6.
[32] Xiao-Yong Wang, (2020). Optimal mix design of low-CO2 blended concrete with limestone powder, Construction and Building Materials 263: 121006.
 

  • تاریخ دریافت 17 مهر 1403
  • تاریخ بازنگری 10 دی 1403
  • تاریخ پذیرش 10 دی 1403