Experimental evaluation on engineering properties and microstructure of the high-performance fiber-reinforced mortar with low polypropylene fiber content
Email:
htphuoc@ctu.edu.vn
Từ khóa:
high-performance fiber-reinforced mortar, engineered cementitious composite, drying shrinkage, mechanical strength, microstructure.
Tóm tắt
Recently, high-performance fiber-reinforced mortar/concrete (HPFRM) has been researched and developed in many fields such as repair, maintenance, and new construction of infrastructure works due to its high strain capacity and tight crack width characteristics. Optimizing the design of mixture proportions and structures using HPFRM is still a complex mechanical and physical process, depending on the design principles, specific site conditions, and their local materials. This study aims to develop an HPFRM with low polypropylene fiber content by using locally available ingredients in Southern Vietnam to address the deficiencies commonly observed in traditional cement grout mortars. Three mixture proportions were prepared with different water-to-binder (w/b) ratios of 0.2, 0.25, and 0.3. Then, the performance of HPFRM was evaluated in both fresh and hardened stages. Additionally, the microstructural characteristics of each mix design were also assessed through scanning electron microscope observation. The experimental results showed that the optimum w/b of 0.25 and a fixed dosage of 0.6% polypropylene fiber produced positive impacts on the rheological, mechanical properties, and also ductility of the high-performance mortar. It was concluded that HPFRMs are promising for cost-effective and sustainable cement mortars.Tài liệu tham khảo
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[2]. D. L. Nguyen, D. N. Tong, Bending resistance of steel-bar reinforced concrete beam with extreme compression zones using high-performance composite, Lecture Notes in Civil Engineering, 8 (2018) 89-99. https://doi.org/10.1007/978-981-10-6713-6_8
[3]. Nguyen Thanh Binh, Tran Ba Viet, Dispersed steel fiber reinforced decorative concrete to repair the pavement of monuments, The Builder, 177 (2006) 47- 49. (in Vietnamese)
[4]. Ho Trong Manh, High-grade concrete application to repair aircraft hangar floors, Report of the 10th Scientific Conference for young researcher to celebrate the 45th anniversary of the establishment of the Vietnam Institute foor Building Science and Technology Hanoi, (2008) 397-403 (in Vietnamese)
[5]. Transportation Newspaper, Close-up of the first UHPC production for Thang Long bridge deck repair project. https://www.baogiaothong.vn/can-canh-do-me-betong-sieu-tinh-nang-dau-tien-du-an-sua-mat-cau-thang-long-d480732.html (in Vietnamese) (accessed 01 August 2021)
[6]. G. Yildirim, M. Sahmaran, O. Anil, 15 - Engineered cementitious composites-based concrete, in Eco-efficient repair and rehabilitation of concrete infrastructures, Woodhead Publishing, (2018) 387-427. https://doi.org/10.1016/B978-0-08-102181-1.00015-0
[7]. V. C. Li, Introduction to engineered cementitious composites (ECC), in Engineered Cementitious Composites (ECC), Springer, Berlin, Heidelberg, (2019). https://doi.org/10.1007/978-3-662-58438-5_1
[8]. V. C. Li, Micromechanics and engineered cementitious composites (ECC): Design Basis, in Engineered Cementitious Composites (ECC), Springer, Berlin, Heidelberg, (2019). https://doi.org/10.1007/978-3-662-58438-5_2
[9]. M. Anderson et al., Advantageous construction techniques for ECC overlays, Tran-SET, (2020) 247-257. https://doi.org/10.1061/9780784483305.025
[10]. R. Srinivasan, R. Venkatasubramani, S. Venkataraman, Comparative study on durability properties of engineered cementitious composites with polypropylene fiber and glass fiber, Archives of Civil Engineering, LXIII (2017) 83-110. https://doi.org/10.1515/ace-2017-0042
[11]. S. W. Lee, C. L. Oh, M. R. M. Zain, Evaluation of the design mix proportion on mechanical properties of engineered cementitious composites, Key Engineering Materials VIII, 775 (2018) 589-595. https://doi.org/10.4028/www.scientific.net/KEM.775.589
[12]. A. Adesina, S. Das, Evaluation of the durability properties of engineered cementitious composites incorporating recycled concrete as aggregate, Journal of Materials in Civil Engineering, 33 (2021) 04020439. https://doi.org/10.1061/(ASCE)MT.1943-5533.0003563
[13]. Z. Zhang, S. Qian, Influence of rubber powder on the mechanical behavior of engineered cementitious composites, Sustainable Construction Materials, (2012) 215-224. https://doi.org/10.1061/9780784412671.0019
[14]. T. R. Board, National academies of sciences engineering and medicine, thin and ultra-thin whitetopping. Washington, DC: The National Academies Press, 2004. https://doi.org/10.17226/23333
[15]. E. Y. Hajj, D. H. Sanders, N. D. Weitzel, Development of specifications for engineered cementitious composites for use in bridge deck overlays, University of Nevada, NV United States 89557 Nevada Department of Transportation Carson City, NV United States 89712, 2016. https://www.nevadadot.com/home/showdocument?id=9109
[16]. Nguyen Tan Khoa, Nguyen Thanh Sang, Mechanical properties and durability of blast furnace slag sand concrete and applicability in marine constructions, Transport and Communications Science Journal, 71 (2020) 568-582. https://doi.org/10.25073/tcsj.71.5.9 (in Vietnamese)
[17]. K. Yu, Y. Ding, Y. X. Zhang, Size effects on tensile properties and compressive strength of engineered cementitious composites, Cement and Concrete Composites, 113 (2020) 103691. https://doi.org/10.1016/j.cemconcomp.2020.103691
[18]. G. A. A. Amador, T. Rupnow, M. Hassan, Evaluation of the performance and cost-effectiveness of engineered cementitious composites (ECC) produced from region 6 local materials, Tran-SET Project No. 17CLSU05, 2018. https://digitalcommons.lsu.edu/transet_pubs/7
[19]. M. I. Khan et al., Optimized fresh and hardened properties of strain-hardening cementitious composites: Effect of sand size and workability, Journal of Materials in Civil Engineering, 28 (2016) 04016152. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001665
[20]. B. Ye et al., Effect of water to binder ratio and sand to binder ratio on shrinkage and mechanical properties of high-strength engineered cementitious composite, Construction and Building Materials, 226 (2019) 899-909. https://doi.org/10.1016/j.conbuildmat.2019.07.303
[21]. Y. Yang et al., Effects of water/binder ratio on the properties of engineered cementitious composites, Journal of Wuhan University of Technology-Mater. Sci. Ed., 25 (2010) 298-302. https://doi.org/10.1007/s11595-010-2298-7
[22]. T. P. Huynh et al., Experimental research on the performance of polypropylene fiber foamed ultra-lightweight composites, Civil Engineering and Architecture, 8 (2020) 654-661. https://doi.org/10.13189/cea.2020.080429
[23]. C. Liu et al., Water-resistance properties of high-belite sulphoaluminate cement-based ultra-light foamed concrete treated with different water repellents, Construction and Building Materials, 228 (2019) 116798. https://doi.org/10.1016/j.conbuildmat.2019.116798
[24]. D. Mostofinejad, M. R. Nikoo, S. A. Hosseini, Determination of optimized mix design and curing conditions of reactive powder concrete (RPC), Construction and Building Materials, 123 (2016) 754-767. https://doi.org/10.1016/j.conbuildmat.2016.07.082
[25]. Y. Peng et al., Properties and microstructure of reactive powder concrete having a high content of phosphorous slag powder and silica fume, Construction and Building Materials, 101 (2015) 482-487. https://doi.org/10.1016/j.conbuildmat.2015.10.046
[26]. K. L. Chung, M. Ghannam, C. Zhang, Effect of specimen shapes on compressive strength of engineered cementitious composites (ECCs) with different values of water-to-binder ratio and PVA fiber, Arabian Journal for Science and Engineering, 43 (2018) 1825-1837. https://doi.org/10.1007/s13369-017-2776-8
[27]. C. M. Tam et al., Assessing drying shrinkage and water permeability of reactive powder concrete produced in Hong Kong, Construction and Building Materials, 26 (2012) 79-89. https://doi.org/10.1016/j.conbuildmat.2011.05.006
[28]. A. Fernandez-Jimenez, A. Palomo, Composition and microstructure of alkali activated fly ash binder: Effect of the activator, Cement & Concrete Research, 35 (2005) 1984–1992. https://doi.org/10.1016/j.cemconres.2005.03.003
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Kiểu trích dẫn
Vu Viet, H., Nguyen Tuan, C., Nguyen Huu, D., Ngo Nguyen Ngoc, T., & Huynh Trong, P. (1631638800). Experimental evaluation on engineering properties and microstructure of the high-performance fiber-reinforced mortar with low polypropylene fiber content. Tạp Chí Khoa Học Giao Thông Vận Tải, 72(7), 824-840. https://doi.org/10.47869/tcsj.72.7.5
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