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Experimental Study of Effects of Fly Ash On the Mechanical Properties of Hybrid Fiber Reinforced Cementitious Composite | ||
| AUT Journal of Civil Engineering | ||
| مقاله 5، دوره 4، شماره 2، شهریور 2020، صفحه 185-198 اصل مقاله (1.47 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2019.15929.5556 | ||
| نویسندگان | ||
| ahmad dalvand* 1؛ Ahmad Reza SatariFard2 | ||
| 1assistant professor, faculty of engineering, lorestan university,khorramabad, iran | ||
| 2Graduated MS of Structural Engineering, Department of Engineering, Science and Research Branch, Islamic Azad university, Tehran, Iran | ||
| چکیده | ||
| Fibers are increasingly used for enhancement of the tensile strength of conventional concrete. Using fiber cementitious composite as well as microfiber and PVA fibers can be considered to improve the mechanical property of self-compacting concretes. This study considers the mechanical properties of high-performance Hybrid fiber reinforced cementitious composite specimens, which are reinforced by micro steel fibers, PVA, and a combination of them. In order to achieve the study goals, 10 mixture ratios were considered. All mixtures underwent compressive, tensile, and flexural strength tests as well as ultrasonic pulse velocity tests. The compressive strength, tensile, and flexural strength tests were performed on cubes (100x100x100mm), cylindrical (100x200mm) and prismatic beams (320x80x60mm), respectively. Also, ultrasonic pulse velocity testing was carried out on cubic (100x100x100mm) specimens. Results of these tests exhibit high variability and vary considerably for mixtures containing different fiber contents. Micro-steel fibers have a great effect on the mechanical strength of the specimens compared to PVA fibers. The specimens with a high percentage of micro-steel fibers showed higher resistance to the first flexural crack, failure, and final energy absorption compared to those with a high percentage of PVA.. In addition, by adding a pozzolanic material like fly ash, the 28-day resistance of all the mechanical properties of the specimens were reduced. | ||
| کلیدواژه‌ها | ||
| Pozzolanic material؛ Cementitious composite؛ Micro-steel fibers؛ PVA fibers | ||
| مراجع | ||
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[1] Faiz. UAS, Review of mechanical properties of short fibre reinforced geopolymer composites, Construction and Building Materials, 43 (2013) 37–49.
[2] A. Sadrmomtazi, Tahmouresi, B., Effect of Fiber on Mechanical Properties and Toughness of Self-Compacting Concrete Exposed to High Temperatures, AUT Journal of Civil Engineering, (2017) 153-166.
[3] Madani, H. Rostami, J., Norouzifar, M., H. Karimi Maleh, H, An Investigation on the Effect of Aggregates Packing Density on the Properties of High-Performance Concrete Mixtures, AUT Journal of Civil Engineering, (2017) 205-214.
[4] Pacheco-Torgal F., Abdollahnejad Z., Miraldo S., Baklouti S., Ding Y., An overview on the potential of geopolymers for concrete infrastructure rehabilitation, Construction and Building Materials, 36 (2012) 1053- 1058.
[5] Won-Chang Choi, Hyun-Do Yun, Joo-Won Kang, Sun-Woo Kim, Development of recycled strain-hardening cement-based composite (SHCC) for sustainable infrastructures, Composites, 43(2) (2012) 627- 635.
[6] Abdollahnejad, Zahra & Dalvand, A & Mastali, Mohammad & Luukkonen, Tero & Illikainen, Mirja, Effects of waste ground glass and lime on the crystallinity and strength of geopolymers, in: Magazine of Concrete Research, 2018, pp. 1-38.
[7] Mastali, Mohammad & Dalvand, A & Sattarifard, A.R. & Abdollahnejad, Zahra & Nematollahi, Behzad & Sanjayan, J.G. & Illikainen, Mirja, A comparison of the effects of pozzolanic binders on the hardened-state properties of high-strength cementitious composites reinforced with waste tire fibers, (2019).
[8] Mastali, Mohammad & Dalvand, A & Sattarifard, A.R., The impact resistance and mechanical properties of the reinforced selfcompacting concrete incorporating recycled CFRP fiber with different lengths and dosages, Composites (2017).
[9] Li, V.C, From Micromechanics to Structural Engineering - the Design of Cementitous Composites for Civil Engineering Applications, JSCE Journal of Structural Mechanics and Earthquake Engineering, 10 (1993) 37-48.
[10] Fischer, G. Wang, S. Li, V.C, Design of engineered cementitious composites (ECC) for processing and workability requirements, in, Warsaw, Poland, 2003.
[11] Mastali, Mohammad & Dalvand, Ahmad, Use of silica fume and recycled steel fibers in self-compacting concrete (SCC), Construction and Building Materials (2016).
[12] Jiaqing Wang, Qingli Dai, Ruizhe Si, Shuaicheng Guo, Investigation of properties and performances of Polyvinyl Alcohol (PVA) fiberreinforced rubber concrete, Construction and Building Materials, 193 (2018) 631- 642.
[13] Yuan Qin, Xianwei Zhang, Junrui Chai, Zengguang Xu, Shouyi Li, Experimental study of compressive behavior of polypropylenefiber- reinforced and polypropylene-fiber-fabric-reinforced concrete, Construction and Building Materials, 194 (2019) 216-225.
[14] F. Aslani, S. Nejadi, Self-compacting concrete incorporating steel and polypropylene fibers: compressive and tensile strengths, moduli of elasticity and rupture, compressive stress–strain curve, and energy dissipated under compression, Composites, 53 121–133.
[15] Mehran Khan, Mingli Cao, Majid Ali, Effect of basalt fibers on mechanical properties of calcium carbonate whisker-steel fiber reinforced concrete, Construction and Building Materials, 192 (2018) 742-753.
[16] Ali Nassir Al-Gemeel, Yan Zhuge, Using textile reinforced engineered cementitious composite for concrete columns confinement, Composite Structures, 210 (2019) 695-706.
[17] Farhad Aslani, Lining Wang,Fabrication and characterization of an engineered cementitious composite with enhanced fire resistance performance, Cleaner Production, (2019).
[18] S. Pourfalah, Behaviour of engineered cementitious composites and hybrid engineered cementitious composites at high temperatures, Construction and Building Materials, 158 (2018).
[19] ASTM C39, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens.
[20] ASTM C496, Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens.
[21] ASTM C496, Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Center-Point Loading).
[22] ASTM C1018, Standard Test Method for Flexural Toughness and FirstCrack Strength of Fiber-Reinforced Concrete (Using Beam with ThirdPoint Loading).
[23] 23ASTM C1609, Standard Test Method for Flexural Performance of FiberReinforced Concrete (Using Beam with Third-Point Loading).
[24] ASTM C597, Standard Test Method for Pulse Velocity through Concrete. | ||
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