Mechanical and fractural characteristics of structural lightweight fiber reinforced concrete

Esmaeili, Jamshid; Ghaffarinia, Mahdi; Nodehi, Mehrab; Gençel, Osman; Shi, Jinyan; Ozbakkaloglu, Togay

doi:10.1002/suco.202200107

Cited by 10 publications

(4 citation statements)

References 58 publications

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“…Nirubha et al 15 improved the mechanical properties and durability of concrete by replacing part of the cement with dolomitic sand and nano-SiO 2 . Esmaeili et al 16 incorporated lightweight bentonite and steel fibers into concrete, improved the cracking resistance, and delayed the cracking time of concrete. Naran et al 17 used waste plastics, FA, and recycled glass powder as additives to concrete.…”

Section: Introductionmentioning

confidence: 99%

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Yang,

Yu,

et al. 2024

Sci Rep

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Ultra-high-rise buildings require high concrete bearing capacity. Ordinary concrete often fails to meet the project requirements. Admixture of admixtures in concrete is a means of solution. Currently, studies on the incorporation of basalt fiber (BF) and fly ash (FA) in concrete are relatively mature. However, research on incorporating nano-Titanium Carbide (nano-TiC) in concrete is still relatively scarce, which has a lot of room for development. To further improve the mechanical properties of concrete, BF, and FA synergized with nano-TiC were incorporated into concrete to produce TBF concrete in this study. And Response Surface Methodology (RSM) was used to optimize the mechanical properties of concrete. The collapse and compressive deformation damage characteristics of concrete were analyzed. The microstructure of the cement matrix was analyzed by the SEM (Scanning Electron Microscope). An optimization model of the TBF concrete craving function was developed. Optimized ratios with compressive, split tensile, and flexural strengths as response objectives were obtained, and the accuracy of the optimized ratios was investigated using the same experimental conditions. The results of the study showed that FA increased the collapse of concrete, while nano-TiC and BF decreased the collapse of concrete. Under uniaxial compression, nano-TiC, FA, and BF together incorporated into concrete can improve its compressive damage state. Moderate amounts of nano-TiC, BF, and FA could improve the mechanical properties of concrete. Their optimal mixing ratio admixtures were 0.88%, 0.24%, and 5.49%, respectively. And the measured values under the same conditions were compared with the predicted values. The maximum difference in compressive strength was 6.09%. The maximum difference in split tensile strength was 7.14%. The maximum difference in flexural strength was 8.45%. This indicated that the accuracy of the RSM optimization model was good. A moderate amount of nano-TiC, FA, and BF could improve the densification of concrete.

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Section: Introductionmentioning

confidence: 99%

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Yang,

Yu,

et al. 2024

Sci Rep

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“…Improving the brittleness and flexural strength and toughness of concrete by adding fibers is one of the most common methods for toughening concrete at this stage, [15][16][17][18][19] which is known as fiber-reinforced concrete (FRC). The addition of fiber can force the extension path of the crack tip in the concrete to change or make expected large cracks become an increasingly subtle crack field, increasing the energy consumed for crack development and playing a role in crack resistance and toughening.…”

Section: Introductionmentioning

confidence: 99%

Study on the flexural properties and fiber‐selection method of fiber‐reinforced geopolymer concrete

Zhao

Wang

et al. 2022

Structural Concrete

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In order to study the effect of different types of fibers on the bending properties of geopolymer concrete (GPC), a series of fiber‐reinforced geopolymer concrete (FRGPC) samples were prepared, and their flexural properties were evaluated by four point bending test and bending toughness evaluation index. Then, based on the fiber characteristic value (λ), a new bending strength prediction model and a three‐dimensional (3D) curved surface prediction model of the bending toughness of FRGPC are proposed and fitted. Finally, a new method for the selection of fibers in GPC is designed by calculating the derivative of the quadratic relationship between fiber reinforcement factor (S) and λ. The results show that all types of fibers have a certain effect on improving the bending strength of GPC samples, and the lifting rate is end‐hook steel fiber (SF), basalt fiber (BF), and short polyethylene polypropylene fiber (SPPF), from high to low. Mixing the above types of fibers with long polypropylene fibers (LPPF) will produce better performance. Among them, the hybrid fiber‐containing SF has the best performance. The bending performance prediction model deduced in this paper has a good correlation coefficient, which can be used to predict the bending performance of FRGPC. By making dS/dλ = 0 can calculate the optimal λ, and this λ can maximize the parameter S and guide the selection of optical fibers.

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“…[4][5][6] Low cost, ease of use, and promising results are the main reasons for the benefit of fibers in concrete materials. [7][8][9] The addition of fiber is a common method for reinforcing the concrete. Compared to ordinary cement concrete, fiber reinforced concrete is more robust, more durable, and has much higher tensile, flexural, and compressive strength, leading to less material required for constructing the structures made of cement concrete.…”

Section: Introductionmentioning

confidence: 99%

“…In this condition, fibers are a suitable component to overcome many of these disadvantages 4–6 . Low cost, ease of use, and promising results are the main reasons for the benefit of fibers in concrete materials 7–9 …”

Section: Introductionmentioning

confidence: 99%

Effect of water to cement (W/C) ratio and age on mechanical behavior of tire‐recycled steel fiber reinforced concrete

Karimi

Ebneabbasi

Karamzadeh

et al. 2022

Structural Concrete

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The annual entrance of billions of used tires into landfills has caused tremendous environmental concerns, while the recycled steel fibers from these tires can improve the mechanical characteristics of construction materials, including cement concrete. In this paper effect of the addition of recycled steel fibers on mechanical characteristics of ordinary cement concrete with different water to cement ratios are studied; to achieve that, compressive and flexural specimens are exanimated using standard test methods with four general mix designs. The range of recycled steel fibers is chosen as 0%, 1%, 2%, 3%, and 4% (per unit weight), and optimal fiber percentages based on water to cement ratios are also calculated. Results show that using recycled steel fibers positively affects all the mix designs, especially ductility, and postfracture energy absorption increases with the increase of fiber content. Fiber addition increases the compressive and flexural strength by about 25% and 58%, respectively. Depending on the water to cement ratio, the optimum percentage of recycled steel fiber for concretes with 0.6, 0.5, and 0.4 water to cement ratios are 3.0%, 2.3%, and 1.8% of unit weight, respectively. K E Y W O R D Scompressive and flexural strength, fiber-reinforced concrete, green environment, mix-design, recycled steel fiber

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Mechanical and fractural characteristics of structural lightweight fiber reinforced concrete

Cited by 10 publications

References 58 publications

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Study on the flexural properties and fiber‐selection method of fiber‐reinforced geopolymer concrete

Effect of water to cement (W/C) ratio and age on mechanical behavior of tire‐recycled steel fiber reinforced concrete

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