Effect of Steel Fiber on Flexural Toughness and Fracture Mechanics Behavior of Ultrahigh-Performance Concrete with Coarse Aggregate

Zhang, Lihui; Liu, Jianzhong; Liu, Jiaping; Zhang, Qianqian; Han, Fangyu

doi:10.1061/(asce)mt.1943-5533.0002519

Cited by 71 publications

(21 citation statements)

References 43 publications

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“…The calculation results are shown in Table 4. As can be observed from The relative errors for equivalent flexural strength can be calculated using Equations (5) and (6), and the values of relative error are given in Table 5.…”

Section: Measurement Of Flexural Toughnessmentioning

confidence: 99%

“…In the study of Zhao et al [5], the toughening effect of PVA fiber on concrete was achieved at volume fraction of 1.5%. Zhang et al [6] investigated the effect of fiber types and hybrid modes on flexural toughness of UHPC with coarse aggregates and concluded that 1.0 vol.% hooked-end steel fibers blended with 1.0 vol.% smooth steel fibers produces the best flexural toughness. Rashiddadash et al [7] found that hybrid fiber reinforced concrete with 0.75 vol.% steel fibers and 0.25 vol.% polypropylene fibers has high flexural toughness.…”

Section: Introductionmentioning

confidence: 99%

“…In conclusion, flexural toughness is one of the key indexes to evaluate the practical engineering performance of HSC/HPC/UHPC including reactive powder concrete (RPC). The flexural toughness of concrete is enhanced by mixing steel fibers with different geometric sizes, hybrid steel fibers and organic fibers, and adding nano-materials in previous researches [1][2][3][4][5][6][7][8][9][10][11][12][13][14], making the preparation process of concrete complex and the production cost increase. Meanwhile, the addition of steel fibers with diameter larger than 0.22 mm generates weak interface zones in concrete [15][16][17], and the porosity of concrete is also increased due to the mixing incorporation of steel fibers and organic fibers [7].…”

Section: Introductionmentioning

confidence: 99%

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Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Dong

Zhou

Ashour

et al. 2019

Cement and Concrete Composites

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As a type of excellent reinforcing filler, super-fine stainless wire (SSW) can form widely distributed network in reactive powder concrete (RPC) to transfer crack tip stresses as well as inhibit the initiation and propagation of cracks, leading to significant improvement of flexural toughness of RPC. In this paper, the flexural toughness of RPC beams and plates reinforced with 1% and 1.5% by vol. of SSWs was investigated, and its calculation model was established according to the composite material theory. Experimental results showed that the flexural toughness of unnotched beams fabricated with RPC containing 1.5% SSWs is 146.5% higher than that of control RPC without SSWs according to load-deflection relationships. The equivalent flexural strength of notched RPC beams is enhanced by 80.0% as SSW content increases from 1% to 1.5%. The limitation ability of SSWs on crack mouth opening can be used to evaluate the flexural toughness of composites. An addition of 1.5% SSWs leads to 201.9% increase of flexural toughness of RPC plates in accordance with load-deflection relationships. The calculation model based on the composite material theory can accurately describe the toughening effect of SSWs on RPC beams and plates. The enhancement of flexural toughness of RPC caused by SSWs is beneficial for improving the safety of structures as well as broadening the engineering applications of composites.

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Section: Measurement Of Flexural Toughnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Dong

Zhou

Ashour

et al. 2019

Cement and Concrete Composites

View full text Add to dashboard Cite

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“…The mixtures with hybrid fibers showcased better differences in post cracking behavior. Even though basalt fibers prove to be dominant during the pre-peak behavior, post-peak behavior was mainly due to the combination of gap graded coarse aggregate in complement to the hooked end steel fibers (L. Zhang, Liu, Liu, Zhang, & Han, 2018). Figure 18.…”

Section: Flexural Toughnessmentioning

confidence: 99%

Development of hybrid steel-basalt fiber reinforced concrete – in aspects of flexure, fracture and microstructure

Jenifer

Dharmar

2021

rdlc

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The conventional concrete is considered to be critical in various constructional applications due to its setbacks such as service load failures, brittle property, low ductility and low tensile capacity. Apart from the natural bridging mechanism (aggregate bridging), an additional bridging mechanism is necessary to overcome the existing setbacks in plain cement concrete. Thus concrete with one or more types of fibers in suitable combinations can augment the mechanical performance of concrete causing a positive synergy effect. Along with the two control mixes with and without copper slag as partial replacement of fine aggregate, two different groups of hybrid combination of fibers such as steel and basalt were cast with 3 different groups of coarse aggregate proportions of sizes 20 mm and 12.5 mm. The hybridization of fibers is assessed in this study under compression, tension, flexure and fracture. Stress-strain data were recorded under compression to validate the strain capacity of the mixtures. The mechanical properties were analyzed for the positive hybrid effect and the influencing factors were copper slag, hybrid fiber combination and coarse aggregate proportions. The optimum volume fraction of fibers and mix proportions were highlighted based on various behaviors of concrete. Steel as macro fibers and basalt as microfibers were examined under microstructural studies (SEM and EDX). The results from the flexural toughness showcased the potential of hybrid fibers with greater energy absorption capacity ensuring the ductile property of the proposed hybrid fiber reinforced concrete.

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“…Nune et al’s later research was mainly emphasizing on the detection of uniformly distributed UHPFRC by aligning the fibres with an intense magnetic field [ 23 , 24 ], but the intrinsic heterogeneity of fibre distribution had been proved to largely affect the tensile response of fibre reinforced concrete [ 25 ]. Moreover, recent studies were mainly focusing on the relationship between fibre content and flexural performance [ 26 , 27 ]. Therefore, both the local fibre spatial and orientation distribution should be taken into consideration, but this area still needs further investigation.…”

Section: Introductionmentioning

confidence: 99%

Fibre Distribution Characterization of Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC) Plates Using Magnetic Probes

Xia

Chin

et al. 2020

Materials

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Ultra-high performance fibre reinforced concrete (UHPFRC) is an innovative cement-based engineering material. The mechanical properties of UHPFRC not only depend on the properties of the concrete matrix and fibres, but also depend on the interaction between these two components. The fibre distribution is affected by many factors and previous researchers had developed different approaches to test the fibre distribution. This research adopted the non-destructive C-shape ferromagnetic probe inductive test and investigated the straight steel fibre distribution of the UHPFRC plate. A simplified characterization equation is introduced with an attenuation factor to consider the different plate thicknesses. The effective testing depth of this probe was tested to be 24 mm. By applying this method, fibre volume content and the fibre orientation angle can be calibrated for the entire plate. The fibre volume content generally fulfilled the design requirement. The fibre orientation angle followed a normal distribution, with a mean value of 45.60°. By testing small flexural specimens cut from the plates, it was found out that the mechanical performance (peak flexural strength) correlates with the product of fibre volume content and cosine fibre orientation angle.

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Effect of Steel Fiber on Flexural Toughness and Fracture Mechanics Behavior of Ultrahigh-Performance Concrete with Coarse Aggregate

Cited by 71 publications

References 43 publications

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Development of hybrid steel-basalt fiber reinforced concrete – in aspects of flexure, fracture and microstructure

Fibre Distribution Characterization of Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC) Plates Using Magnetic Probes

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