Crack propagation behavior of ultra-high-performance concrete (UHPC) reinforced with hybrid steel fibers under flexural loading

Niu, Yanfei; Wei, Jiangxiong; Jiao, Chujie

doi:10.1016/j.conbuildmat.2021.123510

Cited by 45 publications

(29 citation statements)

References 20 publications

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“…The magnified image of the crack tip is shown in Figure 8 . The area around the crack tip can be divided into four regions based on the strain field: (I) the compression region below the loading point (green region), (II) the fracture process zone (yellow zone), (III) the microcrack initiation stage region, and (IV) the macroscopic crack propagation region visible to the naked eye [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Bending and Crack Evolution Behaviors of Cemented Soil Reinforced with Surface Modified PVA Fiber

Liang¹,

2022

Materials

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To improve the flexural properties of cemented soils reinforced with fibers and avoid their brittle failure when subjected to complex loading conditions, a simple and cost-effective technique was explored to facilitate their application in retaining walls. In this study, how different fiber surface modifications, i.e., alkali treatment, acid treatment and silane coupling agent treatment, as well as different fiber contents, i.e., 0%, 0.25%, 0.5% and 1%, affect the bending properties of cemented soils was investigated by conducting three-point bending tests on notched beams. The digital image correlation (DIC) technology was used to examine the crack propagation process and the strain field distribution of cracks in specimens in the flexural tests. The results show that all fiber surface modifications increased peak strength and fracture energy, for example, the fracture energy of specimens AN1, AH1 and AK1 was increased by 180.4%, 121.5% and 155.4%, respectively, compared to PVA1. In addition, the crack tip strain, crack propagation rate and the initial crack width of the modified specimens were lower than those before modification. Lastly, scanning electron microscope (SEM) and mercury intrusion porosimetry tests were adopted to reveal the mechanism of bending performance in cemented soils reinforced by fiber surface modifications.

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Section: Resultsmentioning

confidence: 99%

Bending and Crack Evolution Behaviors of Cemented Soil Reinforced with Surface Modified PVA Fiber

Liang¹,

2022

Materials

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“…The loading setup is shown in Figure 2. A specimen with dimensions of 100 mm × 100 mm × 400 mm and a span of 300 mm was selected, as in the previous work [24,25]. Loading direction is perpendicular to the interface.…”

Section: Flexural Testingmentioning

confidence: 99%

“…Detailed information about the DIC system can be found in the literature [30]. previous work [24,25]. Loading direction is perpendicular to the interface.…”

Section: Digital Image Correlationmentioning

confidence: 99%

“…However, these methods require high testing environment and are difficult to perform full-field measurements in ordinary laboratories. The digital image correlation (DIC) technique has the advantages of full-field non-contact measurement and high accuracy, thus is widely used to observe crack propagation behavior [24][25][26]. For example, Ghafoori et al [27] accurately quantified the crack propagation behavior of FRCM by the DIC technique.…”

Section: Introductionmentioning

confidence: 99%

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Study of Flexural and Crack Propagation Behavior of Layered Fiber-Reinforced Cementitious Mortar Using the Digital Image Correlation (DIC) Technique

Meng

Liu

et al. 2021

Materials

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By optimizing the distribution of steel fibers in fiber-reinforced cementitious mortar (FRCM) through the layered structure, the role of fibers can be fully utilized, thus improving the flexural behavior. In this study, the flexural behavior of layered FRCM at different thicknesses (25 mm, 50 mm, 75 mm, 100 mm) of the steel fiber layer was investigated. The evolution of the crack propagation behavior was analyzed using the digital image correlation (DIC) technique. The results showed that the steel fiber layer thickness of 75 mm has the best flexural behavior. Moreover, the crack propagation path is more tortuous. The maximum value of crack opening displacement (COM) increases with the increase in fiber thickness. In addition, increasing the bottom layer thickness can increase the height of the tensile zone, but the interface inhibits the increase of the tensile zone.

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“…Concrete reinforcement with fibers is not a substitute for traditional steel reinforcing bars because steel bars and fibers serve distinctive, but both function in improving the concrete performance [ 36 , 37 , 38 ]. Steel fiber-reinforced concrete (SFRC) refers to the inclusion of short, discontinuous steel fibers into the matrix of concrete after mixing [ 39 , 40 , 41 ]. Water, aggregates, cement, and steel fibers are the primary components of SFRC [ 42 , 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Steel Fiber-Reinforced Concrete: A Systematic Review of the Research Progress and Knowledge Mapping

et al. 2022

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This study performed a scientometric-based examination of the literature on steel fiber-reinforced concrete (SFRC) to identify its key elements. Typical review papers are limited in their capacity to link distinct segments of the literature in an organized and systematic method. The most challenging aspects of current research are knowledge mapping, co-occurrence, and co-citation. The Scopus search engine was used to search for and obtain the data required to meet the goals of the study. During the data evaluation, the relevant publication sources, keyword assessment, productive authors based on publications and citations, top papers based on citations received, and areas vigorously involved in SFRC studies were recognized. The VOSviewer software tool was used to evaluate the literature data from 9562 relevant papers, which included citation, abstract, bibliographic, keywords, funding, and other information. Furthermore, the applications and constraints related to the usage of SFRC in the construction sector were examined, as well as potential solutions to these constraints. It was determined that only 17 publication sources (journals/conferences) had published at least 100 articles on SFRC up to June 2022. Additionally, the mostly employed keywords by authors in SFRC research include steel fibers, fiber-reinforced concrete, concrete, steel fiber-reinforced concrete, and reinforced concrete. The assessment of authors revealed that 39 authors had published at least 30 articles. Moreover, China, the United States, and India were found to be the most active and participating countries based on publications on SFRC research. This study can assist academics in building collaborative initiatives and communicating new ideas and techniques because of the quantitative and graphical depiction of participating nations and researchers.

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Crack propagation behavior of ultra-high-performance concrete (UHPC) reinforced with hybrid steel fibers under flexural loading

Cited by 45 publications

References 20 publications

Bending and Crack Evolution Behaviors of Cemented Soil Reinforced with Surface Modified PVA Fiber

Bending and Crack Evolution Behaviors of Cemented Soil Reinforced with Surface Modified PVA Fiber

Study of Flexural and Crack Propagation Behavior of Layered Fiber-Reinforced Cementitious Mortar Using the Digital Image Correlation (DIC) Technique

Steel Fiber-Reinforced Concrete: A Systematic Review of the Research Progress and Knowledge Mapping

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