Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

Özalp, Fatih; Yilmaz, Halit; Akcay, Burcu

doi:10.1007/s11709-022-0828-y

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…11b) only shows a tendency to peel off but does not really happen, and its surface only has a small number of cracks. The reason may be due to the constraint of recycled CFRP fibers on cement and the bridging effect on initial cracks [26]. The compression testing was conducted on specimens at 7 days, 28 days, and 120 days of age.…”

Section: Compressive Strengthmentioning

confidence: 99%

Reinforcement Effect of Recycled CFRP on Cement-Based Composites: With a Comparison to Commercial Carbon Fiber Powder

Huang,

Zhang,

et al. 2024

SDHM

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In this paper, recycled carbon fiber reinforced polymer (CFRP) mixture (CFRP-M, including recycled carbon fiber and powder) and refined recycled CFRP fiber (CFRP-F, mostly recycled carbon fiber) were added to cement to study the influence of addition on the flexural strength, compressive strength, and fluidity of cement-based materials. The recycled CFRP were prepared by mechanically processing the prepreg scraps generated during the manufacture of CFRP products. For comparison, commercial carbon fiber powder was also added in cement and the performance was compared to that of addition of recycled CFRP. The hydration products and strengthening mechanism of cement-based materials were analyzed by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). The results show that the recycled CFRP has limited impact on the compressive strength but has an obvious improvement in the flexural strength of cement-based composites. Notably, CFRP-F is superior to CFRP-M in the reinforcement of cement-based materials. When the mass content of CFRP-F is 5%, the fluidity is 100 mm, and the flexural strength of specimens can be increased by up to 43.55%. Through XRD, FTIR, and SEM analysis, it is found that the main mechanism of recycled CFRP reinforced cement-based materials is the "bridging effect" induced by fibers and can prevent or delay the development of cracks. The recycled CFRP has no influence on the hydration process and will not introduce any new hydration products. Current research not only provides a theoretical basis for the design and use of recycled CFRP to reinforce cement-based composites but also offers a solution to relieve environmental pressure and improve resource utilization.

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Section: Compressive Strengthmentioning

confidence: 99%

Reinforcement Effect of Recycled CFRP on Cement-Based Composites: With a Comparison to Commercial Carbon Fiber Powder

Huang,

Zhang,

et al. 2024

SDHM

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“…where δ lim is a prescribed deflection limit. Ozalp et al 61 recommended a limiting deflection of 10 mm as cut-off point for steel fiber reinforced concrete. Barros et al 62 suggested this deflection as 3 mm which is important from the design perspective.…”

Section: Fracture Energy and Characteristic Lengthmentioning

confidence: 99%

Mechanical and fractural characteristics of structural lightweight fiber reinforced concrete

Esmaeili

Ghaffarinia

Nodehi

et al. 2022

Structural Concrete

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Recent advances in the development of high-performance insulating composite materials have created a new trend in the construction industry for the production of optimized lightweight structural sections. Although such sections are often found to have enhanced strength-to-weight ratio, their lower fracture resistance and toughness are commonly known to prone lightweight concrete sections to brittle failure with a low capacity to withstand crack propagation.To address this, in this study, six mixes containing lightweight expanded clay aggregates with a small quantity of hooked steel fibers ranging from 0 to 1.15 vol% are produced. As a result, it is found that the inclusion of steel fibers at 1.15 vol% can increase fracture energy and characteristic length by about 20 and 11 times, respectively. The result of this study is found to be significant and point to the development of highly ductile, structural-grade lightweight fiber reinforced concrete through the use of hooked steel fibers.

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Ultra-high-performance fiber reinforced concrete review: constituents, properties, and applications

Sanya

Shi

2023

Innov. Infrastruct. Solut.

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Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

Cited by 5 publications

References 24 publications

Reinforcement Effect of Recycled CFRP on Cement-Based Composites: With a Comparison to Commercial Carbon Fiber Powder

Reinforcement Effect of Recycled CFRP on Cement-Based Composites: With a Comparison to Commercial Carbon Fiber Powder

Mechanical and fractural characteristics of structural lightweight fiber reinforced concrete

Ultra-high-performance fiber reinforced concrete review: constituents, properties, and applications

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