Experimental investigation on mechanical properties of glass fiber reinforced recycled aggregate concrete under uniaxial cyclic compression

Chen, Yuliang; He, Qin; Liang, Xin; Jiang, Rui; Li, Hong

doi:10.1016/j.clema.2022.100164

Cited by 18 publications

(7 citation statements)

References 41 publications

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“…By comparing Figure 5e–g, it can be seen that the crack width of R100P9V2 is the smallest, indicating that adding an appropriate amount of fiber can reduce the crack width of PFRAC cracking. Compared with SF recycled concrete, 36 the macroscopic crack width of PF recycled concrete is larger, the middle of the specimen has an outward bulging damage pattern, and its surface contains more “fish scale” cracks. This was due to the bridging effect of PF at the cracks, which improved the crack resistance and deformation capacity of the concrete matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Research shows that incorporating fibers can effectively solve the bottleneck problem that the brittleness of RAC is higher than that of NAC 19 ; adding GFs can improve the ductility and hysteretic energy dissipation of recycled concrete and affect the stiffness degradation of recycled concrete. 20 Compared with other fibers, PF has the advantages of good durability, more economical, corrosion resistance, high stability, and hydrophobicity, which can extend the service life of the concrete. 21 With the development of research in the field of concrete, PFs have gradually started to be used in concrete structures.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the main types of fibers researched are SF, polypropylene fiber (PF), glass fiber (GF), carbon fiber (CF), and so on. Research shows that incorporating fibers can effectively solve the bottleneck problem that the brittleness of RAC is higher than that of NAC 19 ; adding GFs can improve the ductility and hysteretic energy dissipation of recycled concrete and affect the stiffness degradation of recycled concrete 20 …”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of short polypropylene fiber enhanced recycled concrete under cyclic compression

Zhu

Chen

et al. 2023

Structural Concrete

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This study investigated the mechanical properties and stress–strain relationship of polypropylene fiber recycled aggregate concrete (PFRAC) subjected to uniaxial cyclic compression. A total of 78 cylindrical specimens were designed for uniaxial cyclic compression test with coarse aggregate replacement rate, polypropylene fiber volume fraction, and loading rate as variation parameters. The failure process of the specimens under cyclic loading was observed and recorded. The stress–strain curve of PFRAC was summarized. The important mechanical properties of PFRAC were obtained, such as plastic strain, accumulated energy dissipation. The microstructure of PFRAC was analyzed by scanning electron microscopy, and the crack resistance mechanism of PFRAC under cyclic loading was revealed. The results show that the PFRAC under cyclic loading appeared oblique splitting failure. The compressive stress–strain curve envelope of PFRAC subjected to cyclic loading exhibited similarity to the monotonic counterpart. The addition of polypropylene fibers can improve the peak stress, peak strain, residual stress, post‐peak ductility, and accumulated energy dissipation of the recycled concrete. In addition, a constitutive relation formula for the PFRAC stress–strain curve under cyclic loading is proposed, and the fitting result is good.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of short polypropylene fiber enhanced recycled concrete under cyclic compression

Zhu

Chen

et al. 2023

Structural Concrete

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“…The addition of steel fibers can improve the compressive, tensile, impact, and fatigue properties and the durability of concrete [14][15][16][17][18][19][20][21][22]. The steel fibers spanning across cracks prevent rapid crack propagation, significantly enhancing the flexural performance of concrete [23,24].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Wu,

Zhang,

Han

et al. 2024

Materials

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This paper explores the impact of steel–PVA hybrid fibers (S-PVA HF) on the flexural performance of panel concrete via three-point bending tests. Crack development in the concrete is analyzed through Digital Image Correlation (DIC) and Scanning Electron Microscope (SEM) experiments, unveiling the underlying mechanisms. The evolution of cracks in concrete is quantitatively analyzed based on fractal theory, and a predictive model for flexural strength (PMFS) is established. The results show that the S-PVA HF exhibits a synergistic effect in enhancing and toughening the concrete at multi-scale. The crack area of steel–PVA hybrid fiber concrete (S-PVA HFRC) is linearly correlated with deflection (δ), and it further reduces the crack development rate and crack area compared to steel fiber-reinforced concrete (SFRC). The S-PVA HF improves the proportional ultimate strength (fL) and residual flexural strength (fR,j) of concrete, and the optimal flexural performance of concrete is achieved when the steel fiber dosage is 1.0% and the PVA fiber dosage is 0.2%. The established PMFS of hybrid fiber-reinforced concrete (HFRC) can effectively predict the flexural strength of concrete.

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“…[15][16][17] Scholars have combined glass fiber with RAC to improve its mechanical behaviors due to its high modulus of elasticity, alkali resistance, tensile strength and hightemperature resistance. 18,19 According to Chen et al, 20 recycled glass fiber coarse aggregate concrete underwent uniaxial cyclic compression tests to determine its mechanical behaviors. According to the findings, GF was found to improve ductility of recycled concrete as well as dissipate hysteretic energy.…”

Section: Introductionmentioning

confidence: 99%

Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

Chen,

Wang,

Liang

et al. 2023

Structural Concrete

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This study aims to address the complex stress state commonly observed in concrete structures in practical engineering, as well as the challenges posed by resource scarcity and environmental pollution. To achieve this, a total of 168 cylinder specimens of glass fiber recycled coarse aggregate concrete (GFRAC) were designed for conventional triaxial compression tests. The analysis of the test results reveals that the application of lateral restraint force induces a shift in the failure mode of GFRAC from longitudinal splitting failure to plastic deformation failure, occurring either in the middle or at the end of the specimen. The lateral constraint force can effectively improve the stress and strain at the peak point of GFRAC and the modulus of elasticity of the specimen. The glass fiber increases the peak stress of the specimen, and the maximum growth rate is 20%. On the contrary, the glass fiber reduces the peak strain, and the maximum reduction is 49.66%. Increasing the replacement rate of recycled coarse aggregate will lead to a decrease in peak stress, with a maximum decrease of 19.17%. Glass fiber (GF) limits the appearance and propagation of cracks by bridging, pulling out or breaking. Finally, three different failure criteria are used to analyze the triaxial compression state of GFRAC from a macro perspective.

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Experimental investigation on mechanical properties of glass fiber reinforced recycled aggregate concrete under uniaxial cyclic compression

Cited by 18 publications

References 41 publications

Mechanical properties of short polypropylene fiber enhanced recycled concrete under cyclic compression

Mechanical properties of short polypropylene fiber enhanced recycled concrete under cyclic compression

Experimental Study on the Flexural Performance of Steel–Polyvinyl Alcohol Hybrid Fiber-Reinforced Concrete

Microscopic mechanism analysis and failure criterion study of glass fiber recycled concrete under three‐dimensional compressive stress state

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