Partial Interaction Model of Flexural Behavior of PVA Fiber–Reinforced Concrete Beams with GFRP Bars

Xie, Tianyu; Ali, M.S. Mohamed; Visintin, Phillip; Oehlers, Deric J.

doi:10.1061/(asce)cc.1943-5614.0000878

Cited by 24 publications

(7 citation statements)

References 45 publications

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“…The test results showed that PVA‐FRC beams were consistent with the plane section assumption and the theoretical deflection formula of PVA‐FRC beam was derived. Xie et al [ 33 ] researched the flexural behavior of PVA‐GFRP reinforced concrete beams, and the predicted deflection and crack width were close to the experimental results.…”

Section: Introductionmentioning

confidence: 60%

Flexural behavior of PVA‐FRC GFRP reinforced concrete beams

et al. 2021

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Fiber reinforced concrete beams are a popular research topic because of the improvement in the performance of concrete beams with fibers. PVA‐FRC GFRP reinforced concrete beams have better mechanical properties than those of ordinary reinforced concrete beams when considering the combination of multidirectional material properties. This article presents the results of an experimental study on the flexural behavior of PVA‐FRC GFRP reinforced concrete beams. Seven GFRP concrete beams were tested. The test variables included the PVA fiber content and GFRP diameter. The test results indicated that the existence of GFRP bars is effective for enhancing the load‐carrying capacity of RC beams and that PVA fibers can substantially inhibit the development of cracks in PVA‐FRC GFRP reinforced concrete beams and increase the midspan deflection. The experimental midspan deflection and maximum crack widths are also compared with theoretical predictions using new guidelines from the American Concrete Institute. Finally, the maximum crack correction formula for PVA‐FRC GFRP reinforced concrete beams is proposed.

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Section: Introductionmentioning

confidence: 60%

Flexural behavior of PVA‐FRC GFRP reinforced concrete beams

et al. 2021

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“…The four concrete mixes were prepared, namely normal concrete mix (M-Con), a concrete mix containing 50% PVC fine aggregates of total fine aggregate volume (M-PVC50), a concrete mix containing 75% PVC fine aggregates of total fine aggregate volume (M-PVC75), and concrete mix containing 75% PVC fine aggregates of total fine aggregate volume (M-PVC75-PVA) with 0.15 PVA-to-cement ratio (by weight) (p/c). Besides, the PVA is a grainy white powder soluble in water to represent a fluid gel added to the concrete mix to enhance the mechanical properties of the concrete [29,39,40]. The quantities of concrete mixes are listed in Table 4.…”

Section: Concrete Mixesmentioning

confidence: 99%

“…Therefore, two approaches were used to strengthen the slabs with PVC fine aggregates. The first approach uses PVA to increase the strength capacity of concrete by improving the internal curing [39], as shown in Figure 4f, while the second approach uses two fiber wire mesh layers as an additional reinforcement (see Figure 4g) [41,42]. The embedding fiber wire mesh at the top surface contributes as additional reinforcement in a tension zone, while the bottom fiber wire mesh provides confinement in the compression zone to enhance Moreover, a total thickness replacement of 75% sand volume with PVC fine waste aggregates was studied (see Figure 4e).…”

Section: Apparatusmentioning

confidence: 99%

Structural Behavior of Reinforced Concrete Slabs Containing Fine Waste Aggregates of Polyvinyl Chloride

et al. 2021

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In several areas worldwide, the high cost and shortage of natural resources have encouraged researchers and engineers to explore the serviceability and feasibility of using recycled aggregates in concrete mixtures, substituting a normal aggregate percentage. This technique has advantages for the environment by reducing the accumulation of waste materials, while it impacts the fresh and hardened concrete performances, reducing workability, flexural strength, compressive strength, and tensile strength. However, most studies have investigated the influence of replacing normal aggregates with waste aggregates on the concrete mechanical properties without examining the impact of using waste materials on concrete structural performance. The aim of this research is to investigate the effect of replacing 75% of sand volume with polyvinyl chloride (PVC) fine waste aggregates on the performance of reinforced concrete slabs. Different thicknesses of the concrete layer (0%, 25%, 50%, and 100% of slab thickness) containing PVC fine waste aggregates are investigated. Based on the reductions in the toughness and flexural strength capacity due to incorporating 75% PVC fine aggregate dosage, two approaches are used to strengthen the slabs with 75% PVC fine aggregates. The first approach is adding polyvinyl alcohol (PVA) to the PVC fine aggregate concrete mix to improve the mechanical properties of the concrete. The PVA increases the water viscosity in the concrete, which reduces the dry out phenomenon. With that said, the PVA modified fresh concrete does enable the use of the limits of the PVC fine aggregate dosage for high dosage plastic aggregate concrete. The second approach uses two fiber wire mesh layers as an additional reinforcement in the tested slab. Results show that the PVC-30 slab exhibits an 8% decrease in total area toughness compared to the control (Con) slab, while for PVC-60 slab toughness, the total area shows 26% less. Additionally, the inclusion of PVA in the concrete with 75% PVC plastic waste fine aggregate replacement greatly influences the pre-and post-cracking ductile performance among other slabs, representing that using PVA with higher contents might increase the flexural performance. Therefore, due to the substantial effect of PVA material on the concrete flexural performance, it is proposed to utilize PVA with an optimum PCV fine aggregate dosage in the concrete mix.

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“…5 3 13 mm) (Baena et al, 2009). Using this bond length, it is anticipated that the bond stress reached at the failure stage should be close to the actual local bond stress (Xie et al, 2018). To ensure the designed bond length can be achieved, PVC tubes were pre-fixed at the designated location on the reinforcing bar before casting concrete.…”

Section: Direct Pullout Testmentioning

confidence: 99%

A study of the bond behavior of FRP bars in MPC seawater concrete

Sun

Zheng

Zhou

et al. 2020

Advances in Structural Engineering

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Using magnesium potassium phosphate cement (MPC) and fiber-reinforced polymer (FRP) bar to produce reinforced concrete can overcome the durability problems facing conventional steel reinforced PC concrete. In addition, FRP bar reinforced MPC concrete can also mitigate the CO2 emission issues caused by Portland cement (PC) production and the shortage of natural resources such as virgin aggregates and freshwater. This paper, therefore, is aimed at investigating the bond behavior of the FRP bars in MPC seawater concrete. The direct pullout tests were conducted with a steel bar, BFRP bar, and GFRP bar embedded into different concretes. The effects of reinforcing bars, type of concrete and mixing water on the bond behavior of FRP and steel bars were investigated and discussed. The results showed that the MPC concrete increases the bond strength of BFRP and GFRP bars by 51.06% and 24.42%, respectively, compared with that in PC concrete. Using seawater in MPC concrete can enhance the bond strength of GFRP bar by 13.75%. The damage interface of the FRP bar -MPC is more severe than that of PC with a complete rupture of the FRP ribs and peeling-off of the resin compared to that in steel reinforced MPC specimens. Moreover, the bond stress-slip models were developed to describe the bond behavior of MPC-FRP specimen, and the analytical results match well with the experimental data. In conclusion, the FRP bars showed better bond behavior in the MPC seawater concrete than that in the PC counterparts.

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Partial Interaction Model of Flexural Behavior of PVA Fiber–Reinforced Concrete Beams with GFRP Bars

Cited by 24 publications

References 45 publications

Flexural behavior of PVA‐FRC GFRP reinforced concrete beams

Flexural behavior of PVA‐FRC GFRP reinforced concrete beams

Structural Behavior of Reinforced Concrete Slabs Containing Fine Waste Aggregates of Polyvinyl Chloride

A study of the bond behavior of FRP bars in MPC seawater concrete

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