Corrosion effects on the flexural performance of prestressed reinforced concrete beams

Imperatore, Stefania; Benenato, Armando; Spagnuolo, Simone; Ferracuti, Barbara; Kioumarsi, Mahdi

doi:10.1016/j.conbuildmat.2023.134581

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…However, the reinforcing steel is prone to corrosion in damp or salty environments. Issues like inadequate concrete cover, poor design or construction practices, improper concrete mixes [15], and corrosive conditions can compromise concrete's protective role [16,17], increasing the risk of reinforcement corrosion [18,19]. As corrosion begins, structural integrity gradually deteriorates over time.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Fracture Behavior in Single-Edge Notched Beams Reinforced with Steel Bars or CFRP Bars

Wang,

Yang,

Song

et al. 2024

Materials

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To explore and compare the failure modes, deformation behaviors, and load-bearing capacities of single-edge notched (SEN) beams strengthened with carbon fiber-reinforced polymer (CFRP) and steel bars, static and dynamic three-point bending tests on both types of concrete beams have been carried out in this study. During the static tests, the electro-hydraulic servo machine served as a loading device to apply pressure to CFRP beams and reinforced concrete (RC) beams. During the impact experiments, different impact velocities were imparted by adjusting the drop hammer’s height. Thus, information regarding crack propagation, energy absorption, and deformation was obtained. The results from the static tests showed that the RC beams predominantly experienced shear failure. In contrast, the CFRP beams primarily exhibited bending–shear failure, attributed to the relatively weaker bond strength between the bars and the concrete. Impact tests were conducted at three different velocities in this study. As the impact velocity increased, both types of concrete beams transitioned from bending failure to bending–shear failure. At the lowest velocity, the difference in energy absorption between beams reinforced with different materials was insignificant during the bending process. However, at the highest velocity, CFRP beams absorbed less energy than RC beams. The study of structures’ impact failure modes and their mechanical characteristics offers valuable references for the anti-collision design and protection of structures.

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Section: Introductionmentioning

confidence: 99%

Comparison of Fracture Behavior in Single-Edge Notched Beams Reinforced with Steel Bars or CFRP Bars

Wang,

Yang,

Song

et al. 2024

Materials

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Evaluation of Coconut Fiber in Corroded Reinforced Self-Healing Concrete Using NDT Methods

Zaki,

Aprilia,

Rosyidi

et al. 2024

NDT

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The incorporation of natural fibers into concrete has recently emerged as a popular approach in the field of construction materials due to its sustainability and environmental friendliness. In comparison to artificial fibers, natural fibers are more cost-effective and widely available globally. Among the various natural fibers, coconut fiber (CF) stands out for its unique set of advantages. This study aims to investigate the mechanical properties and durability of coconut-fiber-reinforced self-healing concrete (CFR-SHC) in the context of corrosion resistance. Additionally, Bacillus subtilis bacteria (10% by mass) was incorporated into the CFR-SHC. The impact of ±50 mm long CF with varying contents of 0.25%, 0.5%, and 0.75% by mass was examined. Specimens were subjected to corrosion acceleration for 48, 96, and 168 h. Non-destructive testing (NDT) methods of Electrical Resistivity (ER) and Impact Echo (IE) were conducted to test the corrosion resistance. The experimental results demonstrate that CFR-SHC increased the compressive strength by 6% and the flexural strength by 40%. CFR-SHC also exhibits excellent resistance to corrosion, characterized by low inrush current, high ER value, and high IE frequency. The most favorable overall outcomes were observed for the CFR-SHC sample containing 0.5% of the cement mass.

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Corrosion effects on the flexural performance of prestressed reinforced concrete beams

Cited by 2 publications

References 45 publications

Comparison of Fracture Behavior in Single-Edge Notched Beams Reinforced with Steel Bars or CFRP Bars

Comparison of Fracture Behavior in Single-Edge Notched Beams Reinforced with Steel Bars or CFRP Bars

Evaluation of Coconut Fiber in Corroded Reinforced Self-Healing Concrete Using NDT Methods

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