Flexural performance of reinforced concrete (RC) beam strengthened by UHPC layer

Mirdan, Dhafer; Saleh, Abdul Ridah

doi:10.1016/j.cscm.2022.e01655

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…Hussain and Amla developed a composite member of UHPC and normalstrength concrete and the experimental outcomes revealed that composite beams could resist a shear force 1.6-2.0 times more than the regular RC member [17]. Midran and Saleh [25] examined the flexural response of RC beams retrofitted with the UHPC layer. Seven RC beams were fabricated with the variables of rebar type, construction joint's location, and continuity of the UHPC layer.…”

Section: Introductionmentioning

confidence: 99%

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

Biswas,

Saito,

Misawa

et al. 2023

Preprint

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Corrosion of reinforcement bars in reinforced concrete (RC) structures is considered a major concern. This study examines the flexural response of severely corroded RC beams retrofitted with ultra-high performance fiber reinforced concrete (UHPC) layer. UHPC layers were attached to the concrete substrate in four different configurations to investigate whether they could strengthen severely corroded RC beams. To represent carbonation-induced uniform corrosion, artificial corrosion was adopted in this study by replacing the deformed bars with plain bars and reducing the cross-sectional area. The plain steel bars represented about 38% of rebar corrosion. Obtained results revealed that UHPC layers can remarkably enhance the structural performance when it comes to serviceability and ultimate limit state. The test results also revealed that RC beams retrofitted with the UHPC layer might be unable to improve the displacement capacity of the corroded RC beam owing to bond deterioration between the concrete and embedded rebars and reduced cross-sectional area. Finally, a simplified numerical model was developed in this study and validated with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

Biswas,

Saito,

Misawa

et al. 2023

Preprint

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show abstract

“…The combined action of chloride and sulfate can cause the dissolution of calcium limestone crystals in concrete, resulting in changes in the pore structure of the concrete. [20][21][22][23] In addition, chloride salts and sulfates can also cause an increase in the size of pores and porosity in concrete, which can also lead to a decrease in the mechanical properties of concrete. 24 Sulfate solution can also replace some of the chloride ion products Friedel salts in concrete to form needle shaped ettringite crystals, and ettringite often accumulates together in clusters, radiating from the center to the surrounding areas.…”

Section: Introductionmentioning

confidence: 99%

“…The pore structure in concrete has a significant impact on its mechanical properties. The combined action of chloride and sulfate can cause the dissolution of calcium limestone crystals in concrete, resulting in changes in the pore structure of the concrete 20‐23 . In addition, chloride salts and sulfates can also cause an increase in the size of pores and porosity in concrete, which can also lead to a decrease in the mechanical properties of concrete 24 .…”

Section: Introductionmentioning

confidence: 99%

Research on improving the durability performance of damaged concrete based on ultra high performance concrete repair

Wang,

Liu,

Zhang

et al. 2023

Engineering Reports

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This article uses ultra‐high performance concrete (UHPC) to repair damaged concrete and analyzes the durability performance of the repaired concrete. Among them, three erosion solutions with a mass concentration of 2.8% NaCl + 0.29% Na2SO4, 5% NaCl, and 5% NaCl + 10% Na2SO4 were designed to soak the concrete specimens for 1 to 3 months. Taking the SWC test group as an example, when the concrete test block undergoes 30 dry wet cycles and the erosion depth is 20 mm, the difference in chloride ion concentration under different diffusion dimensions is not significant. After 90 dry wet cycles, at a depth of 20 mm, the chloride ion concentration inside the concrete in the three‐dimensional diffusion state reached 3 times that of one‐dimensional diffusion, and the chloride ion concentration in the two‐dimensional diffusion state also reached 2 times that of one‐dimensional diffusion. At a depth of 30 mm, a small amount of chloride ion content was also found in the two‐dimensional diffusion and three‐dimensional diffusion.

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Structural behavior of severely corroded RC beams retrofitted with UHPC layer: an experimental study

Biswas,

Saito,

Misawa

et al. 2023

Innov. Infrastruct. Solut.

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Flexural performance of reinforced concrete (RC) beam strengthened by UHPC layer

Cited by 8 publications

References 31 publications

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

Structural behavior of severely corroded RC beams retrofitted with UHPC layer - experimental study and numerical analysis

Research on improving the durability performance of damaged concrete based on ultra high performance concrete repair

Structural behavior of severely corroded RC beams retrofitted with UHPC layer: an experimental study

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