Advances in bonding agents for retrofitting concrete structures with fibre reinforced polymer materials: A review

Alzubi, Mohammad A.; Fan, Mizi; Anguilano, Lorna

doi:10.1016/j.conbuildmat.2022.127115

Cited by 35 publications

(12 citation statements)

References 144 publications

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“…While the use of epoxy agents can enhance bonding strength, researchers have not yet reached a consensus on their overall benefits. It has been found that epoxy adhesives may have certain drawbacks, such as poor creep performance and inadequate fire resistance of epoxy resins (Al-Zu’bi et al, 2022; Al-Jelawy, 2013; Al-Jelawy and Mackie, 2021). These factors need to be taken into consideration when evaluating the suitability of epoxy agents for specific applications.…”

Section: Interfacial Bonding Mechanisms Under Different Interfacial T...mentioning

confidence: 99%

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

Huang,

Hou,

et al. 2024

Advances in Structural Engineering

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This study aims to investigate the influence of different surface treatments, including smooth interface, rough interface, anchor bolt connection, and epoxy bonding agent, on the shear resistance of Engineered Cementitious Composites (ECC)-concrete interface through bi-surface shear testing. The experimental results show that the interfacial shear strength between ECC and concrete is significantly enhanced by the implementation of the three interface treatment methods, as opposed to the smooth interface. Among these methods, the anchor bolt connection exhibits the greatest improvement in interfacial bonding performance. Notably, cohesive failure is observed in the anchor bolt connection method, while the other three methods result in adhesive failure, with only the anchor bolt connection method displaying ductile failure behavior. Following a comprehensive review of relevant studies and the outcomes of this experiment, three distinct interface bonding mechanisms were identified and the forces contributing to the bond were analyzed. Results indicated that the interfacial bond strength is notably influenced by the surface roughness. These research findings substantiate the viability of utilizing the anchor bolt connection method, particularly in applications where ductility requirements in the repair layer are essential for structural integrity.

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Section: Interfacial Bonding Mechanisms Under Different Interfacial T...mentioning

confidence: 99%

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

Huang,

Hou,

et al. 2024

Advances in Structural Engineering

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“…The type of filler was found to be of high importance in the strengthening process because it acts as a transition layer to transfer loads/stresses between concrete and FRP materials and distribute them through both concrete/ adhesive and adhesive/FRP interfaces. 90,91 Two types of epoxy adhesives were considered by Rizzo and de Lorenzis 33 with direct tensile strengths of 18.6 and 22.8 MPa and corresponding tensile elastic moduli of 4.15 and 12.87 GPa. It was noticed that the beam strengthened using epoxy having lower tensile strength and elastic modulus failed at 19% higher load and its FRP contribution to the shear capacity was more than twice that of the beam strengthened using the one with higher mechanical properties.…”

Section: Groove-filling Materialsmentioning

confidence: 99%

A review on retrofitting concrete members with near‐surface mounted‐fiber reinforced polymer composites

Al‐Zu'bi,

Fan,

Bertolesi

et al. 2024

Structural Concrete

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In an era flooded with a multitude of studies investigating the performance of concrete structures retrofitted using fiber‐reinforced polymer (FRP) materials, this review addresses the critical need for a comprehensive overview of the retrofitting of concrete members using near‐surface mounted (NSM)‐FRP composites, aiming to save time and effort while providing engineers and research community with valuable resources relevant to the field. This review focuses on the key factors influencing both the flexural and shear retrofitting processes of reinforced concrete (RC) beams, such as the percentage, type, size and geometry of NSM‐FRP reinforcement, as well as groove design, groove‐filling materials and beam depth. Moreover, the paper explores the failure modes associated with each retrofitting type, for example, debonding failures, shear/flexural failure and rupture of steel or NSM‐FRP reinforcement, to name a few. The review also delves into the bond behavior of NSM‐FRP‐bonded joints, examining factors, such as the bonded length, surface texture of NSM‐FRP reinforcement and type of bonding agent, which would affect the bond behavior and strength of the joints. The failure mechanisms associated with the bonded joints, such as interfacial bond failure, FRP rupture and splitting of the adhesive cover, are also highlighted. Finally, this compilation aims to guide engineers and researchers by offering a critical and comprehensive database for optimal designs, further development and suggesting future research directions.

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“…In cases where RC buildings are subjected to accidental fires, they become vulnerable to cracking and a reduction in the load-bearing capacity of key components like beams, columns, and slabs. Among these structural elements, damage to RC slabs due to high temperatures tends to be more severe compared to other structural elements; fiber-reinforced polymer (FRP) is a promising material as an alternative to traditional techniques for repair and strengthening [9][10][11][12][13]. The utilization of FRP materials has seen a substantial increase, driven by their remarkable attributes, including high strength, light weight, impressive strength, resistance to corrosion, improved service life, durability, and straightforward installation [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Repairing of One-Way Solid Slab Exposed to Thermal Shock Using CFRP: Experimental and Analytical Study

Shhabat,

Ashteyat,

Abdel-Jaber

2024

Fibers

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This research was conducted to investigate, experimentally, theoretically, and numerically, the use of CFRP materials for repairing a reinforced concrete one-way solid slab exposed to thermal shock. Nine slabs, measuring 1800 mm in length, 500 mm in width, and 100 mm in depth, were cast. Seven of these slabs underwent thermal shock at a temperature of 600 °C, rapidly cooled by immersion in water for 15 min. Three primary parameters were examined: the type of CFRP (rope, strip, and sheet), spacing (100 and 200 mm), and the number of sheet layers (one and two). The experimental results revealed a significant decrease of approximately 45.4% in the compressive strength of the concrete after exposure to thermal shock. The thermally shocked RC slab showed a reduction in ultimate capacity by 15.4% and 38.5% in stiffness compared to the control slab. The results underscored the efficacy of CFRP materials, with all repair configurations exhibiting a substantial increase in maximum load capacity and stiffness. Capacity enhancement ranged from 23.7% to 53.4%, while stiffness improvement ranged from 27.6% to 57.1%. Notably, all repair configurations effectively minimized the maximum deflection. This reduction in deflection ranged from 5.2% to 26% compared to the control slab. Numerical results demonstrated strong concurrence with experimental results for both capacity and deflection. The enhancement in capacity ranged from 0.7% to 10.4%, while deflection decreased within a range from 0.95% to 14.16% compared to experimental results.

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Advances in bonding agents for retrofitting concrete structures with fibre reinforced polymer materials: A review

Cited by 35 publications

References 144 publications

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

Enhancing the interfacial bond performance of engineered cementitious composites and concrete

A review on retrofitting concrete members with near‐surface mounted‐fiber reinforced polymer composites

Repairing of One-Way Solid Slab Exposed to Thermal Shock Using CFRP: Experimental and Analytical Study

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