Experimental study on bond behavior between epoxy-coated reinforcement (ECR) and seawater sea-sand concrete (SSC) under FRP-steel confinement

Wang, Jizhong; Xiao, Fangduo; Yang, Junlong

doi:10.1016/j.conbuildmat.2023.131426

Cited by 6 publications

(2 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The substitution of SFCB for steel addresses two key problems, steel corrosion and the lack of ductility in FRP bars. A large number of previous studies have demonstrated the favorable bonding properties between FRP bars and concrete, resulting in a synergistic effect that enhances the integrity and safety of FRP-reinforced concrete [27][28][29]. However, it is imperative to investigate whether SFCB exhibits similar bonding properties with concrete and creates a beneficial synergy.…”

Section: Introductionmentioning

confidence: 99%

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Li,

Jian,

Song

et al. 2024

Buildings

View full text Add to dashboard Cite

The combined application of steel–FRP composite bars (SFCBs) and seawater sea-sand concrete (SSSC) in marine engineering not only solves the problem of resource scarcity and reduces the construction cost but also avoids the problems of chloride corrosion of steel reinforcement in seawater sea-sand concrete and the lack of ductility of FRP bars. At the same time, the addition of glass fiber (GF) and expansion agent (EA) in appropriate amounts improves the crack resistance and seepage resistance of concrete. However, the durability of SFCB with GF- and EA-reinforced SSSC in freezing–thawing environment remains unclear, which limits its potential application in cryogenic marine engineering. This study investigates the bonding properties between SFCB and GF-EA-SSSC interfaces using eccentric pullout experiments under different thicknesses of concrete protective cover and a number of freezing–thawing cycles. The results showed that the compressive strength and dynamic elastic modulus of SSSC decrease, while the mass loss increases with an increasing number of freezing–thawing cycles. Additionally, the bond strength and stiffness between SFCB and SSSC decrease, leading to an increase in relative slip. However, the rate of bond strength and stiffness loss decreases with an increase in the thickness of the concrete protective cover. Furthermore, formulas for bond strength, relative slip, and bond stiffness are established to quantify the effects of the thickness of the concrete protective cover and the number of freezing–thawing cycles. The experimental values obtained verify the accuracy of these formulas, with a relative error of less than 5%. Moreover, a bond stress–slip constitutive model is developed for SFCB and GF-EA-SSSC, and the fitting results closely resemble the experimental values, demonstrating a high level of model fit.

show abstract

Section: Introductionmentioning

confidence: 99%

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Li,

Jian,

Song

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Wang et al [5] found that during the pull-out test, the concrete cover of the reinforced concrete sample using seawater and sea sand split more severely, and the confinement effectiveness of FRP-reinforced specimens is higher than that of normal specimens.…”

Section: Introductionmentioning

confidence: 99%

Influence of Corrosion on the Bond–Slip Behaviour between Corroded Bars and Concrete

Zhao,

Ying,

et al. 2023

Materials

View full text Add to dashboard Cite

Pull-out tests were conducted to investigate the effects of corrosion of both the longitudinal bars and stirrups on the bond slip behaviour of reinforced concrete specimens. The main experimental variables include concrete strength (26.7 MPa, 37.7 MPa and 45.2 MPa) and expected corrosion loss (0%, 4%, 8% and 12%), with a total of 63 specimens fabricated. The results show that the relative bonding strength of specimens under different concrete strengths gradually decreases with increasing corrosion loss, but the higher the concrete strength is, the faster its degradation rate. The influence of stirrup corrosion on the peak slip can be ignored, but it will further aggravate the degradation of the bonding strength of the specimens. This reduction in bonding strength is linearly related to the stirrup corrosion loss. Based on the experimental results of this work and the achievements of other scholars, a modified relative bonding strength degradation model and a bond–slipbond–slip constitutive model of corroded reinforced concrete are presented by accounting for the influence coefficient of concrete strength. The results show that the constitutive model is in good agreement with the relevant experimental results.

show abstract

Development of admixtures on seawater sea sand concrete: A critical review on Concrete hardening, chloride ion penetration and steel corrosion

Chen,

Jia,

Zhu

2024

Construction and Building Materials

View full text Add to dashboard Cite

Experimental study on bond behavior between epoxy-coated reinforcement (ECR) and seawater sea-sand concrete (SSC) under FRP-steel confinement

Cited by 6 publications

References 40 publications

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Influence of Corrosion on the Bond–Slip Behaviour between Corroded Bars and Concrete

Development of admixtures on seawater sea sand concrete: A critical review on Concrete hardening, chloride ion penetration and steel corrosion

Contact Info

Product

Resources

About