Long-term durability of basalt- and glass-fibre reinforced polymer (BFRP/GFRP) bars in seawater and sea sand concrete environment

Wang, Zike; Zhao, Xiao‐Ling; Xian, Guijun; Wu, Gang; Raman, R.K. Singh; Al-Saadi, Saad; Haque, Asadul

doi:10.1016/j.conbuildmat.2017.02.038

Cited by 428 publications

(215 citation statements)

References 43 publications

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“…It is unreasonable to consider the tensile degradation of the CFRP sheets under a complex environment as having occurred based solely on the time‐shift factor. To predict the durability of the CFRP sheets, a new approximation method was used based on a tensile strength retention model defined by :

Y = 100 exp (|, - \frac{true}{t})

where Y represents the tensile strength retention (%), t is the exposure time, and τ is the fitted parameter. The prediction results of the CFRP sheets under both environments are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Xie

Guo

et al. 2017

Polymer Composites

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Fiber reinforced polymer (FRP) composites are used in harsh environments, resulting in degradation of their mechanical properties. Such degradation is critical in terms of the reliable design and application of FRP composites. In this study, a set of CFRP flat coupons and epoxy resin matrix flat coupons were prepared and subjected to alternating conditions of 10 h immersion in a 40°C NaCl solution with a concentration of 3.5%, and 14 h drying at 25°C and 60% relative humidity (RH). They were divided into five series, subjected to 0, 60, 120, 240, and 360 wet‐dry cycles, respectively. For a comparison with the acceleration simulation tests, the same numbers of specimens were exposed to a natural hygrothermal environment for 0, 6, 12, 18, and 30 months, respectively. After removal from the environment at the designated time, a series of tension tests were carried out. Based on the experimental results, the relationship regarding the tensile strength degradation of the CFRP sheets between the natural hygrothermal environment and the cyclic wet‐dry environment was determined. It was found that the tensile modulus of the CFRP sheets increased by 1.4%, and the tensile strength and ultimate strain decreased by 8.1% and 8.0% after 360 wet‐dry cycles, respectively. After a 30‐month natural exposure period, the tensile strength, tensile modulus, and ultimate strain of the CFRP sheets decreased by 9.9%, 3.4%, and 7.2%, respectively. The tensile property of the epoxy resin matrix appeared to be more sensitive to these two types of exposure environments than that of the CFRP sheets, and the tensile strength decreased by 59.4% at the end of 30‐month exposure. POLYM. COMPOS., 40:553–567, 2019. © 2017 Society of Plastics Engineers

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Y = 100 exp (|, - \frac{true}{t})

Section: Resultsmentioning

confidence: 99%

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Xie

Guo

et al. 2017

Polymer Composites

View full text Add to dashboard Cite

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“…The solution used in the model was also chosen according to the work by Wang et al 25 In general, SWSSC solution is a solution with high alkalinity. According to the issued literature, the pH of N-SWSSC was measured to be 13.4.…”

Section: N-swssc Solutionmentioning

confidence: 99%

“…Degradation rate-based model A two-dimensional (2D) FE model was realized in the commercial software COMSOL Multiphysics to investigate the depth of degradation of a BFRP bar exposed to a seawater sea sand pore solution subjected to various temperatures. In the experiment conducted by Wang et al, 25 the middle part of the BFRP bar specimens has been inserted inside the PVC (polyvinyl chloride) pipe that is used as a chamber for exposure to simulate SWSSC solution. The ends of the PVC pipe were sealed with epoxy adhesive to ensure no leakage.…”

Section: N-swssc Solutionmentioning

confidence: 99%

Degradation of basalt fiber–reinforced polymer bars in seawater and sea sand concrete environment

Sharma

Zhang

Zhao

2020

Advances in Mechanical Engineering

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Although numerous experimental and analytical investigations on the environmental effects on basalt fiber–reinforced polymer bars were carried out, degradation of the basalt fiber–reinforced polymer bar in seawater and sea sand concrete environment has been insufficiently analyzed. This work presents two distinct numerical approaches, degradation rate–based approach and diffusion-based approach, to investigate the durability of basalt fiber–reinforced polymer bars in seawater and sea sand concrete solution subjected to various temperatures (32°C, 40°C, 48°C, and 55°C). The degradation of the material was quantified using a simplified two-dimensional model of a homogenized basalt fiber–reinforced polymer bar in COMSOL Multiphysics software. Fickian diffusion provides basis for modeling diffusion-based approach. The findings from both the approaches suggested that the basalt fiber–reinforced polymer bar becomes more susceptible to degradation as the exposure temperature increases and results in greater geometrical deformities. The comparisons of experimental data, analytical solutions, and numerical results showcase that the present numerical models can predict the degradation of a basalt fiber–reinforced polymer bar in a seawater and sea sand concrete environment.

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“…In order to overcome the corrosion issue, research has been carried out in recent decades to incorporate corrosion-resistant materials, such as fiber-reinforced polymer (FRP), into concrete structures [4,5]. Replacing traditional steel bars with FRP bars can effectively inhibit corrosion and improve the durability of concrete structures [6,7]. However, due to the low elastic modulus and brittle behavior of some FRP materials, problems exist in FRP-reinforced concrete (FRPRC) structures (Figure 1(b)), such as the high deformability, the lack of ductility, and large crack widths [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Bond Performance of Carbon Fiber-Reinforced Polymer Bar with Dual Functions of Reinforcement and Cathodic Protection for Reinforced Concrete Structures

Zhou

Sui

Xing

et al. 2020

Advances in Polymer Technology

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The dual function of a carbon fiber-reinforced polymer (CFRP) bar working as reinforcement and impressed current cathodic protection (ICCP) anode for reinforced concrete structures has been proposed and researched in this paper. The ICCP tests with different current densities and polarization durations were first conducted for the concrete with high chloride content. After the ICCP application, pull out tests were then performed to investigate the bond behaviors of CFRP bars. Experimental results have shown the effectiveness of the new-type ICCP system with the CFRP bar as the anode on corrosion protection. The ICCP system provided electrons to the steel bar continuously and brought the potential of the steel bar down to the immunity region. Under the anodic polarization with a large current density of 100 mA/m2, the CFRP bar-concrete interface presented acidification and the chemical adhesion on the interface was decreased significantly. However, for cases in the experiment, the ICCP application had an insignificant influence on the ultimate bond strength.

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Long-term durability of basalt- and glass-fibre reinforced polymer (BFRP/GFRP) bars in seawater and sea sand concrete environment

Cited by 428 publications

References 43 publications

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Degradation of basalt fiber–reinforced polymer bars in seawater and sea sand concrete environment

Bond Performance of Carbon Fiber-Reinforced Polymer Bar with Dual Functions of Reinforcement and Cathodic Protection for Reinforced Concrete Structures

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