Bond between Sand-Coated GFRP Bars and Normal-Strength, Self-Compacting, and Fiber-Reinforced Concrete under Seawater and Alkaline Solution

Shakiba, Milad; Bazli, Milad; Karamloo, Mohammad; Doostmohamadi, Alireza

doi:10.1061/jccof2.cceng-3987

Cited by 15 publications

(2 citation statements)

References 63 publications

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“…From the above results, a moderate amount of nano-TiC, BF, and FA could improve the flexural strength of concrete. The main reason was that the appropriate amount of BF formed a mesh structure inside the concrete matrix, which shared the external load with the matrix through interfacial bonding 47 . The FA improved the fluidity of concrete leading to a more uniform dispersion of fibers in concrete 48 .…”

Section: Resultsmentioning

confidence: 99%

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Yang,

Yu,

et al. 2024

Sci Rep

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Ultra-high-rise buildings require high concrete bearing capacity. Ordinary concrete often fails to meet the project requirements. Admixture of admixtures in concrete is a means of solution. Currently, studies on the incorporation of basalt fiber (BF) and fly ash (FA) in concrete are relatively mature. However, research on incorporating nano-Titanium Carbide (nano-TiC) in concrete is still relatively scarce, which has a lot of room for development. To further improve the mechanical properties of concrete, BF, and FA synergized with nano-TiC were incorporated into concrete to produce TBF concrete in this study. And Response Surface Methodology (RSM) was used to optimize the mechanical properties of concrete. The collapse and compressive deformation damage characteristics of concrete were analyzed. The microstructure of the cement matrix was analyzed by the SEM (Scanning Electron Microscope). An optimization model of the TBF concrete craving function was developed. Optimized ratios with compressive, split tensile, and flexural strengths as response objectives were obtained, and the accuracy of the optimized ratios was investigated using the same experimental conditions. The results of the study showed that FA increased the collapse of concrete, while nano-TiC and BF decreased the collapse of concrete. Under uniaxial compression, nano-TiC, FA, and BF together incorporated into concrete can improve its compressive damage state. Moderate amounts of nano-TiC, BF, and FA could improve the mechanical properties of concrete. Their optimal mixing ratio admixtures were 0.88%, 0.24%, and 5.49%, respectively. And the measured values under the same conditions were compared with the predicted values. The maximum difference in compressive strength was 6.09%. The maximum difference in split tensile strength was 7.14%. The maximum difference in flexural strength was 8.45%. This indicated that the accuracy of the RSM optimization model was good. A moderate amount of nano-TiC, FA, and BF could improve the densification of concrete.

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Section: Resultsmentioning

confidence: 99%

Research on mechanical properties of concrete by nano-TiC-BF-fly ash

Yang,

Yu,

et al. 2024

Sci Rep

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“…Despite the fact that FRP composites provide excellent protection against corrosion, they have been found to be vulnerable to some aggressive environments, particularly an alkaline environment, such as concrete [15][16][17][18]. The vulnerability of composite structures to harsh environments can become evident quickly, often within a short time of exposure.…”

Section: Introductionmentioning

confidence: 99%

Tensile strength retention of glass fibre-reinforced stirrups subjected to aggressive solutions: effect of environmental condition, stirrup shape and stirrup diameter

Hajmoosa,

Mahmoudi,

Ebrahimzadeh

et al. 2024

Mater Struct

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The aim of this study was to examine how the tensile strength of glass fibre reinforced polymer stirrups is affected by different types of solutions, including alkaline, seawater, tap water, and acidic solutions. The study involved the production and testing of 260 stirrups in two different shapes (L and U) with diameters of 6 and 8 mm. The stirrups were immersed in different solutions for a period of 9 months at different temperatures (25, 40, and 60 °C). The findings indicated that the alkaline solution was the most aggressive environment, resulting in a maximum reduction of 92% in tensile strength after 9 months at 60 °C. Seawater and acidic solutions were the second and third most aggressive environments, causing maximum tensile strength reductions of 34 and 22% respectively, after 9 months at 60 °C. On the other hand, tap water was found to be the least aggressive environment, causing a maximum tensile strength reduction of 20% after 9 months at 60 °C. Furthermore, the study observed that the L-shaped stirrups exhibited slightly superior performance compared to the U-shaped stirrups. However, the diameter of the stirrups was found to be a negligible factor.

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