Study on bond strength of geopolymer and control concrete between fiber‐reinforced polymer and steel bars

2020 ◽  
Author(s):  
Nagajothi Subramanian ◽  
Elavenil Solaiyan
Keyword(s):  
Bond Strength ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Steel Bars ◽  
And Control

Alkali and temperature long-term effect on the bond strength of fiber reinforced polymer-to-concrete interface

2017 ◽  
Vol 52 (15) ◽  
pp. 2103-2114 ◽  
Author(s):  
Mahdie Mohammadi ◽  
Majid Barghian ◽  
Davood Mostofinejad ◽  
Adel Rafieyan
Keyword(s):  
Bond Strength ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Particle Image Velocimetry Technique ◽  
Reinforced Polymer ◽  
Long Term Effect ◽  
Image Velocimetry ◽  
Externally Bonded ◽  
Bond Characteristics

The effects of such environmental conditions as alkali media at temperatures of 23℃, 40℃, and 60℃ were investigated on the fiber reinforced polymer-to-concrete bond strength. For this purpose, 42 specimens were strengthened via the externally bonded reinforcement and the externally bonded reinforcement on grooves techniques. The specimens were later subjected to the single-shear test after the specified durations of exposure to an alkaline medium. The particle image velocimetry technique was used to investigate such bond characteristics of the strengthened specimens as load-slip behavior, strain profiles, and strain fields along the fiber reinforced polymer-to-concrete bond. Experimental results showed that the specimens strengthened via the externally bonded reinforcement on grooves method exhibited ultimate bond loads by up to 50% higher than those strengthened via the externally bonded reinforcement method.

scholarly journals Experimental Study on Bond Performance of Carbon- and Glass-Fiber Reinforced Polymer (CFRP/GFRP) Bars and Steel Strands to Concrete

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1268
Author(s):  
Jun Zhao ◽  
Xin Luo ◽  
Zike Wang ◽  
Shuaikai Feng ◽  
Xinglong Gong ◽  
...  
Keyword(s):  
Bond Strength ◽  
Bond Length ◽  
Retention Rate ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Bond Performance ◽  
Gfrp Bars ◽  
Reinforced Polymer ◽  
Gfrp Bar ◽  
Strength Retention

FRP bars and steel strands are widely used in civil engineering. In this study, three different types of high-strength reinforcement materials, carbon fiber reinforced polymer (CFRP) bar, glass fiber reinforced polymer (GFRP) bar, and steel strand, were investigated for their interfacial bond performance with concrete. A total of 90 sets of specimens were conducted to analyze the effects of various parameters such as the diameter of reinforcement, bond length, the grade of concrete and stirrup on the bond strength and residual bond strength. The results show that CFRP bars possess a higher bond strength retention rate than steel bars in the residual section. In addition, with the increase in bond length and diameter of the CFRP bar, the residual bond strength decreases, and the bond strength retention rate decreases. Furthermore, the bond strength retention rate of GFRP bars was found to be higher than that of CFRP bars. With the increase in grade of concrete, the bond strength and residual bond strength between GFRP bars and concrete increases, but the bond strength retention rate decreases. With an increase in bond length and diameter of the GFRP bar, the bond strength starts to decrease. Further, stirrup can also increase the bond strength and reduce the slip at the free end of GFRP bars. Moreover, the bond strength retention rate of the steel strand was found to be lower than CFRP and GFRP bar.

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