Evaluation of surface roughness and bond-slip behavior of new textured epoxy-coated reinforcing bars

Zhang, Zige; Jung, Dae Soo; Andrawes, Bassem

doi:10.1016/j.conbuildmat.2020.120762

Cited by 11 publications

(13 citation statements)

References 15 publications

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“…Also, between the UC and EC specimens, the EC rebars experienced, in general, lower slip resistance, probably because of their smooth surface. In the first three mixture types studied by Zhang et al, all the TEC bars shared the initial part of the curves and, except for TEC1, consistently showed a better performance with respect to the UC and EC counterparts (8). In the case of the TEC1 and TEC7 specimens, their slip resistance degraded considerably at later stages, displaying even an inferior bond-slip behavior than UC rebars.…”

Section: Initial Slip Resistancementioning

confidence: 82%

“…Despite their conclusions, it was still unclear how the surface profile of TEC bars affected their interfacial bond-slip behavior with concrete. Therefore, Zhang et al furthered the previous research and studied the characteristics of TEC1 and five additional types of TEC rebar that were developed with different texture patterns ( 8 ). Two companies were in charge of the manufacturing process: the first company was responsible for TEC1 to TEC3 bars, while the second company was responsible for TEC4 to TEC6 bars.…”

mentioning

confidence: 99%

“…Two companies were in charge of the manufacturing process: the first company was responsible for TEC1 to TEC3 bars, while the second company was responsible for TEC4 to TEC6 bars. Later, according to the results of a series of small-scale experimental and numerical tests carried out by Zhang et al, a new type of TEC rebar, labeled TEC7, was created ( 8 ). The TEC7 reinforcement was manufactured by the first company in consultation with the second company, and it was based on the promising high slip resistance exhibited by TEC2 and TEC6 bars and the high yielding capacity of TEC3 bars discovered previously by Zhang et al ( 8 ).…”

mentioning

confidence: 99%

“…Later, according to the results of a series of small-scale experimental and numerical tests carried out by Zhang et al, a new type of TEC rebar, labeled TEC7, was created ( 8 ). The TEC7 reinforcement was manufactured by the first company in consultation with the second company, and it was based on the promising high slip resistance exhibited by TEC2 and TEC6 bars and the high yielding capacity of TEC3 bars discovered previously by Zhang et al ( 8 ). This study, then, represents the continuation of the investigations listed above on the field of textured reinforcement, and it aims to compare and improve the understanding of the characteristics of the seven types of TEC rebar developed to date.…”

mentioning

confidence: 99%

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Textured Epoxy-Coated Rebars: Physical, Structural, and Empirical Characterization

Pérez-Claros

Andrawes

2023

Transportation Research Record: Journal of the Transportation R

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Although the traditional epoxy coating represents an effective corrosion protection system, it has the disadvantage of making bridge decks more susceptible to cracking. This phenomenon occurs because its smooth surface reduces the bond with the concrete and, therefore, increases the radial components of the force-transferring mechanism. To try to mitigate these problems, the Illinois Department of Transportation developed the textured epoxy-coated (TEC) reinforcement, which possesses a roughened surface and, in recent years, has been the subject of study at the University of Illinois Urbana-Champaign, in the U.S. Particularly, this experimental program explores, complements, and compares the physical and bond-slip characteristics of the TEC rebars developed hitherto. From the physical characterization, different parameters are measured on the textured surfaces to obtain a numerical comparison of each roughness type. Also, determining the adhesion strength and thickness of the textured coating reveals that it provides similar corrosion protection to the traditional approach while keeping its integrity on the steel substrate. The bond-slip characterization, in turn, was done using pull-out tests and, by combining these results with the microstructure examination of TEC bars, it is found that the absence of texture voids is related to the degradation of the slip resistance. Furthermore, through a finite element model, the development length of the TEC reinforcement is estimated and compared with the values calculated according to current standards. Finally, given the complexity of obtaining the surface parameters of the coating, an empirical, weight-based approach is developed for the TEC bars as a rapid method for assessing their roughness.

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Section: Initial Slip Resistancementioning

confidence: 82%

mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Textured Epoxy-Coated Rebars: Physical, Structural, and Empirical Characterization

Pérez-Claros

Andrawes

2023

Transportation Research Record: Journal of the Transportation R

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“…Through the experiment and technical improvement, the protection performance of epoxy coating on steel bars has been continuously improved (Nguyen and Martin, 2004;Singh and Ghosh, 2005;Selvaraj et al, 2009;Caldona et al, 2021). By changing the material and structure of the coating, the integrality performance of the reinforced concrete structure which is composed of epoxy-coated steel bars, and concrete has been verified and improved (Kim and Andrawes, 2019;Zhang et al, 2020;Shang et al, 2021). Epoxy coating can provide protection for steel bars even in the case of poor concrete quality (Darwin and Scantlebury, 2002).…”

Section: Introductionmentioning

confidence: 99%

Corrosion Experimental Research on Local Damage of Epoxy-Coated Steel Bars in Concrete Under Marine Environment

et al. 2022

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Epoxy coating has been proven to protect steel bars from corrosion. However, the damage of epoxy coating is inevitable, and this may lead to more serious corrosion of steel bar. In order to study the corrosion resistance of steel bars with damaged epoxy coating, two groups of coating-damaged bar and one group of coating-intact rebar were designed, and six specimens were made. The influence of electrolyte concentration on the corrosion rate of steel bars was studied by setting different concentrations. After 30 days of accelerated corrosion, electrochemical data were recorded by the electrochemical workstation. The experimental result shows that the steel bars with coating damage have obvious polarization curve characteristics of corrosion, and corrosion resistance decreases obviously. According to the corrosion current and potential, the larger the damaged area of the coating, the faster will be the corrosion rate. According to the polarization curve data, the polarization resistance is modified, and the result is closer to the real polarization resistance value. The calculated corrosion rate shows that the corrosion rate of reinforcement is affected by both electrolyte concentration and coating damage area, and electrolyte concentration has a greater influence on the corrosion rate.

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Visual Analysis of the Protective Effect of Asphalt Coating on MOCC against Steel Corrosion and Rust Crack Formation

et al. 2022

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Evaluation of surface roughness and bond-slip behavior of new textured epoxy-coated reinforcing bars

Cited by 11 publications

References 15 publications

Textured Epoxy-Coated Rebars: Physical, Structural, and Empirical Characterization

Textured Epoxy-Coated Rebars: Physical, Structural, and Empirical Characterization

Corrosion Experimental Research on Local Damage of Epoxy-Coated Steel Bars in Concrete Under Marine Environment

Visual Analysis of the Protective Effect of Asphalt Coating on MOCC against Steel Corrosion and Rust Crack Formation

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