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<p>The present study analyses the influence of ground granulated blast furnace slag (GGBS) on the rate and mechanisms of corrosion in reinforced concrete (RC) beams. A total of 12 RC beams of 150 × 150 × 1500 mm admixed with GGBS (0%, 20%, 40%, and 60%) were cast. Beams with 0%, 20%, 40%, and 60% GGBS content were cast for 0%, 10%, and 15% reinforcement corrosion. The 0% corrosion reinforcement with 0%, 20%, 40%, and 60% GGBS content served as control specimens. The Half-cell potential technique assessed the corrosion resistance of these reinforcements embedded in RC beams. The rebars were extracted from the beams and weighed to determine the actual level of corrosion. The flexural strength (FS), load deflection (P–Δ), moment–curvature (M–θ), ductility (μ), and cracking behavior were analyzed for all sets of RC beams. It was found that 40% GGBS as a cement replacement enhances a maximum 9.32% increase in ultimate FS compared to the control beam and provides superior corrosion protection. Nonetheless, a substantial decrease in maximum FS was noted as corrosion levels rose from 10 to 15%. Further, all the experimental results were validated using finite element analysis (FEA). The experimental results showed good agreement with the FEA predictions, with a maximum deviation of 12% observed in P–Δ and FS outcomes.</p>

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Flexural Behavior of Corroded Reinforced Concrete Beams with GGBS: A Comparative Study

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Sandeep Sathe,
  • Syed Wasim Nawaz Razvi,
  • Arunabh Pandey,
  • Shahbaz Dandin,
  • Mohd Zain Kangda

摘要

The present study analyses the influence of ground granulated blast furnace slag (GGBS) on the rate and mechanisms of corrosion in reinforced concrete (RC) beams. A total of 12 RC beams of 150 × 150 × 1500 mm admixed with GGBS (0%, 20%, 40%, and 60%) were cast. Beams with 0%, 20%, 40%, and 60% GGBS content were cast for 0%, 10%, and 15% reinforcement corrosion. The 0% corrosion reinforcement with 0%, 20%, 40%, and 60% GGBS content served as control specimens. The Half-cell potential technique assessed the corrosion resistance of these reinforcements embedded in RC beams. The rebars were extracted from the beams and weighed to determine the actual level of corrosion. The flexural strength (FS), load deflection (P–Δ), moment–curvature (M–θ), ductility (μ), and cracking behavior were analyzed for all sets of RC beams. It was found that 40% GGBS as a cement replacement enhances a maximum 9.32% increase in ultimate FS compared to the control beam and provides superior corrosion protection. Nonetheless, a substantial decrease in maximum FS was noted as corrosion levels rose from 10 to 15%. Further, all the experimental results were validated using finite element analysis (FEA). The experimental results showed good agreement with the FEA predictions, with a maximum deviation of 12% observed in P–Δ and FS outcomes.