Optimization of Fiber-Reinforced Polymer (FRP) Wrapping for Corrosion-Damaged Reinforced Concrete Beams in Plateau State, Nigeria

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@article{1710346,
      author = {Jingnap Princewill Selnan, Akpan Boniface Ekarika, Tolulope Dorcas Mobolade-Solomon},
      title = {Optimization of Fiber-Reinforced Polymer (FRP) Wrapping for Corrosion-Damaged Reinforced Concrete Beams in Plateau State, Nigeria},
      journal = {Iconic Research And Engineering Journals},
      year = {2025},
      volume = {9},
      number = {2},
      pages = {1090-1099},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1710346.pdf},
      abstract = {Reinforced-concrete infrastructure in Plateau State, Nigeria, is increasingly distressed by chloride- and carbonation-induced corrosion exacerbated by the region?s cool?wet monsoon climate and widespread use of de-icing salts in the Jos-Bukuru metropolis.  This study investigated the optimum configuration of externally-bonded carbon FRP (CFRP) and glass FRP (GFRP) wraps for restoring flexural capacity of 20 naturally-corroded beams salvaged from a collapsed shopping complex in Rayfield, Jos South.  A two-stage experimental programme?Phase I: rapid electrochemical chloride extraction (ECE) followed by Phase II: wet lay-up FRP wrapping?was adopted.  Variables included FRP type (CFRP vs. GFRP), number of plies (1, 2, 3), fiber orientation (0?/90? vs. ?45?), and surface preparation level (wire-brushed vs. grit-blasted).  Ultimate load, deflection, and failure mode were measured under four-point bending to BS EN 12390-5 (2019).  Results revealed that two plies of 0?/90? CFRP applied after grit-blasting and ECE restored 96 % of the original flexural capacity, whereas equivalent GFRP achieved 88 %.  Conversely, ?45? orientation maximised ductility (?u/?y = 3.8) but only regained 79 % strength.  A response-surface model (R? = 0.94) identified ?number of plies? (? = 0.61) and ?surface roughness? (? = 0.23) as the most influential parameters.  Cost?benefit analysis indicated CFRP wrapping at 60 % of replacement cost for a 25-year extended service life.  The study provides a field-ready protocol for rehabilitating corrosion-damaged RC members in Plateau State and similar tropical highland regions.},
      keywords = {FRP wrapping; corrosion; reinforced concrete; plate bonding.},
      month = {August},
  }