Evaluation of Bond Strength on Fiber Reinforced Concrete (FRC) with GFRP Rebars under Marine Environmental Conditions - An Experimental Investigation

International Journal of Civil Engineering

© 2025 by SSRG - IJCE Journal

Volume 12 Issue 1

Year of Publication : 2025

Authors : M.Z. Mohamed Firdows, S. Packialakshmi

10.14445/23488352/IJCE-V12I1P103

How to Cite?

M.Z. Mohamed Firdows, S. Packialakshmi, "Evaluation of Bond Strength on Fiber Reinforced Concrete (FRC) with GFRP Rebars under Marine Environmental Conditions - An Experimental Investigation," SSRG International Journal of Civil Engineering, vol. 12,  no. 1, pp. 16-29, 2025. Crossref, https://doi.org/10.14445/23488352/IJCE-V12I1P103

Abstract:

Researchers examined how Glass Fiber Reinforced Polymer (GFRP) bars bond with standard and Fiber-Reinforced Concrete (FRC) when exposed to marine conditions at 45°C.Thirty-six specimens with 12 mm diameter GFRP rebars featuring twisted and sand-coated surfaces were embedded in 100 mm concrete cubes and subjected to direct tension pullout tests per ASTM D 7913. Results show that surface treatment significantly influences bond-slip relationships and durability. Sand-coated GFRP rebars exhibited superior performance, achieving bond stresses of 11.77 MPa in plain concrete and 13.66 MPa in FRC, compared to 9.89 MPa and 12.39 MPa for twisted rebars, respectively. Durability assessment revealed lower bond strength reductions for sand-coated rebars (7% in plain concrete, 13.5% in FRC) compared to twisted rebars. These findings provide crucial insights for designing corrosion-resistant concrete structures using GFRP reinforcement.

Keywords:

GFRP, Fiber Reinforced Concrete (FRC), Sand-coated, Twisted, Bond strength, Slip.

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