articleJournal of Composites ScienceFeb 28, 2026GOLD OA

Bond–Slip Performance of GFRP Rebars in Concrete Under Alkaline and Thermal Conditioning

Don Carlo Gnocchi Foundation · University Niccolò Cusano · +3 more institutions

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Abstract

This study investigates the bond–slip behavior of glass fiber-reinforced polymer (GFRP) bars embedded in concrete and exposed to alkaline environments at different temperatures. Although GFRP reinforcement is increasingly adopted for its corrosion resistance, the long-term bond performance of the bar–concrete interface in high-pH conditions is still not fully understood. To help close this gap, a comprehensive database of 84 pull-out tests from the literature was assembled, focusing on three key parameters: bar surface configuration, exposure duration, and conditioning temperature. The comparative analysis highlights the dominant role of surface treatment in bond degradation and reveals substantial variability…

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