Flexural Behavior of RC Beams Strengthened with GFRP Laminate and Retrofitting with Novelty of Adhesive Material

Two unique approaches were proposed to strengthen the bond between glass fiber reinforcement polymer (GFRP) and RC concrete surfaces. The two bonding materials are epoxy (EP) geopolymer (GPP) with different ratios of short fibers (SGF). experimental program includes seven reinforced (RC) beams that have same cross-section (150 mm × 200 mm) 1500 in length. first beam is control (B0-Control). next three B1-0-GPP, B2-0.6-GPP, B3-1.2-GPP GPP SGF 0%, 0.6%, 1.2%, respectively. last B4-0-EP, B5-0.6-EP, B6-1.2-EP EP results show failure loads B2-0.60-GPP, greater than B0-Control by approximately 20.80%, 25.60%, 31.40%, respectively, whereas 16.90%, 26.90%, 26.10%, respectively; it also noted debonding occurs. In addition adhesive material, has a great effect on increasing beam’s load capacity due enhanced interfacial shear strength. Additionally, finite-element ABAQUS performed verify results.