## 1 Introduction
On the other hand, the preparation and installation of these anchors greatly increase the difficulty of implementation and the demand for craftsmanship [28; 29]. To increase interfacial shear resistance, several indirect anchorage techniques have been created [30; 31]. By expanding the adhesive area between the FRP and the concrete, the near-surface mounted (NSM) approach increased the indirect anchoring of FRP composites [32; 33]. The American Code Institute (ACI) [34] has suggested the concrete grooving method (GM) as an easy version of the NSM due to its important development in concrete surface roughness [35]. The interfacial bond strength with the adhesive region between FRP and concrete can be greatly enhanced by grooving the concrete before applying epoxy resin [36]. The preparation of concrete surface grooves, on the other hand, would significantly increase construction work [37]. As a result, a variety of substances and techniques have been researched to identify viable alternatives that might be utilized as a partial or full replacement for Portland cement to create ecologically friendly concrete [38]. Geopolymer is typically synthesized by activating aluminosilicate source material with an alkaline solution (such as NaOH or KOH) [39]. Metakaolin (MK) with a lower calcination temperature or industrial waste products such as fly ash (FA), slag, and rice husk ash are frequently employed as an aluminosilicate source material. Because of this, producing geopolymer uses less energy and generates less carbon dioxide. Geopolymer is regarded as a possible substitute for cement due to its exceptional qualities including low shrinkage, fast concretion, high early compressive strength, and superior fire resistance [40]. The bond property of geopolymer has recently piqued the interest of researchers [41; 42; 43]. Composite materials produce a combination property of two or more materials that neither fiber nor matrix can achieve when acting alone [44]. Short-fiber-reinforced polymer (SFRP) composites are particularly attractive due to their simplicity in manufacture, low cost, and outstanding mechanical properties [45]. High fiber content is generally required to achieve a high-performance SFRP composite. As a result, the effect of fiber content on the mechanical properties of SFRP composites is of particular interest and significance [46]. Glass-fiber-reinforced polymeric composites were the most used materials in the production of composite materials [47]. Finally, adequate bonding between the FRP laminates and the RC concrete surfaces is critical for successful strengthening; failure to do so would result in undesirable premature failure before the ultimate load. The main objectives of this study are (1) to suggest two adhesive materials to improve the bond between the GFRP laminates and the concrete surface and (2) to study the impact of the adhesive materials on the tested beams' structural behavior. The adhesive materials used are Sikadur\({}^{\otimes}-\)330 epoxy (EP) and geopolymer paste (GPP) with different short glass fibers (SGF) ratios. In addition, an analytical examination using the non-linear finite element computer software ABAQUS [48] has been performed to validate the experimental consequences of the tested beams.