Flexural strengthening of reinforced concrete beams using fabric reinforced Alkali-Activated Slag matrix

Old Reinforced Concrete (RC) buildings are facing different degrees of structural deterioration and require proper strengthening to enhance their performance as well extend life span. Fabric reinforced Alkali-Activated Slag (AAS) matrix is proposed strengthen RC beams in this study. Seven with without were prepared tested under four-point bending. Test results indicate that use AAS replacement for conventional cement-based can change the failure mode strengthened from end-debonding layer slippage combined rupture fabric. The AAS-based strategy able loading capacity flexural stiffness beams, reduce strain tensile reinforcements. Except specimens failed premature debonding, increasing fabric amount scheme improves beams. In an optimal case, yielding ultimate loads enhanced by 22.2% 26.4%, respectively. Moreover, analytical model was developed predict characteristic It shows could overestimate probably due reduced synergistic effect bundles system. Based on that, two efficiency factors 0.35 0.25, taking account area effective fabric, obtained recommended estimate matrix-strengthened