Seismic Upgradation of RC Beams Strengthened with Externally Bonded Spent Catalyst Based Ferrocement Laminates

Globally, since there are more systems of civil infrastructure, also degraded buildings and structures. If upgrading or strengthening is a practical option, complete replacement likely to be an escalating financial burden may waste natural resources. It necessary repair strengthen number reinforced concrete structures in order boost their load-bearing capabilities improve ductility under seismic stress. Additionally, due changes service circumstances, structure might need modified reduce deflections manage cracking. Strengthening preferable limiting usage, capping applied loads, regularly inspecting the rather than removing existing part building new one. This study aims examine flexural, shear, combined effect flexural shear behavior (RC) beams strengthened with externally bonded spent catalyst-based ferrocement laminates compare them control (unstrengthened) two-point loading conditions. involves researching various catalyst doses, such as 3, 6, 9, 12%, effort determine best amounts that will structural performance laminates. Twelve measuring 500(L) × 125(B) 20 mm (thickness) 3% volume fraction meshes each were cast tested lab preliminary investigation. For repeatability, three per case employed. Eight numbers under-reinforced RC 75(L) 100(B) 150(D) for main study; six optimized flexible epoxy at tension zone, combination zone. Two specimens. The then evaluated using Universal Testing Machine (UTM) 1000 kN capacity As result, strength, yield load, ultimate stiffness, ductility, related failure modes all beams' performances examined. According analysis made catalyst, dosage 9% provides good strength comparison other doses. In beam, beam's initial cracks appeared earlier. beam has increase load-carrying 18% flexure, 16% 30% impact flexure shear. deflection was decreased by close 40% 10 15 20% effects same load level. relation beams, improved up 25% Similar this, retrofitted stiffer approximately 48% Theoretical formulation section derived it gives agreement beams. retrofitting system effectively increased No showed signs premature brittle failure. test findings, can said perform better every way Doi: 10.28991/HIJ-2023-04-01-013 Full Text: PDF