Carbon-fiber Reinforced Concrete with Short Aramid-fiber Interfacial Toughening

Abstract

The interfacial fracture and delamination mechanism of a concrete beam reinforced by carbon-fiber reinforced plastic was investigated in this study. Short aramid fiber mats were applied between the carbon-fiber cloth and concrete to improve the interfacial toughness. Four-point bending tests (FPB) were carried out to determine measure the critical strain energy release rate. By testing specimen with different amount of carbon-fiber cloth and aramid-fiber mat, the thickness influence was also investigated. SEM image of the splitting fibers explains the enhancement of the critical energy release rate the enhancement of the critical energy release rate was studied by EM image of the splitting fibers. The critical energy release rate of the interfacial delamination was also evaluated through the Finite element analysis (FEA) simulation and was used to verify the experimental result.