Publication Details
Abstract
A viable platform for reinforcing structural elements is high-performance powder concrete (UHPC); however, the coherence behaviour (Bond) at the CFRP–UHPC interface is primarily determined by the effectiveness of carbon fibre laminate (CFRP) reinforcement. In addition to providing a quantitative description of coherence behaviour, this work intends to clarify the mechanics of adhesive separation and failure and to crystallise executive advice for optimising reliance.Surface preparation: The impact of four popular methods—chemical etching, sandblasting, grooving, and grinding—on surface roughness, epoxy stick wettability, and effective fixing length is examined in this study. Roughness is assessed using its morphological markers and the pull-off test, which is a first analysis of the interface. Based on the results, the "controlled coarse" textures improve stress transfer through the adhesive, postpone early separation, and provide higher mechanical interference while excessive spang or uncontrolled tumping may lead to local vulner abilities.The pilot program included single-lap shear examinations to derive Bond–Slip curves and their parameters, and quad-point curvature examinations for UHPC thresholds reinforced with CFRP, while monitoring patterns of failure and transitions between adhesive failure and cohesive failure within UHPC or adhesive. The calibration showed that the approved Bond–Slip model, combined with the roughness indicators and fixing length, represents a laboratory response with sufficient accuracy for initial design purposes.
The research ends with workable advice for surface preparation, choice of installation length, and adjustment of site gluing procedures helping for adaptable and long-lasting reinforcement ideas Elements made of carbon fiber laminate (CFRP) UHPC.