The influence of concrete surface preparation on the effectiveness of reinforcement using carbon fibre-reinforced polymer in high-performance, self-compacting, fibre-reinforced concrete

Abstract

When understanding the influence of concrete surface preparation on the effectiveness of CFRP reinforcement, the load capacity of high-performance, self-compacting, fibre-reinforced concrete (HPSCFRC) is crucial for it efficiency. In this studies, few factors that have an influence on the stress–strain characteristic of concrete confined by CFRP laminates were examined. The method of surface preparation and the number of CFRP layers were considered as crucial parameters that have a significant impact on the characteristics of the load-bearing capacity of reinforced elements. Three different concrete surfaces were examined: grinded, sanded and unprepared. The morphology of each of the concrete surfaces was clearly, and the Abbott-Firestone profile material share curve was then extensively analyzed. During this research, 40 cylindrical concrete specimens were wrapped with one, two and three layers of CFRP, and then subjected to a uniaxial compressive test. The obtained results showed that the morphology of the concrete surface has a real impact on the load-bearing capacity of HPSCFRCreinforced with CFRP. Furthermore, the grinded concrete surface was characterized by the best cooperation with the composite reinforcement.