Research on reinforcement and repair techniques for the infrastructure weakened by environmental factors was extensive, with the focus on the assessment of their mechanical behavior. A promising method in civil engineering is the use of connection reinforcements that offer a wide range of applications. When the structure is repaired or strengthened, concrete has been exposed to ambient measures for years, so that the external layer is likely to be coal -addicted. This study examines the influence of initial carbon dioxide on the adhesive bond between concrete and carbon fiber reinforced polymer systems (CFRP). In this experimental study, cement mortar samples of accelerated carbonization conditions were exposed to a CO2 Concentration of 3 %. Mechanical tests were carried out on both control and carbonated samples in order to evaluate changes in the adhesive properties. Extract tests showed that the methods for carbon and surface preparation significantly improve the binding strength. Remarkably, the binding strength showed a significant increase of 30 %within 60 days of accelerated carbon dioxide. The carbon dioxide improves the pressure resistance of concrete by producing calcium carbonates. This study shows that in the infrastructure rehabilitation projects, especially in areas with high CO₂ exposure, natural carbon dioxide can improve binding performance and general durability and sustainability before using CFRP.
Evaluation of the effects of carbonic acid on CFRP-Mortar bond: a combined mechanical and microstructural analysis
