Effectiveness of Concrete Retrofitted with FRP Wrapping Subjected to Higher Temperature

Abstract

This work aims to provide additional insight into the behavior of fiber-reinforced polymer (FRP) laminates at high temperatures. The compressive properties of concrete coated in fiber-reinforced polymer (FRP) under elevated heat levels. The study addresses the important issue of assessing the performance of structural elements, specifically concrete columns, in the event of a fire. Recently, there has been increased interest in fiber-reinforced polymer (FRP) composite materials as a possible concrete structural rehabilitation solution. The purpose of this study was to ascertain, using both destructive and non-destructive methods, how fire damage affected concrete specimens retrofitted with Aramid FRP, Carbon FRP, and Glass FRP laminates. After being exposed to 250, 500, and 750°C for one, two, and three hours, the cube specimens were retrofitted with FRP laminates. In order to maximize the performance of concrete structures under harsh circumstances, the research highlights the significance of taking into account both the mechanical and fire-resistant qualities of retrofitting materials. The concrete’s compressive strength increased for one hour at 250ºC, after which it fell, according to the results. Nonetheless, a decrease in compressive strength was noted at higher temperature and fire duration ranges. The compressive strength improved as compared to standard concrete, regardless of the type of fiber-reinforced polymer wraps utilized.

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