The effect of concrete cover and concrete strength on concrete with FRP bars exposed to high temperature

Keywords: FRP Bar, heat, accessory fixtures, concrete As everything changed in the renewed world, construction technology has moved to a higher level than before. In this context, construction material, which is one of the most important branches of civil engineering, has taken place in technological developments with more confidence than ever. Rather, the points where the traditional materials are incomplete led the researchers to develop new generation materials. FRP (Fiber Reinforced Polymer) composite materials are also important in this respect. GFRP (Glass Fiber Reinforced Polymer) composite materials which are the most commonly used among the reinforced polymers and help the engineers to reach the optimum point are lightness, high strength, high fatigue performance and so on. It plays an important role in completing the missing points of traditional materials with its properties. Although new materials are produced with new technology, there are a few points where these materials are also missing. The most important one is the performance against the fire effect. GFRP composites show specific performance against temperature. When they reach Tg (Polymer Matrices), their polymeric properties deteriorate and do not give the desired performance. Therefore, the temperature, in particular the Tg temperature, is of great importance for these materials. In this study, we observed the performance of our GFRP equipment against fire effect by using concrete and spacers and class differences based on Tg temperature. Our GFRP-equipped samples with various spacers and concrete grades are exposed to high temperatures in the furnace for the effect of fire. The measurement thermocouple is made with the help of a thermometer. When the samples reached the Tg temperature, the temperature of the reinforcement, the ambient temperature and the concrete temperature were determined during the elapsed time. The timer was used during the measurement. The data obtained were compared to the graphical data. This gives us an idea about which concrete class to use when using GFRP reinforced concrete. Another point of view is the time that the sample reached to the Tg temperature, that is, the sample with which the rust or the concrete class has the Tg temperature. This gives us critical time. According to this, the best performance is the 6cm sample with the most rust. In the concrete class,