## 1 Introduction
In the study conducted by [PERSON] et al., the impact of high temperatures on concrete with added glass fibers was examined. The results indicated that the flexural strength of the concrete decreased with the addition of short glass fibers in high amounts, while the flexural strength increased with the addition of long glass fibers in high amounts. Furthermore, the compressive strength of the concrete decreased when long glass fibers were utilized at high temperatures [13]. In their study, [PERSON] et al. found that steel fiber-reinforced concrete demonstrated superior mechanical behavior at high temperatures compared to concrete without fiber reinforcement. It is worth noting that the addition of steel fiber did not have any significant effect on the compressive strength of the concrete [14]. A study was conducted by [PERSON] et al. on the impact of high temperatures on concrete with added polypropylene fiber. The study found that the addition of polypropylene fiber had a slightly positive effect on reducing the negative impact of high temperatures on concrete, including losses in tensile, flexural, and compressive strength [15]. [PERSON] et al. compared the performance of cement-stabilized macadam using static and vibratory compression methods in their study. In the vibratory compression method, less crack formation and samples that are more resistant to temperature cycles were obtained compared to static compression [16]. It is worth noting that in high-temperature studies of fiber-reinforced concrete, the addition of fibers is typically used to enhance flexural and tensile strength. In this study, ceramic fiber was added to the dry mix by dissolving it in activators and water, which allowed for the homogeneous distribution of the ceramic fiber throughout the concrete's internal structure. The ceramic fiber was evenly distributed throughout the internal structure of the concrete, acting as a protective cover and mitigating the effects of high temperatures. The objective of this study is to mitigate the decrease in compressive strength of concrete under high-temperature conditions while simultaneously preserving its flexural and tensile strength. Geopolymeric concrete requires different binders than PCC. These binders are alkaline fluids and pozzolanic materials. Pozzolanic materials consist of materials such as metakaolin, fly ash, and slag, which are rich in silica (Si) and aluminum (Al) [17; 18]. The polymerization of aluminosilicates of pozzolanic materials forms geopolymer concrete. These aluminosilicates significantly affect geopolymer concrete's physical and mechanical properties [19; 20]. The pozzolanic materials used in this study are slag, silica fume, and fly ash. Silica fume increases the strength of cementitious and geopolymeric matrices by reducing the void ratio [21]. [PERSON] et al. found that using silica fume in their studies reduced the gap rates of geopolymeric matrices and thus increased the bending strength with pressure strength. However, excessive silica fume negatively affected pressure resistance and bending strength [5]. Slag occurs as a by-product of iron and steel production [22]. In their study, [PERSON], [PERSON], and [PERSON] investigated the effect of blast furnace slag addition on the mechanical properties of fly ash-based geopolymers. As a result of this study, it was determined that the addition of blast furnace slag significantly increased the compressive strength due to the formation of calcium silicate hydrate (C-S-H) gel, which helps create a denser structure [23]. Another study revealed that adding blast furnace slag