In this research, the mechanical behavior of structural concrete made with materials in Iran has been experimentally investigated after experiencing high temperatures. For this purpose, six different mix designs were selected in accordance with Iranian Concrete Standard (ABA). Six different target temperatures (25, 100, 250, 500, 700, and 900°C) were also selected for the purpose of fire experience. Compressive and tensile strength tests were carried out on all of the samples and their behavior was evaluated after experiencing different target temperatures. The results show a strong drop in compressive and tensile strength at temperatures above 700°C. It can be noted that at 900°C all specimens lost their strength. Finally, thanks to the large number of experiments, different relationships are presented based on the results to determine the mechanical properties of different mix designs at different temperature levels.

中文翻译：

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评估混凝土试样火灾后力学性能的实验研究

在这项研究中，伊朗的材料制成的结构混凝土的机械性能在经历高温后已经进行了实验研究。为此，根据伊朗混凝土标准（ABA）选择了六种不同的混合料设计。为了防火体验，还选择了六个不同的目标温度（25、100、250、500、700和900°C）。对所有样品进行抗压强度和拉伸强度测试，并在经历不同的目标温度后评估其行为。结果表明，在高于700°C的温度下，抗压强度和抗张强度大大降低。可以注意到，在900°C下，所有试样都失去了强度。最后，由于进行了大量的实验，