高温后纤维再生混凝土的力学性能试验研究

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中图分类号：TQ178；TU528

文献标志码：A 文章编号：1001-5922（2025）06-0056-04

Experimental study on mechanical properties of fiber recycled concrete after high temperature

WANG Xiaoai，ZHENG Jun，WANG Weiwei （Guangzhou University of Science and Technology，Guangzhou ，China）

Abstract：The fiber recycled concrete was treated at room temperature and high temperature（175～775 ℃）. The ap⁃ pearance，mass loss rate，compressive strength and splitting tensile strength of fiber recycled concrete after room temperature and high temperature treatment were compared and analyzed. The results show that from room tempera⁃ ture to 775‰ high temperature，fiber recycled concrete will change from black gray to grayish white. As the temper⁃ ature gradually increases，the quality loss rate of fiber-reinforced recycled concrete shows a gradually increasing trend. When the temperature is 775‰ ，the mass loss rate of fiber recycled concrete reaches 8.67% . Except that the average compressive strength of fiber recycled concrete after high temperature treatment at 175‰ and 375 C will be higher than that of fiber recycled concrete specimens at room temperature，the average compressive strength of fi⁃ ber recycled concrete specimens after high temperature treatment will decrease. The average splitting tensile strength of fiber recycled concrete after high temperature treatment will be lower than that of fiber recycled concrete specimens at room temperature，and the increase of temperature will reduce the average splitting tensile strength. Key words：high temperature；fiber；recycled concrete；mechanical property

纤维再生混凝土是以纤维和再生混凝土为原料制作的可用于公路、机场、桥梁、水工、建筑等领域的混凝土[1]，由于具有良好的抗渗、抗冻、抗冲磨、抗冲击等性能[2]而在现代土木建筑工程中应用较为广泛。（剩余5683字）