Dynamic Compressive Mechanical Behavior of Basalt Fiber Reinforced Geopolymer Concrete under High Temperature
In order to study the dynamic compressive mechanical behavior of basalt fiber reinforced geopolymer concrete(BFRGC)after high temperature,BFRGC specimens with fiber volume content of 0％,0.1％,0.2％and 0.3％were prepared,and dynamic impact tests of BFRGC specimens at 20,200,400,600 and 800℃were carried out.The results show that the static compressive strength,dynamic compressive strength and specific energy absorption of BFRGC specimens have obvious temperature enhancement effect and high temperature damage effect,and the peak strain shows a significant temperature plasticization effect.The temperature threshold of static compressive strength and dynamic compressive strength of BFRGC specimens is 400℃.With the increase of temperature,the static compressive strength,dynamic compressive strength and specific energy absorption of BFRGC specimens increase first and then decrease,and the peak strain increases continuously.The static compressive strength and dynamic mechanical properties of geopolymer concrete at room temperature and high temperature can be improved by adding appropriate content of basalt fiber,and the optimal content of basalt fiber is 0.1％.
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