Experimental Study on High-temperature Water Cooling Damage of Basalt Fiber Reinforced Recycled Concrete
Using Basalt Fiber(BF)volume admixture and the highest duration temperature as the parameters of vari-ation,a total of 90 standard cubic specimen blocks of Basalt Fiber Reclaimed Concrete(BFRC)were designed to conduct high temperature sprinkler cooling and compressive strength-acoustic emission(AE)tests in order to investigate the effect of BF volume admixture and the highest temperature elapsed on the mechanical properties of BFRC.The results show that the test piece's integrity is severely broken,its surface breaks off,and all of the aggregate is revealed when the temperature reaches 1 000℃;The specimen's residual compressive strength gradually drops when the temperature is in the range of 200℃and 400℃,and the effect of resisting high temperatures is obvious;The first compression-tightening and crack-emergence stage,the crack extension and pooling stage,and the post-peak damage stage are the three phases of the high-temperature water-jet-cooled compressive damage process of the BFRC;There are clear differences in the cumu-lative counts of acoustic emission ringing at each stage;The formula for determining the compressive strength of BFRC following fire sprinkler installation may be used as a guide for assessing the impact of varying BF volume content and the maximum duration temperature on BFRC's compressive strength.
high temperature water spray coolingbasalt fiberrecycled concreteresidual compressive strengthringer accumulation count
万方数据
维普
