RESIDUAL COMPRESSIVE STRENGTH AND ULTRASONIC TESTING AFTER MIXING FIBER RPC AT ELEVATED TEMPERATURE

Abstract

Abstract: In order to study high temperature damage of reactive powder concrete (RPC), in the present experiment, the volume of polypropylene fiber and basalt fiber was controlled to be 0.2% and 0.1%, respectively. Then, the residual compressive strength, mass loss rate, ultrasonic velocity and its relationship with the fire temperature of steel fiber reactive powder concrete with different volume of 0,1%,1.5 % and 2% after high temperature were analyzed. The results show that the residual compressive strength and ultrasonic velocity of RPC specimens decrease continuously with the increase of fire temperature. The incorporation of steel fiber can increase the residual compressive strength and ultrasonic velocity value of the mixed fiber RPC specimen after high temperature. The compressive strength and ultrasonic velocity of the blended fiber RPC specimens increase with the increase of the steel fiber volume.

Key words: reactive powder concrete, mixed fiber, elevated temperature, ultrasonic testing, mechanical properties

CLC Number:

TB332

HE Yi-xuan, DU Hong-xiu. RESIDUAL COMPRESSIVE STRENGTH AND ULTRASONIC TESTING AFTER MIXING FIBER RPC AT ELEVATED TEMPERATURE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(8): 78-81.

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