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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2022, Vol. 41 ›› Issue (2): 657-666.

• Road Materials and Others • Previous Articles     Next Articles

Effect of Basalt Fiber on Performance ofSteel Slag-Asphalt Mixture

CHEN Gaixia1, YIN Yanping2, LUO Yaofei3   

  1. 1. School of Architecture Engineering, Zhengzhou University of Industrial Technology, Zhengzhou 451100, China;
    2. School of Materials Science and Engineering, Chang’an University, Xi’an 710000, China;
    3. School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450046, China
  • Received:2021-11-01 Revised:2022-01-02 Online:2022-02-15 Published:2022-03-01

Abstract: To improve the anti-cracking property of steel slag-asphalt mixture (SAM), and minimize the effect of steel slag (SS) expansion characteristics on the durability of asphalt mixture, the comparative research on the effects and reinforcement mechanism of different contents of basalt fiber (BF) on the high and low temperature performance, water stability and fatigue property of SAM was implemented via rutting test, SPT dynamic modulus test, low temperature bending test, freeze-thaw splitting test, bending fatigue test, SEM test, etc. Results show that the addition of BF improves the high temperature anti-deformability, and increases the low temperature flexibility of SAM with different SS content to a certain extent. With the increase of freeze-thaw cycles, the decrease of water stability of BF-SAM is significantly lower than that of ordinary SAM. The reinforcement and crack resistance of BF improve the fatigue life of SAM. After comprehensive consideration of various road performance, the recommended BF content of BF-SAM is 4% (mass fraction) and the recommended SS content range is 45% to 55% (mass fraction).

Key words: steel slag-asphalt mixture, basalt fiber, composition design, reinforcement mechanism, road performance, high-and-low temperature performance

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