Abstract：To explore the influence mechanism on the strain rate effect of concrete compressive strength for rubber particles, a split Hopkinson pressure bar (SHPB) with a diameter of 100 mm were used. The dynamic compressive performance and strain rate effect of rubber concrete (with the rubber content of 10%, 20%, and 30%) were obtained. Besides, the reasons for the difference in strain rate effect between rubber concrete and ordinary concrete were analyzed. The experimental results showed that the dynamic increased factor (DIF) of rubber concrete increased with the increase of strain rate. Furthermore, the failure mode analysis showed that the particle size of all post-tested specimens gradually decreases with the increase of strain rate. At similar strain rates, ordinary concrete has more cracks than rubber concrete. Rubber particles can slow down damage accumulation and increase deformation hysteresis effect when compared to ordinary concrete, resulting in the increase of strain rate sensitivity for concrete compressive strength.
2023, Vol. 36 
