This study experimentally examines the effect of rubber aggregate size on the static and dynamic behavior of rubberized concrete. Rubberized concrete specimens were prepared with different maximum rubber aggregate sizes ranging from 1 to 3 mm to 3 to 5 mm while the rubber content was kept constant at 15% by volume. The dynamic compressive behavior of rubberized concrete was investigated by using split Hopkinson pressure bar (SHPB) tests. The experimental results have shown that rubberized concrete with smaller rubber aggregates showed higher static compressive strength as compared to that with larger rubber aggregates. Meanwhile, the rubber aggregate size did not considerably affect the density of rubberized concrete. The use of smaller rubber aggregate size mitigated the slump reduction of rubberized concrete. Rubberized concrete exhibited obvious sensitivity to strain rate and those with larger rubber aggregates showed higher strain rate sensitivity. The progressive damage of rubberized concrete showed more ductile behavior with bulging failure, which was different from the typical concrete under compression. In general, the use of smaller rubber aggregate size was beneficial to the static compressive strength but less effective to the dynamic compressive strength of rubberized concrete as compared to those with larger rubber aggregates.

中文翻译：

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橡胶骨料尺寸对橡胶混凝土静、动态抗压性能的影响

本研究通过实验检验了橡胶骨料尺寸对橡胶混凝土静态和动态性能的影响。橡胶混凝土试样的制备具有不同的最大橡胶骨料尺寸，从 1 到 3 毫米到 3 到 5 毫米不等，同时橡胶含量保持在 15% 的体积百分比不变。通过使用分裂霍普金森压力棒（SHPB）试验研究了橡胶混凝土的动态压缩行为。实验结果表明，与较大的橡胶骨料相比，具有较小橡胶骨料的橡胶混凝土具有更高的静压强度。同时，橡胶骨料尺寸对橡胶混凝土的密度没有显着影响。使用较小的橡胶骨料尺寸减轻了橡胶混凝土的坍落度降低。橡胶混凝土对应变率表现出明显的敏感性，橡胶骨料较大的混凝土应变率敏感性更高。橡胶化混凝土的渐进性破坏表现出更多的延性行为，并伴有膨胀破坏，这与典型的受压混凝土不同。一般来说，与使用较大橡胶骨料的橡胶骨料相比，使用较小尺寸的橡胶骨料有利于提高橡胶混凝土的静态抗压强度，但对橡胶混凝土的动态抗压强度效果较差。