Abstract This paper develops a novel rubberized ultra-lightweight high ductility cement composite (RULCC) with added rubber powder and low content PE fiber (0.7%), and investigates the dynamic compressive response and failure mechanism of the RULCC both experimentally and analytically. The test program examines the dynamic compressive stress-strain relationship of the RULCC through Split Hopkinson Pressure Bar (SHPB) impact tests. The results show that the rubber powder aggregates have significant effect on the compressive strength, stress-strain relations and failure mechanism of the RULCC. A volume replacement of fine aggregates with 5%, 10% and 20% rubber power results in a reduction in static compressive strength by 29.5%, 47.7% and 60.3%, respectively. The RULCC with a low fiber content of 0.7% in volume exhibits a 3% direct tensile strain, and a 4–5% tensile strain can still be achieved after 10% rubber powder is added to the RULCC, showing a high ductility of the material. The SHPB impact test shows that the compressive strength increases with strain rate. An empirical model, taking into account of the replacement ratio of the rubber powder aggregates in the RULCC, is developed in this paper to evaluate the Dynamic Increasing Factor (DIF). The experimental and analytical studies are essential to better understand the fundamental dynamic behavior of the RULCC for its further applications in engineering applications, such as protective structures, etc.

中文翻译：

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掺橡胶粉的新型超轻水泥复合材料的动态压缩行为

摘要 本文开发了一种添加橡胶粉和低含量PE纤维（0.7%）的新型橡胶化超轻质高延性水泥复合材料（RULCC），并通过实验和分析研究了RULCC的动态压缩响应和破坏机制。该测试程序通过拆分霍普金森压力棒 (SHPB) 冲击测试来检查 RULCC 的动态压缩应力-应变关系。结果表明，胶粉团聚体对RULCC的抗压强度、应力应变关系和破坏机理有显着影响。用 5%、10% 和 20% 的橡胶粉体积替代细骨料导致静压强度分别降低 29.5%、47.7% 和 60.3%。体积为 0.7% 的低纤维含量的 RULCC 表现出 3% 的直接拉伸应变，在 RULCC 中加入 10% 的橡胶粉后，仍可达到 4-5% 的拉伸应变，显示出材料的高延展性。SHPB 冲击试验表明，抗压强度随着应变速率的增加而增加。本文开发了一个经验模型，考虑到 RULCC 中橡胶粉末聚集体的替代率，以评估动态增加因子 (DIF)。实验和分析研究对于更好地了解 RULCC 的基本动态行为对于其在工程应用中的进一步应用至关重要，例如保护结构等。本文开发了一个经验模型，考虑到 RULCC 中橡胶粉骨料的替代率，以评估动态增加因子 (DIF)。实验和分析研究对于更好地了解 RULCC 的基本动态行为对于其在工程应用中的进一步应用至关重要，例如保护结构等。本文开发了一个经验模型，考虑到 RULCC 中橡胶粉末聚集体的替代率，以评估动态增加因子 (DIF)。实验和分析研究对于更好地了解 RULCC 的基本动态行为对于其在工程应用中的进一步应用至关重要，例如保护结构等。