A recently developed type of metaconcrete consists of engineered resonant steel cells exhibiting superior wave attenuation and energy dissipation capacity. Nonetheless, it has always been a challenging task to prepare affordable and environmentally friendly metaconcrete. In this study, we employed recycled rubber powder (RP) to coat coarse aggregate (crushed stone) as a resonant aggregate (RA). The RA was then incorporated into the metaconcrete using conventional mechanical mixing techniques. The results demonstrated a significant 175% increase in the damping ratio of the metaconcrete, primarily attributable to the superior energy dissipation of the RA. Furthermore, the RP coating eliminated the interface transition zone (ITZ) in the concrete, thereby enhancing its impermeability and freeze-thaw resistance. This research presents an innovative approach to developing environmentally friendly cementitious materials with high damping properties.

中文翻译：

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通过设计由再生橡胶粉末涂覆粗骨料制成的新型高阻尼超混凝土

最近开发的一种超混凝土由工程共振钢单元组成，具有卓越的波浪衰减和能量耗散能力。尽管如此，制备负担得起且环保的超混凝土始终是一项具有挑战性的任务。在这项研究中，我们采用再生橡胶粉（RP）来涂覆粗骨料（碎石）作为共振骨料（RA）。然后使用传统的机械混合技术将 RA 掺入超混凝土中。结果表明，超混凝土的阻尼比显着增加了 175%，这主要归功于 RA 优异的能量耗散能力。此外，RP涂层消除了混凝土中的界面过渡区（ITZ），从而增强了其抗渗性和抗冻融性。这项研究提出了一种开发具有高阻尼性能的环保水泥材料的创新方法。