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Silica fume admixture effect on the dynamic properties of concrete

机译：硅粉掺合料对混凝土动力性能的影响

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摘要

The construction of concrete structures using silica fume (SF) additions is a common practice because it is well known that this pozzolanic material improves the compressive strength of concrete, among many other mechanical and physical properties. The response of a structure under dynamic actions is highly determined by the dynamic mechanical properties of its building material. In this work, it has been studied the influence of SF additions in quantities ranging from 0% to 15% of cement mass on the dynamic and static mechanical properties of concrete, such as: resonant frequencies, dynamic and static modulus of elasticity, damping ratio, compressive strength and flexural strength. The results prove that SF additions or replacements reduce both the dynamic modulus of elasticity and damping ratio of concrete. The dynamic elastic properties of concrete, with and without SF, present higher values than their static counterparts. These differences are smaller in concretes containing SF.
机译：使用硅粉（SF）添加物来建造混凝土结构是一种常见的做法，因为众所周知，这种火山灰材料不仅可以改善混凝土的抗压强度，而且还可以改善许多其他机械和物理性能。结构在动态作用下的响应高度取决于其建筑材料的动态机械性能。在这项工作中，已经研究了水泥质量从0％到15％的SF添加量对混凝土动，静力学性能的影响，例如：共振频率，动静弹性模量，阻尼比。 ，抗压强度和抗弯强度。结果证明，SF的添加或替代会降低混凝土的动态弹性模量和阻尼比。有和没有SF的混凝土的动态弹性性能都比其静态对应物更高。这些差异在含有SF的混凝土中较小。

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