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首页> 外文期刊>Magazine of Concrete Research >Effect of air content on the rheology of foamed concrete
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Effect of air content on the rheology of foamed concrete

机译：空气含量对泡沫混凝土流变性的影响

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Foamed concrete is a lightweight concrete produced by the incorporation of foam into cement paste or mortar. This research was carried out to investigate the effect of foam content on standard workability tests results and also the rheological parameters of foam concretes. As previous studies on this topic were mainly limited to air contents of up to about 40%, the present study considered mixes with up to 91% air content in order to provide information regarding foam concretes of low densities. The results of rheological measurements show an increase in yield stress due to foam incorporation, and the effect is intensified with increasing foam contents. With regard to plastic viscosity, the results show that incorporation of moderate foam volumes results in a reduction in the plastic viscosity of the mixes. However, further increases in foam contents result in a reversal of the trend and plastic viscosities are substantially increased at high foam volumes. The results are significant, as they show a serious reduction in the workability of foam concretes at high air contents.
机译：泡沫混凝土是通过将泡沫混入水泥浆或砂浆中而生产的轻质混凝土。进行这项研究以研究泡沫含量对标准可加工性测试结果以及泡沫混凝土流变参数的影响。由于以前关于该主题的研究主要限于空气含量不超过40％，因此本研究考虑了空气含量不超过91％的混合料，以便提供有关低密度泡沫混凝土的信息。流变学测量的结果表明，由于掺入泡沫，屈服应力增加，并且随着泡沫含量的增加，该作用增强。关于塑料粘度，结果表明掺入适度的泡沫体积导致混合物的塑料粘度降低。然而，泡沫含量的进一步增加导致趋势的逆转，并且在高泡沫体积下塑性粘度显着增加。该结果是有意义的，因为它们表明在高空气含量下泡沫混凝土的可加工性大大降低。

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