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首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20060108-11; Chengdu(CN) >The Effect of Meta Kaolines on the Activation of Waste Concrete Sludges
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The Effect of Meta Kaolines on the Activation of Waste Concrete Sludges

机译：偏高岭土对废混凝土污泥活化的影响

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摘要

Waste sludges produced from the recycling of concretes contain a large amount of aggregate powders and pre-reacted cements so that they have no more cementing properties. However, since they contain unreacted Ca(OH)_2, pozzolanics such as blast slag or meta kaoline can activate the waste concrete, and they can be reused as low-grade cement or pozzolanics. When meta kaoline was added with some other pozzolanic materials such as gypsum or blast slags, the density was increased so that the compressive strength, especially early stage of curing time, was enhanced. When meta kaolin was added, more densified C-S-H gel networks were formed at aggregates, and ettringites were produced between the C-S-H gel networks.
机译：回收混凝土产生的废渣含有大量的骨料粉和预反应的水泥，因此它们不再具有固井性能。但是，由于它们含有未反应的Ca（OH）_2，火山灰（如高炉渣或偏高岭土）可以活化废混凝土，并且可以作为低级水泥或火山灰再利用。当将间高岭土与石膏或高炉渣等其他火山灰材料一起添加时，密度增加，从而增强了抗压强度，特别是固化时间的早期。当添加间高岭土时，在聚集体上形成了更致密的C-S-H凝胶网络，并且在C-S-H凝胶网络之间产生了钙矾石。

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