活性混合材料是矿物质材料（天然或人工），经粉磨加水后，本身不硬化或硬化很慢，但与其它胶凝材料（石灰、水泥）搅成胶泥状态后，不但能在空气中硬化，而且能在水中继续硬化，并且有一定的强度，这类物质即称为活性混合材料。
再经软练胶砂强度试验，证明是理想的活性混合材料。
Through plastic mortar strength test, it has been proved as the ideal active admixture.
本文阐明了九店凝灰岩用作水泥工业活性混合材料的可行性。
This thesis explains the results of a series of tests done to explore the feasibility of using the Tuff excavated in Jiudian as active admixture in Cement industry.
介绍一种大规模利用自燃煤矸石的方法，即利用其作活性混合材料、粗细骨料生产内隔墙板。
A method of extensively making use of spontaneous combustion gangue is introduced that is to use it as active mixture, coarse and fine aggregates to produce partition panel.
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