Based on some experiments, low-alkali cement with high-performance was produced by using low-grade limestone, powdered sandstone and bauxite slag, etc.

在试验基础上，突破传统的水泥配料模式，利用低品位石灰石、砂岩、矾士渣等生产出了高性能低碱水泥。

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Also there are many ancient trees, which would have been damaged by the alkali from the cement. We have had to install a special irrigation system.

还有，这里有许多古树，水泥的碱会损坏这些它们，我们不得不安装一个特殊的灌溉系统。

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The influences of curing temperature and alkali contents of cement on expansion of mortar bars are investigated.

研究了养护温度和水泥碱含量（质量分数，下同）与硅质集料砂浆试样膨胀的关系。

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