This paper studies the influence of phosphate, calcareous material on set time of water glass-slag cement.
研究了磷酸盐、含钙材料对水玻璃—矿渣水泥的凝结时间的影响。
Lime with high activity should be utilized as calcareous material to produce super-light xonotlite and the activity of siliceous material should match that of calcareous material.
制备超轻硬硅钙石制品必须使用高活性的石灰作为钙质原料，而所使用的硅质原料活性应与之相匹配。
All these indicate that calcareous algae can be an important source material for natural gases.
这表明钙质藻类可能是天然气的一种重要母质来源。
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