This paper expounds mineral composition, physical and chemical characteristics, activity and its evaluation of natural volcanic ash which is used as concrete admixture.
论述了天然火山灰用作混凝土掺合料的矿物组成、物化性能；火山灰活性及其评定。
The super-accelerate complex admixture of concrete was obtained by mixing inorganic super-accelerate stimulant composition with a little organic surface active agent.
本文介绍了以无机超早强激发剂辅与少量有机表面活性剂复合而成的超早强复合外加剂。
The super-accelerate complex admixture of concrete was obtained by mixing inorganic super-accelerate stimulant composition with a little organic surface active agent.
本文介绍了以无机超早强激发剂辅与少量有机表面活性剂复合而成的超早强复合外加剂。
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