大掺量碱激发低等级粉煤灰混凝土的配制

Concrete Batching with a Large Proportion of Alkali-activated Low Grade Fly Ash

通过不同掺量和粒度的碱激发低等级粉煤灰等量取代水泥,讨论了粉煤灰掺量和粒度对混凝土强度和坍落度的影响。试验结果表明:混凝土强度随粉煤灰掺量的增加而降低,随粉煤灰粒径的降低而增加;在形同掺量条件下,粉煤灰粒径越小,混凝土的工作性能越差。

In replacing cement with alkali-activated low grade fly ash of different proportions and particle sizes, the influence of the proportion and size of fly ash on the strength and slump of concrete is discussed. Test shows that the strength of concrete decreases with a rising proportion of fly ash but increases with a smaUer particle size of fly ash; and it also indicates that a smaller particle size of the fly ash at the same proportion results in worse concreting performance.