掺合料复合化对高强混凝土强度及显微结构的影响

Effect of Compound Mineral Admixture on the Strength and Microstructure of HSC

本文主要讨论粉煤灰及沸石粉单一组分、复合组分对高强混凝土强度及显微结构的影响。在早期 ,掺合料的主要作用是微集料效应 ;特别是复合双掺时 ,次级颗粒级配更趋合理 ,叠合效应显著。在后期 ,掺合料的火山灰效应明显。沸石的独特结构使大掺量沸石粉的混凝土强度增幅较大。

? In this paper,effects of fly ash,zeolite and their compound on the strength and microstructure of HSC are discussed.In earlyday the main effect of mineral admixture is micro agg regate effect When fly ash is compounded with zeolite,the minor particle size distribution is getting more reasonable and concrete is getting more dense.In a Long time effect of mineral admixture is mainly dertermined by pozzolanic reaction.The special structure of zeolite increase the strength of concrete with a large amount of zeolite after one year.