碱对粉煤灰的活化和微观结构的影响

The Influence of Alkalinity on Activation and Microstructure of Fly Ash

用X-射线、SEM研究了粉煤灰在不同碱度环境下的活化机制、水化产物和微观结构。研究表明:粉煤灰硅酸盐水泥在常温下养护,粉煤灰的反应能力较低,这是因为在Ca(OH)2存在条件下的活化很慢,只有提高养护温度或在复合碱和硫酸盐存在条件下才有利于结构的解体和水化产物的稳定。

Active mechanism,hydrates and microstructure of fly ash were studied by X\|ray and SEM analysis.Results showed that reaction of fly ash was very low in the fly ash cement,because Ca(OH)\-2 had less activation capability on fly ash at room temperature.Only if enhancing curing temperature and adding blended alkalinity and sulfate,it is more valid on the breaking of structure and stability of hydrates.\;