The microstructures of fly ash is compared with that of pozzolan in this paper. The basic characteristics of fly ash microstructure is expounded, and also the physical and chemical activity of fly ash due to its shape and microstructure.

• 本文比较了粉煤灰与火山灰微观结构，阐述了粉煤灰结构的基本特征以及形态与结构赋予粉煤灰物理、化学活性特征。