【摘要】 用扫描电镜观察了国内22种粉煤灰的形貌,发现粉煤灰由三种主要颗粒组成,即球形颗粒、不规则的熔融颗粒(熔融玻璃体及多孔疏松熔融玻璃体)、炭粒。根据此三种颗粒的组成和比例,可将粉煤灰分成四类:Ⅰ类含球形颗粒;Ⅱ类除含球形颗粒外还有少量熔融玻璃体,该二类均为质量良好的粉煤灰,可以用作建筑材料;Ⅲ类主要为熔融玻璃体和多孔疏松熔融玻璃体,必需加以磨细方可使用;Ⅳ类为疏松熔融玻璃体及炭粒组成,不能用作建筑材料。更多还原

【Abstract】 SEM investigation on the morphology of twenty-two domestic pulverised fly ash (PFA)samples shows that the PFA samples are composed of three different particles, they arespherical particles, irregular fused particles(fused and porous fused particles) and porouscarbon particles. Based on the composition and the ratio of these particles, the PFA canbe divided into 4 kinds. The first kind of PFA is composed of spherical particles;the secondis composed of spherical particles and a small part of irregular fused particles. Thesetwo kinds of PFA are of good qualities and are suitable for making cementitious buildingmaterials. The third kind of PFA is mainly composed of fused and porous fused parti-cles, to which it is not as good as the two kinds mentioned above, and must be furtherpulverized before use.The fourth kind which is composed mainly the porous fused particlesand carbon particles is the poorest PFA and can not be used as cementitious buildingmaterials.更多还原