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The properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw fly ash in applications, such as in cementitious materials and in the recovery of certain rare elements from raw fly ash. To investigate the differences in individual particles, four pulverized raw fly ashes from thermal power plants of the Czech Republic were used in this research. It was observed from FE-SEM that all four fly ashes consist of glassy hollow spherical, solid spherical, porous spherical, bright spherical, porous slaggy and compact slaggy particles. Box and whisker diagrams were plotted from the data of EDX individual particle analyses, which showed that the data of percentages for the Si, Al, and Fe elements is more scattered as compared to other elements.
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El Dr. Engr. Usman Haider ha finalizado recientemente su doctorado en Ingeniería Civil con especialización en Ingeniería Física y de Materiales en la Universidad Técnica Checa de Praga, República Checa. Ha trabajado durante años en el estudio de las propiedades de diferentes fuentes de cenizas volantes de carbón con diferentes equipos sofisticados de laboratorio.
