Evaluation of Chemical Composition, Physical Properties and Pozzolanic Activityof Fly Ash in Florida

摘要

This investigation addresses the effect of variable loading in power stations onthe material properties and quality of the produced Class F Fly Ash. In addition, two Class C fly ashes were examined for sulfate durability. The properties of the as-received Class F fly ash that were quantified include: oxides composition, oil content, carbon content, LOI, particle size distribution, fineness, mortar cube strength and reacted fly ash fraction. Class C fly ash was examined for its sulfate performance through assessing expansion measurements and cube strength. In addition, the minerological composition of the crystalline phases in the as-received ash and the hydrated mortar was examined using x-ray diffraction. The pozzolanic activity was found to be a function of the fly ash fineness and carbon content.