The subject matter presented in the book is sufficiently comprehensive and the knowledge gained through it will permit wide ramification in predicting the various physico-chemical, mineralogical, morphological features of the fly ash particles. With growing awareness amongst the environmental management statutory body, planners, thermal power plant engineers and general public as well, for proper utilization of fly ash - a coal combustion byproduct, it has become necessary to review the whole situation and become necessary to develop an integrated method for characterization of fly ash and its subsequent utilization.