Recycling of coal ash as a building material via a stabilization/solidification method

Abstract

This study examines stabilization/solidification (S/S) techniques for coal ash/cement systems that involve the production of construction products while minimizing contamination and recycling the coal ash (CA). In these techniques, the polluted components of coal ash are fixed in a cement body via adsorption and confinement mechanisms, and thus, the possible impact of these pollutants on the environment is minimized. In the first step of this study, the physical, chemical, radioactive and mineralogical properties of the material used were determined. Second, coal ash (CA) was used to replace portland cement (PC) in the following proportions: 0%, 5%, 10%, 15%, 20%, 25%, 30%, 40% and 50% of PC by weight. Finally, the usability of coal ash as a construction product and the environmental effects of such usage were determined. © 2013 Global NEST Printed in Greece. All rights reserved.