Fly ash as a sustainable and waste: material

Abstract

The burning of coal in the process of generating electricity, leads to the production of solid waste such as the fly ash and bottom ash. Numerous studies had been carried out to determine the mechanical properties of fly ash and also bottom ash. An extension of these studies is necessary in order to explore further usage of these ashes, in particular when mixed together in optimum percentage. The first aim of this study is to provide a review of fly ash in construction. The second aim is to develop knowledge readers and researchers for advantages and disadvantages of fly ash to help focus future research in this area. In this paper, a brief review is presented of the theory and properties practice of fly ash as a waste and sustainable material. Mechanisms are discussed on fly ash in its applications, improves the workability, minimizes cracking due to thermal and drying shrinkage, and enhances durability to reinforcement corrosion, sulfate attack, and alkali-silica expansion.