COLLAPSIBLE BEHAVIOR OF COMPACTED COAL ASH

Coal ash a waste material is widely used in construction of fills and embankments. Compacted coal ash fills are likely to undergo collapse on inundation, permeation, saturation, sluicing or infiltration of rainwater, depending upon the circumstances. The susceptibility to collapse compression has become the most significant geo-technical property of the fill. The present study has worked out the various factors which are influencing the collapsible behavior of coal ash. Consolidation test were performed on compacted fly ash (FA), bottom ash (BA) and the mixture of the two (45% FA and 55% BA). The results revealed that BA and the mixture of the two show negligible collapse while the FA is more susceptible to collapse.