Centrifuge Model Tests on Failure of Cementstabilized Fly Ash Ground

Abstract

ABSTRACT An experimental investigation was carried out to study the feasibility of using fly ash, the industrial residue of thermo-electric power plants, as a fill material for waterfront retaining structures. In the study, centrifuge model tests were performed on cement stabilized fly ash ground to investigate its failure pattern and active earth pressure acting on the retaining wall. The stabilized fly ash ground was brought to an acceleration field of 70 g and then the retaining wall was allowed to rotate about its bottom to cause ground failure. As a result of this study it was found that the failure pattern of fly ash ground mixed with a small amount of cement is characterized by a vertical tension crack and a straight shear failure which is much different from those of ordinary clay or sandy ground. It was also found that the active earth pressure of the cement stabilized fly ash ground was lower than ordinary sand fill and could be reasonably estimated by a proposed method incorporating the failure pattern of the ground.