Volume change behavior of sea water exposed coal ash using hyperbolic model

Abstract

The Philippines greatly relies on coal-fired power plants as a source of electricity. These power plants produce a by-product or waste material called coal ash. In recent years, the country has been experiencing continuous urbanization. As a result, there is an increase in the demand for electricity consumption. This can also result in an increase in production of coal ash. There are several studies that suggest the potential of coal ash as a construction material. In this study, the coal ash was exposed to seawater. In order to investigate the potential of coal ash as a construction material to structures that will be exposed to the sea. Consolidated drained triaxial test was performed considering the following level of exposure namely, no exposure, immediate exposure, and prolonged exposure. A hyperbolic model was used to model the stress-dependent volume change behavior of the material towards sea water. In the model, the Poisson's ratio parameters were determined. The tangent value of Poisson's ratio and its relationship with the applied stressed was evaluated.