Example of Cement Solidification and Compounding of Incinerated Fly Ash Containing Radioactive Cesium

Abstract

At Clean Center Futaba, the final disposal site for specific waste generated at the specific reconstruction and revitalization base, fly ash generated during the incineration of specific waste is solidified in cement since November 2023 in order to prevent radioactive cesium leaching. The properties of fly ash, such as its constituent components, change depending on the incineration method and the origin of the incinerated waste, and these properties affect its strength and the effectiveness of suppressing the leaching of radioactive cesium. Since it is necessary to take such diverse fly ash conditions into consideration, a mix design has not been established. A mix test was conducted using the fly ash to be used, while referring to existing research results. This report provides an overview of the pre-mix test conducted before the actual construction of the cement solidification.