NUMERICAL INVESTIGATION OF CEMENTED-BASED MATERIAL TO BE USED FOR PACKAGING SYSTEM

The selection of immobilization waste technologies based on cementation should demonstrate that the obtained matrices are reliable, durable, and stable. This study deals with the numerical simulation of cemented package. Both the normal and accidental storage condition are considered. The FE numerical model is adopted to benchmark several RLOW simulants composition and correlate/compare the structural properties. A 3D cylindrical shaped model was implemented. Homogeneous mechanical material properties of defined stiffness were assumed. The thermal properties have been obtained experimentally by performing hot wire test on several samples of the cement inert matrix. These data were used as input for the numerical simulation. Moreover, pseudo- dynamic analysis was carried out in order to determine the damage level in the case of an accidental drop. Ageing effects have been also investigated. Results indicate that the thermal conductivity monotonically decreases of 20% as the temperature increases up to 800 degrees C. The compressive strength, even reduced mainly as consequence of increased material porosity, confirmed to be dependent on w/c ratio. The results obtained were consistent with literature values, indicating a strong correlation between the simulation results and the established knowledge in the field.