VERY HIGH-PERFORMANCE MICRO-CONCRETES FOR THE CONFINEMENT OF INDUSTRIAL-WASTE

Industrial waste is very often immobilized in metallic casks which are then installed in concrete confinement enclosures. High performance concrete types can provide an elegant solution for the storage of waste, with the possibility of avoiding double-wall confinement. This study analyses the behavioural evolutions of very high performance microconcretes with a fibre content, with particular attention to the nature of the aggregates and the nature, the dimension and the quantity of the fibres. The characteristics obtained, which are generally of a very high order, result from the very low porosity and permeability of the matrix. In a similar manner we deal with the problem of sealing the enclosure, by using a special mortar which provides excellent sealing for the container through perfect binding between the walls of the enclosure and the plug.