[en] Information is given on the process of incorporating spent ion-exchange resins into bitumen in one step, continuously and in a closed technology. Examinations and experiments were carried out in order to obtain information on the behaviour of the starting materials and products of the planned process and technology. Results show that the commercial resins Varion KS and Varion AT-660 do not suffer from thermal decomposition at 80⁰C. Nuclear power plant grade resins, however, are decomposing at this temperature. The spent resins and the bitumen applied do not suffer from any notable thermal decomposition at the planned, maximum 160⁰C temperature of the incorporation. Thermal stability of the cation-exchange resins is higher than that of the anion-exchange resins. Water content of the products obtained by incorporation carried out at 160⁰C, in a batchwise operation, fluctuated independently of the original water content of the resins and of the specific quantity of the incorporated resin - between 2 and 3%