INORGANIC SOLDIFYING MATERIAL AND SOLIDIFICATION OF RADIOACTIVE WASTE DISPOSAL USING SAME MATERIAL

摘要

PURPOSE:To obtain a hydraulic hardening agent blended with an inorganic compound capable of maintaining a high partition coefficient of Ca by using a solidifying material to increase exchange capacity of cation of adsorbent in cement paste having high pH and solidifying radioactive waste disposal. CONSTITUTION:An inorganic compound having properties wherein adsorption site (ion exchange group) of cation is increased in hydrolysis reaction in an atmosphere of high alkalinity (pH>10) and Ca adsorption capacity is increased rather in alkalinity is prepared. Then the inorganic compound is added to paste of hydraulic solidifying agent to give a solidifying agent. A silicon compound containing a skeleton comprising a siloxane bond and silanol group may be cited as the inorganic compound. Then radioactive waste disposal is solidified using the solidifying agent.