Influences of Additives on Performances of Cementation of Simulated Radioactive Fluoride Liquid Wastes

The influences of additives with zeolite, vermiculite, silica fume and quartz sand on the performances of the cementation of simulated radioactive fluoride liquid wastes containing Cs⁺, Sr²⁺, F^-, etc. were studied. Different additives were added into the cement formulation, then the setting time, fluidity and temperature-rising of the cement slurry were investigated. And the 28 d compressive strength of the cemented waste form and strength losses after water/freezing resistance tests was investigated. The shock resistance and leaching tests were also carried out. Through series of comparison, the study obtains the cement formulation which can satisfy cementation of simulated radioactive fluoride liquid wastes. The performances of the cemented waste form can meet the demands of GB 14569.1—2011.