Abstract: By adding slag, fly ash and zeolite as mineral admixture modifying the ordinary Portland cement, a process recipe of big solid solubility, low exudation rate, good flow ability and low nuclide leaching rate was obtained. Influences of material composition, liquid-cement ratio, salt concentration and coagulant over extended fluidity, bleeding rate and setting time were investigated. Results show that: use mineral admixtures instead of cement can exert pozzolanic effect and water-reducing effect, improving the waste liquid capacity and bleeding and salting-out of the solidification form; the slag and fly ash can improve the fluidity of paste, zealot significantly prolong the setting time; As the salt concentration increases, the expansion of fluidity and bleeding rate decreases, the setting time extends; Triethanolamine can effectively shorten the construction of cement solidification time. When the content is 1%, setting time of PSFZ shortened to 4 h 22 min , final setting time shortened to 5 h 2 min, satisfies the requirement of national standard.

Key words: cement solidification form, simulated nuclear liquid waste, parameters