摘要
本文以沸石、硅灰、石英砂为添加剂,按照质量比m(沸石)∶m(硅灰)∶m(石英砂)∶m(水泥)=1∶1∶3∶10配方对模拟放射性含氟废液进行水泥固化。由配方得到的水泥浆流动度和初、终凝时间满足桶内固化要求。测定了水泥固化体28d的抗压强度、抗浸泡性和抗冻融性实验后的强度损失,进行了抗冲击性能测试和模拟核素浸出实验。结果表明,该配方可有效地固化模拟放射性含氟废液,固化体28d抗压强度、各项实验强度损失和模拟核素浸出率均满足GB 14569.1—2011的要求。水泥固化体的F-浸出率很低,XRD显示F-以CaF2形式存在。废液中F-质量分数控制在1%较为合适,此时水泥固化体终凝时间为14h,F-的42d浸出率为2.54×10-3 cm/d。
In this paper,the formulation with ratio of m（zeolite）∶m（silica fume）∶m（quartz sand）∶m（cement）=1∶1∶3∶10was used to solidify the simulated radioactive fluoride liquid wastes.The fluidity and setting time of the cement slurry meet the requirements of in-drum cement solidification.28 dcompressive strength and strength losses after water/freezing resistance tests were investigated,and the shock resistance and leaching nuclide test were also conducted.The results show that it is feasible to solidify simulated radioactive fluoride liquid wastes with the formulation as prepared.The 28 dcompressive strengths,strength losses after tests and simulated nuclide leaching rates of the cement solidified waste form meet the demands of GB 14569.1—2011.Leaching rate of fluoride ion in the cement solidified waste form is very low.XRD patterns show that fluoride ion is in the form of CaF2.The suitable content of fluoride ionin the liquid wastes is 1%,the final setting time of the cement solidified waste form is14 h,and the leaching rate of the fluoride ion is 2.54×10-3 cm/d after 42 d.
作者
刘学阳
钱正华
乔延波
孙亚平
马洪军
王帅
LIU Xue-yang QIAN Zheng-hua QIAO Yan-bo SUN Ya-ping MA Hong-jun WANG Shuai(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2016年第11期1943-1948,共6页
Atomic Energy Science and Technology
基金
中国科学院战略性先导科技专项资助项目(XDA02050000)
关键词
含氟废液
水泥固化
性能测试
氟离子浸出
fluoride liquid waste
cementation
performance test
fluoride ion leaching
