放射性废离子交换树脂特种水泥固化体的微观结构分析  

Microstructural study of spent ion exchange resin ASC cement-solidification matrix

作　　者：李俊峰[1] 周耀中[1] 王建龙[1] 赵璇[1] 云桂春[1] 

机构地区：[1]清华大学核能技术设计研究院环境技术研究室,北京100084

出　　处：《核科学与工程》2004年第4期340-343,共4页Nuclear Science and Engineering

摘　　要：研究了特种水泥 (ASC)树脂固化体的微观结构。用压汞实验比较了ASC特种水泥的树脂固化体和普通硅酸盐水泥 (OPC)固化体多孔性能 ,通过电镜扫描 (SEM )观察比较了ASC和OPC的微观晶体结构。分析结果发现ASC水泥固化体具有较好的孔形结构 ,这是ASC固化体浸出率低的原因 ;ASC水泥固化体晶体呈针状结构 ,OPC水泥固化体晶体呈片状结构 ,针状结构的力学性能和结构强度要比OPC的片状结构好 ,该结构是ASC固化放射性废树脂包容量大、强度高的根本原因。In this paper, the microstructure of Spent Io n Exchange Resin ASC cement-solidification matrix was studied. Pore characters of cement-solidification matrix of ASC and OPC were compared using Mercury Intr usion Experiments,crystal microstructures of ASC and OPC were studied by Scanni ng Electron Microscope (SEM). The results showed that the pore structures of ASC matrix were better than those of OPC, and this determined the low leaching rate s of ASC. From SEM results the needle crystals of ASC and flat crystals of OPC w ere observed, the needle crystals were the basic reason of high strength and res in loading of ASC solidification matrices.

关 键 词：特种水泥 树脂固化 固化体 离子交换树脂 微观结构 普通硅酸盐水泥 多孔性 ASC 观察 实验比较 

分 类 号：TL941.111[核科学技术—辐射防护及环境保护] TQ172[化学工程—水泥工业]