掺重金属氧化物水泥浆体的性能和结构  

Properties and Microstructure of Cement Paste Incorporating Heavy Metal Oxides

作　　者：张亚梅[1] 孙伟[1] 施展[1] 

机构地区：[1]东南大学材料科学与工程系,江苏南京210096

出　　处：《建筑材料学报》2002年第3期274-278,共5页Journal of Building Materials

摘　　要：研究了低掺量重金属氧化物ZnO ,PbO和CuO对水泥浆体的凝结时间和力学性能的影响 ,并借助SEM和XRD探讨了它们对水泥浆体微结构的影响 .研究表明 ,即使在低掺量的条件下 ,不同种类的重金属氧化物对水泥凝结过程的影响也存在显著差异 ,但对力学性能的影响则相对较小 .重金属氧化物的加入所引起的硬化水泥浆体微结构的改变也与重金属的种类有关 ,XRD图谱中 ,CH ,AFt的峰位由于重金属氧化物的作用均较常规峰位略有偏移 .The impact of heavy metal oxides, such as ZnO, PbO and CuO, on the setting time and mechanical properties of cement pastes was investigated. SEM and XRD were used to examine the microstructure of cement paste as well. The results show that the setting process is greatly influenced due to the addition of heavy metal oxides, even with low contents. By the contrast, however, the mechanical properties are less influenced. The change of the microstructure of cement pastes with heavy metal oxides depends on the type of heavy metal. It is revealed that the XRD peaks of CH and AFt deviate slightly from the common positions.

关 键 词：氧化物 水泥浆体 重金属 凝结 力学性能 微结构 

分 类 号：TQ172.1[化学工程—水泥工业]