轻集料与水泥石界面区元素分布特征研究  

Research on the Elements Distribution Characteristics in the Interfacial Transition Zone(ITZ) Between Lightweight Aggregate and Cement Paste

作　　者：王发洲[1] 周斌[1] 彭艳洲[1] 胡曙光[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2005年第3期30-33,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50272045);硅酸盐材料工程教育部重点实验室(武汉理工大学)开放基金(SYSJJ200410).

摘　　要：研究了高强页岩陶粒与水泥石及其界面区的元素分布特征,探测出界面区宽度约为20～30 μm,研究表明界面区Ca2+向轻集料方向迁移、轻集料内水分向界面区扩散,结果使得界面区的硅钙比较基体小,结构较基体密实,显微硬度较基体大;分析了粉煤灰、矿渣对两相界面组成、结构与性能的影响规律,结果表明随着粉煤灰、矿渣的掺入,界面区硅钙比增大,界面区水泥石的孔隙率和平均孔径显著降低,显微硬度提高,界面得到增强.The elements distribution characteristics in the interfacial transition zone between lightweight aggregate and cement paste were studied by backscattered electron imaging and EDXA. The results show that the lightweight aggregate is a rich-silicate phase and the cement paste is a rich-calcium phase. From lightweight aggregate to cement paste, the value of calcium element increases gradually and gets content. According this, the depth of interface transition zone was calculated which is about 30 μm, The results show that the S/C ratio in ITZ increases, and the porous ratio in ITZ decreases, and the micro-hardness in ITZ increases with the adding of fly ash, and blast furnace slag. The law of mineral additions on the compounds and structure of interfacial transition zone were discussed.

关 键 词：轻集料 界面 元素分布 

分 类 号：TU528.2[建筑科学—建筑技术科学]