铝相对单矿浆体中碳硫硅钙石形成的影响  

Effect of Al Phase on the Formation of Thaumasite in Single Mineral Paste

作　　者：田博[1] 张乘 何超 李相国[1] 姜东兵 吕阳[1] 蹇守卫[1] 周阳[3] TIAN Bo;ZHANG Cheng;HE Chao;LI Xiangguo;JIANG Dongbing;LYU Yang;JIAN Shouwei;ZHOU Yang(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Huaxin Cement Co.,Ltd,Wuhan 430070,China;College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi 832000,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [2]华新水泥股份有限公司,湖北武汉430070 [3]石河子大学水利建筑工程学院,新疆石河子832000

出　　处：《材料科学与工程学报》2024年第5期723-728,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51572207)。

摘　　要：为探究不同铝相对碳硫硅钙石形成的影响,本研究采用单矿C 3S制备浆体,利用X射线衍射仪(XRD)、傅里叶红外光谱(FTIR)、固体核磁共振仪(NMR)等测试方法,研究了NaAlO_(2)和C 3A对单矿浆体在硫铝比为9的硫酸钠溶液侵蚀作用下碳硫硅钙石形成的影响。结果表明:即使侵蚀9个月,NaAlO_(2)中可溶性的铝也不会导致碳硫硅钙石生成,原因可能是水化产物中大量四配位铝相结构的Al(OH)_(3)会抑制碳硫硅钙石的形成。C_(3)A的加入会促进碳硫硅钙石的生成,但是其生成时间迟于钙钒石,且侵蚀产物以碳硫硅钙石-钙矾石固溶体的形式存在。此研究对于碳硫硅钙石形成的研究及预防提供了一定的理论依据。To explore the influence of different aluminum phases on the formation of thaumasite,mineral C 3S was used to prepare single ore paste in this paper.The effect of NaAlO_(2) and C 3A on the formation of thaumasite in cement paste with a S/Al ratio of 9 was systematically studied by XRD,FTIR and NMR,and sodium sulfate solution was selected as erosion medium.The results show that the soluble aluminum in NaAlO_(2) would not lead to the formation of thaumasite,even if the sample was eroded for 9 months,being attributed to the formation of Al(OH)_(3) with hexaherrally coordinated aluminum(AlO_(4))that inhibit the formation of thaumasite.The addition of C_(3)A will promote the formation of thaumasite,while the formation time is later than that of ettringite.The erosion products exist in the form of thaumaiste-ettringite solid solution.The study provides a theoretical basis for the research and prevention of the formation of thaumasite.

关 键 词：碳硫硅钙石 铝相 硫铝比 硫酸盐侵蚀 固体核磁共振 

分 类 号：TU528.1[建筑科学—建筑技术科学]