碳硫硅钙石形成机制的定量分析  

Quantitative Analysis on Formation Mechanism of Thaumasite

作　　者：高礼雄[1] 杜雪刚[2] 孔丽娟[1] 

机构地区：[1]石家庄铁道大学材料科学与工程学院,石家庄050043 [2]中国建筑材料科学研究总院,国家绿色建材重点实验室,北京100024

出　　处：《硅酸盐学报》2012年第5期711-714,共4页Journal of The Chinese Ceramic Society

基　　金：中国建筑材料科学研究总院绿色建筑材料国家重点实验室开放基金“水泥基材料中碳硫硅钙石的定量表征”(533001)资助项目

摘　　要：设计了两种人工合成碳硫硅钙石的实验方法以研究水泥基材料中碳硫硅钙石的侵蚀机理。用X射线衍射、Raman光谱对水泥基材料不同龄期的反应产物进行定性分析,并采用Rietveld方法进行定量表征。结果表明:碳硫硅钙石在不能生成钙矾石的环境下仍可形成,说明其可以直接反应生成;在有钙矾石生成的环境下,碳硫硅钙石也可生成,表明碳硫硅钙石形成机理存在Woodfordite转变机理。钙钒石的存在提高了碳硫硅钙石的产率。相比较而言,Woodfordite转变机理比直接生成机理更容易发生,且两种机理可以同时并存。Two synthesis methods of thaumasite generation were used to investigate the mechanism of thaumasite attack to cement based material.The reaction products were analyzed qualitatively by X-ray diffraction,laser Raman spectroscopy and the Rietveld method,respectively.Thaumasite could be directly generated without any ettringite.However,thaumasite generated with ettringite was due to the Woodfordite transformation mechanism.The presence of ettringite could improve the formation rate of thaumasite.The generation of thaumasite with ettrigite due to the Woodfordite transformation could be easier than the direct generation of thaumasite without ettringite.The generation mechanism of thaumasite with and without ettringite coexisted.

关 键 词：水泥基材料 碳硫硅钙石 RIETVELD方法 定量分析 

分 类 号：TU528[建筑科学—建筑技术科学]