石灰石粉对水泥基材料抗碳硫硅钙石侵蚀破坏的定量分析  

Quantitative analysis of effect of limestone powder on resistance of thaumasite attack to cement-based materials

作　　者：高礼雄[1] 杜雪刚[1] 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

出　　处：《东南大学学报（自然科学版）》2012年第3期483-486,共4页Journal of Southeast University：Natural Science Edition

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资助项目(533001)

摘　　要：为了研究石灰石粉对水泥基材料抗碳硫硅钙石侵蚀性的影响,将掺0%,16%和30%石灰石粉的试件在温度5℃、质量分数10%的MgSO4溶液中养护,然后对不同龄期试件进行力学性能测试,并对侵蚀产物进行X射线衍射、拉曼光谱定性分析及Rietveld方法定量分析.结果表明:在温度5℃、10%MgSO4溶液侵蚀环境下,纯水泥试件侵蚀产物中碳硫硅钙石占0.99%,掺16%和30%石灰石粉水泥试件中碳硫硅钙石分别占7.54%和12.68%,且随着石灰石粉掺量的增加碳硫硅钙石的生成量随之增多,发生碳硫硅钙石型硫酸盐侵蚀破坏的可能性增大.In order to study the effect of limestone powder on the resistance of thaumasite attack to cement-based materials, specimens made with addition of 0%, 16% and 30% limestone powder were stored in 10% magnesium sulfate solution at 5 ℃. Their strength were measured after different storage times. Reaction products were analyzed qualitatively by X-ray diffraction （XRD）, laser Ra- man spectrum and Rietveld method. The results indicate that thaumasite accounts for 0.99% in the erosion products of pure cement specimens, and 7.54% and 12.68% respectively in the erosion products of 16% and 30% content limestone powder specimens in 10% MgSO4 sulfate solution at 5℃. This means that the resistance of thaumasite attack to cement-based materials becomes poorer with the increase of limestone powder content.

关 键 词：水泥基材料 硫酸盐侵蚀 石灰石粉 碳硫硅钙石 定量分析 

分 类 号：TU528[建筑科学—建筑技术科学]