XRD-Rietveld法用于水泥基材料物相的定量分析  

Quantitative analysis of phases for cement-based materials by XRD-Rietveld method

作　　者：李华[1] 孙伟[2] 刘加平[1] 

机构地区：[1]江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,江苏南京211103 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《混凝土》2013年第1期1-5,共5页Concrete

基　　金：国家重点基础研究发展计划(973计划)(2009CB623203);国家自然科学基金(51078186);江苏省自然科学基金(BK2010071)

摘　　要：采用XRD-Rietveld全谱拟合法基于TOPAS软件对试验用水泥粉末及按一定比例配制好的水泥-氢氧化钙混合样品进行了物相定量分析,比较了Rietveld拟合分析结果与热分析测试结果及实际配制值的吻合度,并对硫酸钠溶液侵蚀后的水泥浆体中侵蚀产物进行了定量分析。研究结果表明:Rietveld拟合分析结果与混合样品的实际配制值显示出了很好的一致性,且Ri-etveld拟合分析结果的准确程度与常用于氢氧化钙含量测试的TG/DSC法相当;通过添加合适的内标物,XRD-Rietveld法可以有效的用于水泥基材料硫酸盐侵蚀产物的定量分析。XRD-Rietveld method has been adopted for quantitative analysis of phases in cement powder and phases in mixed samples of cement and pure calcium hydroxide based on the TOPAS software ,the Rietveld analysis values were compared with thermal analysis val- ues and the actual preparation values.The results showed that,Rietveld analysis values showed good agreement with the actual preparation values of mixed samples, and the accuracy degree of Rietveld method was at least as well as that of TG/DSC method which was commonly used in quantitative analysis of calcium hydroxide.By adding appropriate internal standard substance, XRD-Rietveld method could be effectively use in quantitative analysis of sulfate attack products in cement-based materials.This work has practical significance on the study of sulfate attack of cement-based material.

关 键 词：XRD Rietveld法 水泥基材料 物相 定量分析 

分 类 号：TU528.01[建筑科学—建筑技术科学]