氩离子抛光-扫描电子显微镜法在混凝土微观孔隙结构研究中的应用  

Application of argon ion polishing-scanning electron microscope in the study of concrete microscopic pore structure

作　　者：王涛 陈胜利 葛祥坤[1] WANG Tao;CHEN Shengli;GE Xiangkun(Beijing Research Institute of Uranium Geology,Beijing 100029,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High-speed Railway,Beijing 100081,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [3]高速铁路轨道技术国家重点实验室,北京100081

出　　处：《世界核地质科学》2025年第1期196-202,共7页World Nuclear Geoscience

基　　金：中国铁道科学研究院集团有限公司国家创新平台开放基金项目(编号:2022YJ119)资助。

摘　　要：微观孔隙结构对混凝土材料研究具有重要意义。传统的核磁共振法、压汞法、光学显微镜法、X射线断层扫描法(X-CT)和氮气吸附等孔隙结构测试法在孔隙形态、纳米级孔隙表征等方面还存在一定局限性。本研究提出采用氩离子抛光-扫描电子显微镜法研究混凝土中微观孔隙结构,制备具有高质量的无机械损伤表面的混凝土样品,定性研究混凝土中4种类型孔隙结构;采集大面积背散射电子图像,通过ImageJ、Avizo等软件定量分析混凝土中孔隙率、孔隙直径、孔隙形状因子和分级孔隙率等孔隙结构参数。该方法实现了对混凝土微观孔隙结构的定性分析和定量表征,对混凝土材料微观结构的研究分析具有参考意义。The microscopic pore structure is of great significance to the study of concrete materials.However,the traditional pore structure testing methods,such as nuclear magnetic resonance(NMR),mercury intrusion porosimetry(MIP),optical microscopy,X-ray tomography(X-CT),and nitrogen adsorption,still have some limitations in terms of pore morphology and nanoscale pore characterization.In this study,we proposed to use argon ion polishing-scanning electron microscopy method to study the microscopic pore structure in concrete,prepared concrete samples with high-quality mechanically damage-free surfaces,and qualitatively investigated four types of pore structure in concrete.Large-area backscattered electron images were collected,and the pore porosity,pore diameter,pore shape factor,and graded porosity of the pore structure were quantified by ImageJ,Avizo,and other software.This method achieves the qualitative analysis and quantitative characterization of concrete microporous structure,which is of reference significance for the research and analysis of the microstructure of concrete materials.

关 键 词：氩离子抛光 扫描电子显微镜 混凝土 微观孔隙结构 

分 类 号：P575.2[天文地球—矿物学]