压汞实验和误差分析  

Mercury Intrusion Porosimetry and error analysis

作　　者：汤永净[1,2] 汪鹏飞[1] 邵振东 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海仰韶古建筑保护科技发展有限公司,上海200333

出　　处：《实验技术与管理》2015年第5期50-54,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目资助(51278359);长江学者和创新团队发展计划资助项目(IRT1029)

摘　　要：压汞实验被越来越广泛的应用于测量各种多孔材料的孔隙特征,该孔隙特征值的精度取决于实验误差的控制。通过对压汞实验误差的实验验证和分析,确定了实验样品的科学处置方法,建立了实验样品合理尺寸的计算公式。同时,对产生压汞实验结果误差的诸多因素如注汞加载速度、材料压缩、退汞角的变化、麻皮效应、墨水瓶孔(Ink-bottle pore)逐一进行了分析,确定了各因素对实验结果的不同影响程度。结合实际案例,提出了减少压汞实验误差的具体措施,保证了压汞实验结果的精度。The Mercury Intrusion Porosimetry （MIP） has been widely used to estimate pore characteristics of porous materials and the errors when the experiment directly affects the accuracy of the material＇s characteristic values. First, the approaches of preparing the sample with scientific steps and reasonably sizing the sample are discussed. Then, this paper makes an analysis of many factors influencing the results＇ reliability like rate of pressure application, material compressibility, change of contact angle, surface cavity effect and ink- bottle pore, of which the influence extent is provided. Furthermore, with practical cases, some suggestions reducing the error and ensuring the accuracy of experimental results are proposed.

关 键 词：压汞法原理 误差控制 样品处置 样品尺寸 

分 类 号：TU502[建筑科学—建筑技术科学]