背散射电子图像分析法在水泥基材料孔结构研究中的应用
发布时间：2018-08-12 18:01
【摘要】：优化了背散射电子图像分析(BSE-IA)法在水泥基材料孔结构研究中孔隙阈值的确定方法,以降低主观因素影响,推导出统计所需图像最少张数的计算公式,分析了孔隙阈值确定方法和图像放大倍率对测试结果的影响,并将BSE-IA法与压汞法(MIP)测得的孔隙率结果进行对比.结果表明:选用灰度面积累计分布曲线的二次导数来确定水泥净浆孔隙阈值以及500倍背散射电子图像统计出的结果较为合理,工作量适中,而BSE-IA法较MIP法测得的孔隙率小,但BSE-IA法可以直接观察孔隙形态及分布,因此在表征水泥基材料孔结构方面具有独特优势.
[Abstract]:In order to reduce the influence of subjective factors, the method of determining the pore threshold in the study of the pore structure of cement based materials by BSE-IA method is optimized, and the formula for calculating the minimum number of images required for statistics is derived. The effect of pore threshold determination and image magnification on the test results was analyzed, and the porosity measured by BSE-IA method and mercury injection method (MIP) was compared. The results show that the second derivative of the cumulative distribution curve of gray area is used to determine the pore threshold of cement paste and the statistical results of 500 times backscatter electron image are reasonable, the workload is moderate, and the porosity measured by BSE-IA method is smaller than that by MIP method. However, BSE-IA method can directly observe the pore morphology and distribution, so it has a unique advantage in characterizing the pore structure of cement-based materials.
【作者单位】： 武汉理工大学硅酸盐建筑材料国家重点实验室;宁波市轨道交通工程建设指挥部;
【基金】：国家自然科学基金资助项目(51172173) “十二五”国家科技支撑计划项目(2014BAB15B01)
【分类号】：TU528
，
本文编号：2179856
[Abstract]:In order to reduce the influence of subjective factors, the method of determining the pore threshold in the study of the pore structure of cement based materials by BSE-IA method is optimized, and the formula for calculating the minimum number of images required for statistics is derived. The effect of pore threshold determination and image magnification on the test results was analyzed, and the porosity measured by BSE-IA method and mercury injection method (MIP) was compared. The results show that the second derivative of the cumulative distribution curve of gray area is used to determine the pore threshold of cement paste and the statistical results of 500 times backscatter electron image are reasonable, the workload is moderate, and the porosity measured by BSE-IA method is smaller than that by MIP method. However, BSE-IA method can directly observe the pore morphology and distribution, so it has a unique advantage in characterizing the pore structure of cement-based materials.
【作者单位】： 武汉理工大学硅酸盐建筑材料国家重点实验室;宁波市轨道交通工程建设指挥部;
【基金】：国家自然科学基金资助项目(51172173) “十二五”国家科技支撑计划项目(2014BAB15B01)
【分类号】：TU528
，
本文编号：2179856
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