SEM-backscattered Electron Imaging and Image Processing for Evaluation of Unhydrated Cement Volume Fraction in Slag Blended Portland Cement Pastes  

作　　者：丰曙霞 王培铭 LIU Xianping 

机构地区：[1]Key Laboratory of Advanced Civil Engineering Materials,Education of Ministry,School of Materials Science and Engineering,Tongji University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第5期968-972,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Major State Basic Research Development Program of China(973 Program)(No.2009CB623104)

摘　　要：Proper parameters for image taking and minimum field number for image processing were investigated to evaluate volume fraction of unhydrated cement（UHC） in both neat cement paste and slag blended cement paste. Our research suggested that magnification 250x was sufficient for the two pastes, and accelerating voltage should be set as 15 kV and 20 kV for BSE image taking of neat cement paste and slag blended cement paste respectively; the minimum field number increased while the total imaging area stayed the same as the magnification increased within certain statistical bias.Proper parameters for image taking and minimum field number for image processing were investigated to evaluate volume fraction of unhydrated cement（UHC） in both neat cement paste and slag blended cement paste. Our research suggested that magnification 250x was sufficient for the two pastes, and accelerating voltage should be set as 15 kV and 20 kV for BSE image taking of neat cement paste and slag blended cement paste respectively; the minimum field number increased while the total imaging area stayed the same as the magnification increased within certain statistical bias.

关 键 词：accelerating voltage MAGNIFICATION grey level histogram statistical analysis total imaging area 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TU528[自动化与计算机技术—计算机科学与技术]