Comparative Study of Reaction Degree of Mineral Admixture by Selective dissolution and Image Analysis
作者单位：清华大学土木工程系 北京科技大学土木与环境工程学院
会议名称：《中国硅酸盐学会水泥分会第六届学术年会》
会议日期：2016年
学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学]
关 键 词：slag fly ash reaction degree selective dissolution image analysis
摘 要：The reaction degrees of slag and fly ash in composite binder pastes were comparatively studied by selective dissolution and BSE image *** reaction degree of slag or fly ash determined by selective dissolutions higher than that by image analysis at early age,but the inverse regularity is observed at later *** the selective dissolution method is used,the reaction degrees of slag and fly ash may be over estimated at early age due to the loss of the superfine particles through the filtration and the partial dissolution of slag or fly ash,and underestimated at later age owing to the presence of cement and hydration *** narrow reacted slag rims formed at early age cannot be accurately identified during image analysis procedure,which leads to an underestimation of the reaction degree of *** to the destruction of fly ash particles during grinding or polishing process,the reaction degree of fly ash obtained by image analysis is *** later age,the small particles cannot be fully counted at low magnification and the outer part of particles cannot be calculated at high magnification,and thus high reaction degree may be *** image analysis could give more reliable results with acceptable error than selective dissolution.