Shrinkage Characteristics and Microstructure of Portland and Calcium Sulfoaluminate Composite Cement [PC-CSA复合水泥收缩特性与微观结构] - 文章详情页

作者：

Cui, S. (Cui, S..) | Zheng, Y. (Zheng, Y..) | Wang, Z. (Wang, Z..) (学者：王湛) | Wang, Y. (Wang, Y..)

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Scopus PKU CSCD

摘要：

In　order　to　solve　the　problems　of　shrinkage　and　creep　in　concrete,　a　research　of　mechanism　and　impact　factors　of　chemical　shrinkage,　autogenous　shrinkage　and　drying　shrinkage　in　PC-CSA　composite　cement,　was　conducted　in　this　paper.　SEM　and　MIP　were　used　to　perform　the　properties　of　Portland　cement　and　calcium　sulfoaluminate　composite　cements.The　relationship　between　shrinkage　of　microstructure　and　strength,　and　the　effects　of　cement　phase　content　were　discussed　though　a　comparative　study　between　OPC　and　PC-CSA　composite　cement.　Results　show　that　chemical　shrinkage　can　be　changed　directly　by　adding　expansive　components.　The　effects　of　autogenous　shrinkage　are　bigger　than　that　of　drying　shrinkage.　There　is　a　new　method　to　testing　porosity　by　SEM.　The　critical　range　of　the　best　yield　of　unhydrated　cement　mineral　is　30%-45%　obtained　fromcomparing　the　results　of　MIP.　The　pore　structure　is　changed　and　micro-expansion　appears　by　adding　expansive　components　at　hydration　one　day.　It　is　consistent　with　the　actual　measurement　results　of　cement　volume　changes.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.

关键词：

Composite cement; Pore structure; Shrinkage characteristics; Volume stability

作者机构：

[ 1 ] [Cui, S.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Zheng, Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Wang, Z.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Wang, Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

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