EFFECTS OF MODIFIED HIGH CALCIUM FLY ASH ON VOLUME STABILITY OF CEMENT-BASED MATERIALS

摘要：

In this paper,effects of modified high calcium fly ash(HF) on hydration heat andshrinkage deformation of cement-based materials are studied. By mercury intrusion method,the mechanism of HF on volume stability is disclosed. Results show: equivalent replacementof cement by HF can obviously reduce the pore radius,while the effect of reducing porosityratio is not obvious. The fining effect on pore radius distribution does not increase withincrement of addition,instead,there is an optimum range. The replacement can reducehydration temperature rising,this is advantageous to the massive volume concrete. Addingcertain addition of HF exerts compensation on shrinkage,especially in dry environment.

关键词： modified high calcium fly ash volume stability hydration heat

作者: PAN Wei WANG peiming MA Baoguo WEN Xiaodong

作者单位: Key Laboratory of advanced materials of Ministry of Education,Tongji University,Shanghai,200092,PR C Key Laboratory of advanced materials of Ministry of Education,Tongji University,Shanghai,200092,PR C Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan 430070,P Ningbo University of engineering,Ningbo,315021,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 570-574

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）