A novel evidence for the formation of semi-permeable membrane surrounding the Portland cement particles during the induction period
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- 作者：Pengkun Hou (1) (3)
Deyu Kong (2) (3)
Shiho Kawashima (3)
Jueshi Qian (1)
David J. Corr (3)
Surendra P. Shah (3) - 关键词：Semi ; permeable membrane ; Cement hydration ; Induction period ; Endothermic peak
- 刊名：Journal of Thermal Analysis and Calorimetry
- 出版年：2013
- 出版时间：August 2013
- 年：2013
- 卷：113
- 期：2
- 页码：881-884
- 全文大小：323KB
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Deyu Kong (2) (3)
Shiho Kawashima (3)
Jueshi Qian (1)
David J. Corr (3)
Surendra P. Shah (3)
1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
3. The Center for Advanced Cement-Based Materials, Northwestern University, Evanston, IL, 60208, USA
2. College of Architecture & Civil Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
文摘
This letter presents strong novel evidence for the semi-permeable membrane surrounding Portland cement during the induction period. In the cement hydration, heat curve obtained through high-resolution differential scanning calorimetry under isothermal conditions, one main and some other smaller endothermic peaks were detected. These endothermic peaks are believed to be caused by the osmotic expansion that occurs after the semi-permeable membrane forms, not the precipitation of calcium hydroxide or the imbibition of water during the induction period.