Identification of hydration stage of calcium sulfoaluminate cement at an early age with helium pycnometry
Identification of hydration stage of calcium sulfoaluminate cement at an early age with helium pycnometry
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氦比重法识别硫铝酸钙水泥早期水化阶段
DOI：
10.1617/s11527-017-1050-6
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发表时间：
2017-05
影响因子：
3.8
通讯作者：
Xiaoxing Jiang
中科院分区：
文献类型：
--
作者：
Xu Yang;Zhenping Sun;Haijing Yang;Yanliang Ji;Xiaoxing Jiang
采用氦比重法、放热试验、X射线衍射、热重/差示扫描量热法和扫描电镜等方法对硫铝酸钙水泥的早期水化阶段进行了研究。结果表明，CSA水泥的水化过程分为四个阶段：快速溶解阶段、溶解结晶阶段、晶体生长阶段和稳定阶段。在快速溶解阶段，放热润湿和快速水化导致收缩发生在0 - 15 min。在溶解-结晶阶段发生显著的体积减小。在晶体生长阶段，由于晶化压力和尺寸效应的共同作用，钙矾石倾向于在纳米尺度的孔隙附近结晶。在整个稳定阶段，体积增加显著减慢，表明CSA水泥水化的减速。此外，还研究了CSA水泥中熟料和石膏配比对其水化的影响。
This work is to study the mechanism of the hydration of calcium sulfoaluminate (CSA) cement at an early age by identifying the hydration stage with helium pycnometry, heat evolution test, X-ray diffraction, thermo-gravimetric/differential scanning calorimetry and scanning electron microscope. The results show that the hydration process of CSA cement has four stages: rapid dissolution stage, dissolution-crystallization stage, crystal growth stage and stable stage. In the rapid dissolution stage, exothermic wetting and fast hydration result in the shrinkage occurring from 0 to 15 min. A significant volume decrease happens in the dissolution-crystallization stage. In the crystal growth stage, ettringite prefers to crystalize at the neighboring places of pores at the nano scale due to the combined action of crystallization pressure and size effect. The volume increase considerably slows down throughout the stable stage indicating the deceleration of CSA cement hydration. In addition, the influence of the proportions of clinker and gypsum in the CSA cement on its hydration is studied as well.
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DOI：
--
发表时间：
2007
期刊：
MRS Proceedings
影响因子：
--
作者：
Marie-Louise Mateus;M. Rouvet;J. Gumy;R. Liardon
通讯作者：
Marie-Louise Mateus;M. Rouvet;J. Gumy;R. Liardon
影响因子：
7.4
作者：
Yang, Xu;Sun, Zhenping;Ji, Yanliang
通讯作者：
Ji, Yanliang
影响因子：
10.5
作者：
Trauchessec, R.;Mechling, J. -M.;Le Rolland, B.
通讯作者：
Le Rolland, B.
影响因子：
11.4
作者：
Chen, Irvin A.;Hargis, Craig W.;Juenger, Maria C. G.
通讯作者：
Juenger, Maria C. G.
影响因子：
10.5
作者：
Telesca, A.;Marroccoli, M.;Monteiro, P. J. M.
通讯作者：
Monteiro, P. J. M.