Impacts of Curing Temperature on the Hydration of Slag-Calcium Sulfoaluminate Cement

被引：0
|
作者：
Xu L. [1 ,2 ]
Ouyang J. [1 ,2 ]
Yang K. [1 ,2 ]
Xu M. [3 ]
Zhou J. [3 ]
机构：
[1] Key Laboratory of Advanced Civil Engineering Materials Of Ministry Of Education, Shanghai
[2] School of Materials Science and Engineering, Tongji University, Shanghai
[3] School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 11期
关键词：
curing temperature; hydration mechanisms; pore structure; slag-calcium sulfoaluminate cement;
D O I：
10.11896/cldb.21100065
中图分类号：
学科分类号：
摘要：
The compressive strength development, hydration exothermic, drying shrinkage, hydration products and pore structure of slag⁃calcium sulfoaluminate cement at different temperature (5 ℃, 20 ℃ and 40 ℃) were investigated. The results indicate that, different from Portland cement, the hydration of slag⁃calcium sulfoaluminate cement accompanies with more ettringite at early hydration stage, but the cumulative heat is lower. Elevated curing temperature results in a higher mechanical strength, but the later compressive strength is significantly higher at 20 ℃, far exceeding that cured at other temperatures. Correspondingly, the cement paste exhibits the most significant shrinkage at 20 ℃, which results from the greater pore wall pressure generated by the evaporation of water from the small pores. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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