Effect of curing temperature and relative humidity on the hydrates and porosity of calcium sulfoaluminate cement

被引：54
|
作者：
Li, Lin [1 ]
Wang, Ru [1 ,2 ]
Zhang, Shaokang [1 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
[2] Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 213卷
基金：
中国国家自然科学基金;
关键词：
Calcium sulfoaluminate cement; Curing conditions; Hydrates; Porosity; STABILITY; WATER; SULFATE; GYPSUM; ETTRINGITE; ANHYDRITE; KINETICS; IMPACT; PHASE;
D O I：
10.1016/j.conbuildmat.2019.04.044
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The main objective of this study was to investigate the effect of curing temperature and relatively humidity (RH) on the hydrates and porosity of calcium sulfoaluminate (CSA) cement pastes. A series of experiments including X-ray diffraction (XRD), thermogravimetric (TG) and mercury intrusion porosimetry (MIP) were performed. The results indicate that the formation of hydration products and pore characteristics of CSA cement are dependent on the curing conditions. The formation of ettringite is favor of curing with low temperature and high RH. The rate of formation of aluminum hydroxide (AH(3)) and monosulfoaluminate (Ms) is well promoted when curing temperature and RH are rising. The total porosity of CSA cement paste is gradually decreased by curing with low temperature and high RH. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：627 / 636
页数：10
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