Effect of MgO on microstructure evolution and exothermic characteristics of tricalcium aluminate during hydration

被引：1
|
作者：
Li, Shuai [1 ]
Wei, Yaowu [1 ,2 ]
Li, Bingrong [1 ]
Wang, Xiujuan [1 ]
Chen, Junfeng [1 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
[2] 947 Heping Rd, Wuhan 430081, Hubei, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2024年 / 50卷 / 01期
关键词：
Tricalcium aluminate; Magnesium oxide; Microstructure evolution; Exothermic characteristics; CRYSTAL-STRUCTURE; CAO GRANULES; RESISTANCE; IMPROVEMENT; CARBONATION; AMMONIUM;
D O I：
10.1016/j.ceramint.2023.10.313
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The phase composition, microstructure, and hydration process of C3A with different MgO content were compared to elucidate the mechanism of hydration resistance of CaO improved by MgO-C3A solid solution. The process of hydration heat release was detected by isothermal calorimetry and the hydration products were analyzed by X-ray diffraction and scanning electron microscope. The results showed that the addition of MgO resulted in lattice distortion of C3A. In the middle and late stages of the hydration process, Mg(OH)2 and amorphous gel-like substances covered the surface of the unreacted C3A and reduced the hydration reaction rate. The addition of MgO effectively reduced the hydration activity of the MgO-C3A solid solution that indicated the addition of MgO can improve the hydration resistance of CaO materials.
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页码：2055 / 2061
页数：7
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