| Title | The Influence of Microsilica on the Hydration of Calcium Aluminate Cement |
| Thematic area | Monolithics for Various Applications |
| Presenter | Mrs. Yaxian Liu |
| Authors | Miss Yaxian Liu, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China Miss Xiaohui Fu, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China Mr. Xuekun Tian, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China Mr. Yang Zhang, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China Dr. Liugang Chen, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China Prof. Guotian Ye, Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou - China |
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Abstract
Many different sources of microsilica with varied compositions and properties are used in calcium aluminate cements (CAC)-containing castables in China and can have different effect on the hydration behavior of calcium aluminate cements (CAC). The electrical conductivity, PH value and impurity content of microsilica from four different sources were tested in this work. Then the influence of microsilica from the four sources on the hydration of CAC was investigated. The exothermic temperature development of cement pastes at various curing temperatures was monitored by semi-conductive measurement. The hydration process of cement pastes was halted by a freeze vacuum drying method to examine the evolution of phase composition and microstructure of hydrates with XRD and SEM, respectively. The setting time and demoulding strength of mortars were also tested at 20 °C. |
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