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Effect of micro-sized alumina powder on the hydration products of calcium aluminate cement at 40 °C.
- Source :
-
Ceramics International . Oct2016, Vol. 42 Issue 13, p14391-14394. 4p. - Publication Year :
- 2016
-
Abstract
- In this work, the effect of different micro-sized alumina powders on the hydration products of calcium aluminate cement (CAC) during hydration at 40 °C is studied. The cement hydration at the designated times is terminated by the freeze-vacuum method. The phase development and microstructure evolution during the cement hydration are investigated by XRD and DSC, and SEM, respectively. It is found that 3CaO·Al 2 O 3 ·6H 2 O (C 3 AH 6 ) is the dominant product of the pure CAC after hydration at 40 °C for 3.5 h. But 2CaO·Al 2 O 3 ·8H 2 O (C 2 AH 8 ) is the dominant hydrate and C 3 AH 6 is not found in the mixtures of CAC and micro-sized alumina powder under the same condition. The results indicate that the addition of alumina powders promotes the formation of C 2 AH 8 and retards the conversion of C 2 AH 8 to the C 3 AH 6 phase. Moreover, such phase development with alumina addition is discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ALUMINUM oxide
*METAL powders
*HYDRATION
*CALCIUM aluminate
*CEMENT
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 42
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 116864864
- Full Text :
- https://doi.org/10.1016/j.ceramint.2016.06.005