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http://dx.doi.org/10.4191/KCERS.2010.47.5.401

Synthesis of Pure and Porous CaO·Al2O3 Clinker by Burning of Hydrates  

Kim, Du-Hyouk (Department of Advanced Materials Engineering, Kyungnam University)
Song, Tae-Woong (Department of Advanced Materials Engineering, Kyungnam University)
Publication Information
Journal of the Korean Ceramic Society / v.47, no.5, 2010 , pp. 401-406 More about this Journal
Abstract
For the lower-temperature preparation of calcium monoaluminate(CA, C:CaO, A:$Al_2O_3$) clinker which is hard to synthesize purely within its melting point, an equimolar hydrate was obtained and then used as a starting raw material of clinker burning. The hydrate was prepared from a mixture of waste oyster shell and industrial aluminium hydroxide by heating to $1200^{\circ}C$, grinding and mixing with water. The hydrate was composed of amorphous aluminium hydroxide and $C_3AH_6$(H:$H_2O$) formed by resolution-precipitation mechanism of the system C-A-H. By heating the hydrate, nearly pure and porous calcium monoaluminate clinker was formed at $1400^{\circ}C$ which is fairly lower temperature than that of its melting point. The formation of calcium monoaluminate was performed mainly by the reaction between amorphous alumina and $C_{12}A_7$ caused by the decomposition of $C_3AH_6$. The immediate and earlier formation of $C_{12}A_7$ seemed to be accelerated by not only high surface area and instability of the thermally decomposed hydrate but also the catalytic effect of water decomposed from the hydrate. The final calcium monoaluminate clinker was very porous because of the influence of highly porous shape of the thermally decomposed hydrate.
Keywords
Calcium monoaluminate; Hydrate-burning method; Thermal decomposition of hydrate; Clinker burning; Pure and porous calcium monoaluminate clinker;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
Times Cited By SCOPUS : 0
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1 H. Y. Na and T. W. Song, "Formation Behavior of Microporous Ettringite Body by Hydration of Tricalciumaluminate Clinker and Gypsum(in Korean)," J. Kor. Ceram. Soc., 45 [11] 734-38 (2008).   과학기술학회마을   DOI
2 F. M. Lea, "The Chemistry of Cement and Concrete," pp. 204-17, Chemical Publishing Company, Inc., New York, 1971.
3 H. F. Taylor, "The Chemistry of Cement," pp. 55-59, Academic Press, London, 1964.
4 G. Y. Onoda and L. L. Hench, "Physical Characterization Terminology," In Ceramic Processing before Firing, pp. 35-37, John Wiley and Sons Inc., New York, 1978.
5 T. W. Song and K. S. Han, "Synthesis of $CA_2$-based Clinker by Hydration-Burning Method -I. Effects of Temperature on Synthesis(in Korean)," J. Kor. Ceram. Soc., 27 [2] 211-18 (1990).   과학기술학회마을
6 F. M. Lea, "The Chemistry of Cement and Concrete," pp. 498-502, Chemical Publishing Company, Inc., New York, 1971.
7 J. M. Rivas Mercury, A. H. De Aza, and P. Pena, "Synthesis of $CaAl_2O_4$ from Powder : Particle Size Effect," J. Eur. Ceram. Soc., 25 [14] 3269-79 (2005).   DOI
8 H. Ishida, K. Sasaki, and T. Mitsuda, "Low-Temperature Synthesis of $\beta-Ca_2SiO_4$ from Hillebrandite," J. Am. Ceram. Soc., 75 [9] 2427-32 (1992).   DOI
9 T. W. Song and K. S. Han, "Synthesis of $CA_2$-based Clinker by Hydration-Burning Method -II. Hydraulic Properties of the Clinker(in Korean)," J. Kor. Ceram. Soc., 27 [3] 383-88 (1990).   과학기술학회마을
10 T. W. Song and K. S. Han, "Synthesis of $CA_2$-based Clinker by Hydration-Burning Method -III. Study on the Microstructural Changes during Clinker Burning(in Korean)," J. Kor. Ceram. Soc., 28 [10] 751-56 (1991).   과학기술학회마을
11 T. K. Ki and T. W. Song, "Study on Synthesis of Tricalciumaluminate Clinker by Hydrate-burning Method(in Korean)," J. Kor. Ceram. Soc., 44 [9] 517-23 (2007).   과학기술학회마을   DOI