Browse > Article
http://dx.doi.org/10.4334/JKCI.2013.25.2.209

Study on Physical and Chemical Properties of CaO-Al2O3 System Melting Compound  

Lee, Keun-Jae (Tong Yang Cement R&D Center)
Koo, Ja-Sul (Tong Yang Cement R&D Center)
Kim, Jin-Man (Dept. of Architecture, Kongju National University)
Oh, Sang-Yoon (Ecomaister Co. Ltd.)
Publication Information
Journal of the Korea Concrete Institute / v.25, no.2, 2013 , pp. 209-215 More about this Journal
Abstract
This study is aimed to identify the method to use the CaO-$Al_2O_3$ system of rapidly cooled steel making slag (RCSS) as the environment-friendly inorganic accelerating agent by analyzing its physical and chemical properties. The fraction of rapidly cooled steel making slag is distinguished from its fibrous, and the contents of CaO and $Fe_2O_3$ are inversely proportional across different fractions. In addition, as the content of CaO decreased and the content of $Fe_2O_3$ increased, the loss ignition tended to become negative (-) and the density increased. The pore distribution by mercury intrusion porosimetry is very low as compared to the slowly cooled steel-making slag, which indicates that the internal defect and the microspore rate are remarkably lowered by the rapid cooling. To analyze the major minerals the rapidly cooled steel-making slag, XRD, f-CaO quantification and SEM-EDAX analysis have been performed. The results shows that f-CaO does not exist, and the components are mainly consisted of $C_{12}A_7$ and reactive ${\beta}-C_2S$.
Keywords
rapidly cooled steel making slag; $C_{12}A_7$; ${\beta}-C_2S$;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Moon, H. Y. and Yoo, J. H., "Utilization of Electric Arc Furnace Slag and Converter Slag after Aging for Concrete Aggregate," Journal of the Korea Concrete Institute, Vol. 14, No. 4, 2002, pp. 567-607.   과학기술학회마을   DOI   ScienceOn
2 Yoo, S. Y., Lee, K. J., Lee, S. L., Koo, J. S., and Kim, J. M., "A Fundamental Study on the Properties of CaO-$Al_{2}O_{3}$ Melt Blend according to Grinding Condition," Korea Recycled Construction Resource Institute, Vol. 12 No. 1, 2012, pp. 26-31.
3 Kim, J. M., Kim, J. H., Lee, M. J., Choi, S. M., and Oh, S. Y., "Physical Characteristics of Rapidly Cooled Ladle Furnace Slag as Inorganic Binder," Korea Recycled Construction Resource Institute, Vol. 11, No. 2, 2011, pp. 11-14.
4 Kwak, E. K., "Utilization of Rapidly Cooled Steel Slag as Fine Aggregate for Concrete," Doctoral Dissertations, Kongju University, 2011, pp. 16-29.
5 Takayama, S., Idemitsu, T., Adia, N., Sugi, M., and Tokuhara, H., "The Utilization of Steel Making Slag Improved by the Method of Steam Aging as Upper Base Materials," Japan Society of Civil Engineering, Vol. 32, 1996, pp. 177-186.
6 Tanaka, H., Yamada, S., Hasiba, M., and Ozeki, T., "Application of Steel Making Slag for Expansion Agent of Hybrid Composite Pile (鋼管複合パイル用膨脹材としての轉爐滓の活用)," Annual Meeting of JCA, Vol. 35, 1981, pp. 541-544.
7 Kim, J. M., Cho, S. H., Oh, S. Y., and Kwak, E. G., "Properties of Rapidly-Cooled Steel Slag by Atomizing Process," Magazine of the Korea Concrete Institute, Vol. 9, No. 6, 2007, pp. 39-45.   과학기술학회마을   DOI   ScienceOn
8 Reed, J. S., Principles of Ceramics Processing, Vol. 2, John Wiley and Sons, Inc, New York, 1995, pp. 101-105.
9 Yoo, S. Y., "Development of Superplasticizer Combined CASB and Performance Improvement of Ultra High Strength Concrete," Doctoral Dissertations, Chung-Ju University, 2011, pp. 52-62.