Browse > Article
http://dx.doi.org/10.4191/KCERS.2008.45.1.750

Effect of Shell Structure of Artificial Lightweight Aggregates on the Emission Rate of Absorbed Water  

Kang, Seung-Gu (Department of Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Ceramic Society / v.45, no.11, 2008 , pp. 750-754 More about this Journal
Abstract
The artificial aggregates with dense surface layer (shell) was fabricated and the dependence of water emission rate upon the shell structures was studied. The EAF dust containing many flux components and waste white clay with ignition loss of above 48% were used as for liquid phase and gas forming agents during a sintering process respectively. In addition, the shell structure was modified with various processes and the modification effect on water emission rate was analyzed. The pores under $10{\mu}m$ were found in the sintered artificial light aggregates and disappeared by incorporating to a bigger pore during re-sintering. The water emission rate in an initial step depended on a void content of aggregates filled in a bottle rather than a shell structure. But, after 7 days where the water emission of the aggregate with a shell is above 40%, the shell of aggregates suppressed the water emission. The core of aggregates was exposed and most shell was lost when crushed to smaller size so, the ability for suppressing water emission of the crushed aggregates decreased. The activation energy for the water emission was $3.46{\pm}0.25{\times}10^{-1}$J/mol for the most specimens showing that the activation energy is irrelevant to the pore size distribution and shell structure.
Keywords
Artificial lightweight aggregates; Shell; Emission rate; Pore distribution; Void content;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By SCOPUS : 1
연도 인용수 순위
1 H. J. Lee, Y. T. Kim, G. G. Lee, J. H. Kim, and S. G. Kang, "Properties of Artificial Aggregate for Orchid culture Fabricated from Solid Wastes," Mater. Sci. Forum., 544-545 601-4 (2007)
2 T. Y. Lo and H. Z. Cui, "Effect of Porous Lightweight Aggregate of Strength of Concrete," Mater. Lett., 58 [6] 916-19 (2004)   DOI   ScienceOn
3 T. Y. Lo, H. Z. Cui, and Z. G. Li, "Influence of Aggregate Pre-wetting and Fly ash on Mechanical Properties of Lightweight Concrete," J. Waste Management, 24 [4] 333-38 (2004)   DOI   ScienceOn
4 D. W. Kim, K. H. Cho, C. H. Park, H. Kang, I. S. So, and B. H. Kwack, "Effect of Substrates on the Growth of Cymbidium goeringii and Cymbidium 'Moon Venus' Seedlings," J. Kor. Soc. Hort. Sci., 38 749-53 (1997)
5 Y. J. Kwon, K. G. Lee, Y. T. Kim, Y. J. Kim, S. G. Kang, J. H. Kim, and M. S. Park, "Effect of Additives and Sintering Method on the Properties of Light Aggregate Prepared from EAF Dust/Clay," J. Kor. Ceram. Soc., 40 309-16 (2003)   DOI   ScienceOn
6 J. Park, Y. T. Kim, K. G. Lee, S. G. Kang, and J. H. Kim, "The Mechanism of Black core Formation," J. Kor. Cryst. Growh and Cryst. Tech., 15 [5] 208-15 (2005)   과학기술학회마을
7 J. O. Hong, S. G. Kang, K. G. Lee, Y. T. Kim, Y. J. Kim, J. H. Kim, and M. S. Park, "Characteristics of Sintered Bodies Made from the System of Paper Sludge Ash-Clay," J. Kor. Ceram. Soc., 38 908-13 (2001)   과학기술학회마을
8 K. S. Kim, S. G. Kang, K. G. Lee, Y. T. Kim, and J. H. Kim. "The Effect of $Al_2O_3$ upon Firing Range of clay-EAF dust system Body," J. Kor. Ceram. Soc., 40 494-500 (2003)   DOI   ScienceOn
9 Y. J. Kwon, Y. T. Kim, K. G. Lee, S. G. Kang, J. H. Kim, and M. S. Park, "Lightweight Aggregate Bloating Mechanism of Clay/Incinerated Ash/Additive System," J. Kor. Ceram. Soc., 38 811-16 (2001)
10 KS F 2505, Testing Method for the Unit Volume Weight and Void Content of Aggregates, Korean Standard Association, 2003
11 James S. Reed, Introduction to the Principles of Ceramic Processing, pp. 23-5, John Wiley & Sons, New York, 1989
12 C. K. Park, B. K. Kim, and K. H. Cho, "Utilization of Industrial By-products and Wastes for Manufacturing Hauyne Clinker and Properties of its Cement," J. Kor. Solid Wastes Eng. Soc., 15 191-95 (1998)