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http://dx.doi.org/10.6111/JKCGCT.2012.22.3.158

Bloating mechanism of artificial lightweight aggregate with reject ash  

Lee, Ki-Gang (Department of Advanced Material Science and Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.22, no.3, 2012 , pp. 158-163 More about this Journal
Abstract
The purpose of this study is to improve recycling rate of the coal reject ash by investigating bloating mechanism for artificial lightweight aggregate of reject ash. In this study, we use reject ash (R/A) and dredged soil (D/S) as raw materials. The artificial lightweight aggregates were formed by plastic forming (${\phi}$ = 10 mm) and sintered by temperature raising method at different temperatures (between 1200 and $1275^{\circ}C$). The physical properties of the aggregates such as bulk specific gravity, adsorption and microstructure of surface and cross-section are investigated with the sintering temperature and rate of R/A-D/S contents. As the result of the bulk specific gravity graphs, we can found out the inflection point at content of R/A 80 wt.%. From the microstructure images, we considered the artificial lightweight aggregates content of R/A over 80 wt.% are distributed numerous uniform micro-pores by vitrification without Black Core and the artificial lightweight aggregates of R/A below 80wt.% are distributed macro-pores with Black Core.
Keywords
Reject ash; Bloating mechanism; Black core; Arrtificial lightweight aggregate; Dredged soil;
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Times Cited By KSCI : 5  (Citation Analysis)
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