Properties of Artificial Lightweight Aggregate by Using Magnetic Separated Bottom Ash from Coal Power Plant

Abstract:

This study was conducted to evaluate the feasibility of using bottom ash after magnetic separation and dredged soil from the coal power plants as raw materials for artificial lightweight aggregate (ALA). The dependence of composition and sintering temperature on physical properties of ALA was investigated. Fe compounds play an important role in the bloating reaction, thus specimens containing more ferrous materials such as Fe₃O₄ are more easily bloated. Both black core region and bloating phenomenon were increased with an increase in the contents of dredged soil. Specimens made use of MBA(Magnetic separated bottom ash which has magnetic components) showed lower bulk density than those of NMBA(non-magnetic separated bottom ash which has much less ferrous materials. It was confirmed that MBA could be used as an effective raw material for making ALA having low density because the ferrous components in it act as bloating agents.

• Periodical: Materials Science Forum (Volume 724)
• Pages: 103-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.724.103
• Online since: June 2012
• Authors: Yoo Taek Kim, Chang Sub Jang, Yun Jae Choi
• Keywords: Artificial Lightweight Aggregate, Bottom Ash, Dredged Soil, Ferrous Materials, Magnetic Separation

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