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Effect of Anthracite on Preparation of Ceramsite Using Red Mud

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Abstract:

Based on analyzing of chemical composition, mineral composition and thermal stability of red mud, preparation of ceramisite, using anthracite added as foaming agent, was investigated. Internal structure was observed by scanning electron microscopy (SEM). The results showed the bulk density of ceramisite was obviously reduced by anthracite added. The ceramisite with bulk density of 1.30g/cm3, water absorption rate£ ̈WAR£©of 2.98% and cylinder compressive strength £ ̈CCS£©of 9.48 MPa was obtained when weight ratio of red mud/waste glass/bentonites/anthracite was at 73:15:11:1. Majority of porosity in ceramisite was closed based on SEM. The porosity of ceramisite was much higher when anthracite was added as foaming agent than only calcite in red mud was used as foaming agent. The bulk density of the former was lower than that of the latter.

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Periodical:

Applied Mechanics and Materials (Volume 467)

Pages:

3-7

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.467.3

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Online since:

December 2013

Authors:

Hui Fen Yang*, Lin Fei Lu, Bei Ping Jiang, Jin Long Zhang

Keywords:

Anthracite, Calcite, Ceramisite, Foaming Agent, Red Mud

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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