Effects of Calcium Carbide Sludge on Properties of Steam Curing Brick Prepared by Extracted Aluminum Fly Ash

Abstract:

Because the fly ash will produce large amounts of the secondary waste emission after the extraction of aluminum, the utilization of the fly ash residue after the extraction of aluminum has great significance. The autoclaved fly ash bricks studied in this paper use CFB ash residue after extraction of aluminum as the main material, and calcium carbide clay which consists mainly of calcium hydroxide is the waste residua of the production of acetylene gas in the chemical plants. This paper analyzes the chemical composition, the mineral composition and the microstructure of the fly ash residue after extraction of aluminum. In the paper, we also study the law and impacts of compressive strength, flexural strength, frost resistance and water absorption, which are made by calcium carbide clay for the autoclaved fly ash bricks. Experimental results illustrate that calcium carbide clay can significantly improve the compressive strength, the flexural strength and the frost resistance of the coal fly ash autoclaved bricks, and significantly reduce its water absorption.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 1516-1519
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.1516
• Online since: May 2012
• Authors: Li Guang Xiao, Rui Bo Li, Shi Ting Zhang, Hong Liang Hu
• Keywords: Autoclaved Fly Ash Brick, Calcium Carbide Sludge, Extracted Aluminum Fly Ash, Property Analysis

References

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