The Use of Anthracite Fly Ash for the Production of Autoclaved Aerated Concrete

Rostislav Drochytka; Vit Černý; Karel Kulísek

doi:10.4028/www.scientific.net/AMR.512-515.3003

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 512-515The Use of Anthracite Fly Ash for the Production...

The Use of Anthracite Fly Ash for the Production of Autoclaved Aerated Concrete

Abstract:

Burning high-quality anthracite coal produces ash with a high content of unburned residues, which in many cases permanently exceeds 20%. These ashes usually contain high levels of amorphous phase providing the pozzolanic activity, this making them particularly useful if potentially applied in the construction industry. Such potential of effective treatment necessitates reducing the content of unburned residues, the best level here being less than 4% w/w. This paper deals with the results of testing heat treatment of fly ashes particularly using the resources of eastern Slovakia. Tests have shown that tested process of heat treatment can safely reduce the content of unburned residues in fly ash whilst maintaining high levels of the glass phase. Raw materials thus modified meet the requirements for the use in cellular concrete production technology with beneficial use of exothermic reaction heat from fly ash treatment in pre-heating the autoclaves.

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Periodical:

Advanced Materials Research (Volumes 512-515)

Pages:

3003-3006

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.512-515.3003

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Online since:

May 2012

Authors:

Rostislav Drochytka, Vit Černý, Karel Kulísek

Keywords:

Ash, Autoclaved Aerated Concrete (AAC), Power Plant, Unburned Residues

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References

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