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Hydraulic Properties of Fluidized Bed Combustion Ashes

Published online by Cambridge University Press:  21 February 2011

I. Odler  and
K. -H. Zysk
I. Odler
Affiliation:
Technical University Clausthal, Institute of Nonmetallic Materials, Zehntnerstrasse 2A, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany
K. -H. Zysk
Affiliation:
Technical University Clausthal, Institute of Nonmetallic Materials, Zehntnerstrasse 2A, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany
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Abstract

Seven fluidized bed combustion ashes of different composition were studied as to their hydraulicity and pozzolanicity. Four of them exhibited hydraulic reactivity and hardened when mixed with water. All of them exhibited a positive effect on strength development if used as constituents of blended cements. However, the presence of significant amounts of Fe2+ and free lime in the ash, as well as excessive amounts of SO3 in the produced cement caused unsoundness associated with the decline of flexural strength after longer hydration times.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 178: Symposium W – Fly Ash and Coal Conversion By-Products VI , 1989 , 189
Copyright
Copyright © Materials Research Society 1990

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References

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