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Carbonation Effects in Hardened Fly Ash Cements

Published online by Cambridge University Press:  25 February 2011

Inger Meland
Inger Meland*
Affiliation:
Cement and Concrete Research Institute, The Foundation for Scientific and Industrial Research at the Norwegian Institute of Technology, N-7034 Trondheim-NTH, Norway
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Abstract

Carbonation in hardened pastes of fly ash cements, stored in a CO2 atmosphere and exposed to different relative humidities, has been investigated in order to study its effects upon different properties of cement pastes. Thermogravimetry (TG), x-ray diffractometry, SEM, and mercury porosimetry (MIP) have been used to characterize the carbonation phenomenon. The results indicate that different relative humidities in the storage chambers lead to carbonation of different solid phases in the hydrated pastes. This effect is discussed in terms of TG- and x-ray analysis. Changes in pore size distribution due to carbonation have been analyzed by MIP and SEM.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 65: Symposium T – Fly Ash and Coal Conversion By-Products II , 1985 , 199
Copyright
Copyright © Materials Research Society 1986

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References

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