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Carbonation in Concrete Made of Blended Cements

Published online by Cambridge University Press:  25 February 2011

Magne Maage
Magne Maage*
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

Concrete with different strengths was produced using four types of cements, one ordinary Portland cement (OPC) and three blended cements with 10% pulverized fuel ash (pfa), 25% pfa, and 15% slag respectively. The pfa was added to the cement clinker during the end of the grinding process. The the slag was preground. Carbonation was tested using the phenolphtalein method. The concretes were exposed to four different climates: (1) 50% RH, 20 C and normal CO2 content (0.03%) of air; (2) 50% RH, 20 C and 0.1% CO2; (3) outside in the natural environment unsheltered from rain; (4) outside in the natural environment sheltered from rain. Curing time before exposure was varied. The preliminary results showed that concrete with blended cements carbonated somewhat faster than concrete with OPC. The influence of curing time before exposure and exposure condition was found to be evident but independent of the blend.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 65: Symposium T – Fly Ash and Coal Conversion By-Products II , 1985 , 193
Copyright
Copyright © Materials Research Society 1986

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References

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