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Restricted Hydration of Mass-Cured Concrete Containing Fly Ash

Published online by Cambridge University Press:  25 February 2011

R. H. Mills  and
N. Buenfeld
R. H. Mills
Affiliation:
Department of Civil Engineering, University of Toronto, 35 St. George St., Toronto, Ontario, Canada M5S 1A4
N. Buenfeld
Affiliation:
Department of Civil Engineering, Imperial College, Imperial College Road, London, SW7 2BU, United Kingdom
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Abstract

Cement paste and concrete specimens containing three different mixtures of portland cement (PC) and high-lime fly ash (FA) were subjected to various curing conditions, and the strengths, non-evaporable water, and porosities were compared with control mixes containing portland cement only. Strength and porosity data indicated that the cementing action of the mixtures was, in all cases, inferior to portland cement. For each mixture the strength loss resulting from imperfect curing, i.e. sealed or exposed to 50% relative humidity, was greater than for portland cement. In the case of concrete drying from one surface, strength differences were found, but these were not as clearly defined as those obtained in the paste specimens.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 86: Symposium N – Fly Ash and Coal Conversion By-Products III , 1986 , 221
Copyright
Copyright © Materials Research Society 1987

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References

REFERENCES

1. ACI Committee 308–81, Standard Practice for Curing Concrete (ACI, Detroit, 1986).Google Scholar
2. Mills, R.H., in Blended Cements, STP 897, edited by Frohnsdorff, G. ASTM Special Technical Publication 897 (ASTM, Philadelphia, 1986) pp. 49–61.Google Scholar
3. Shalon, R. and Ravina, D., in International Symposium on Concrete and Reinforced Concrete in Hot Countries, Haifa (RILEM, 1960).Google Scholar
4. Mills, R.H., in Fly Ash and Coal Conversion By-Products: Characterization, Utilization and Disposal II, edited by McCarthy, G.J., Glasser, F.P. and Roy, D.M., Mat. Res. Soc. Symp. Proc. Vol.65, (Materials Research Society, Pittsburgh, 1986) pp. 207–217.Google Scholar