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Modeling the Effects of Fly Ash Characteristics and Mixture Proportions on Strength and Durability of Concretes

Published online by Cambridge University Press:  25 February 2011

Elizabeth L. White ,
Della M. Roy  and
Philip D. Cady
Elizabeth L. White
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802 also affiliated with the Department of Civil Engineering also affiliated with Environmental Resources Research Institute
Della M. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802 also affiliated with the Department of Materials Science and Engineering
Philip D. Cady
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802 also affiliated with the Department of Civil Engineering
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Abstract

Factor analyses and cluster analyses were the modeling tools used to relate the chemical and physical characteristics of fly ash and cement to the strength, sulfate resistance, and freeze-thaw durability of fly ash-modified concrete. A Type I Portland cement was mixed with base load and upset load condition fly ashes from three different power plants in each of five regions in the United States. Based on the interactions between the reactive constittuents of the cement and fly ash, common factor loadings were identified. Cement loaded onto the early strength factor; fly ash loaded onto the later strength factor. In some subgroups the quantity of mixing liquid loaded separately as representative of the high water/cement ratio, which masked the reactive interactions between the fly ash and cement. In other subgroups the inter-relationships between sulfate resistance and strength with fly ash/cemment fineness, CaO content, and alkali content were represented in the factor analysis as well as in the numerical analysis models.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 86: Symposium N – Fly Ash and Coal Conversion By-Products III , 1986 , 251
Copyright
Copyright © Materials Research Society 1987

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References

REFERENCES

1. Gumtz, G., Perri, J.S., Roy, D.M., White, E.L. and Dunstan, E., Fly Ash Classification Project Final Report. Fly Ash Cement/Concrete Use Projects. EPRI Project RP 2422-10 (Electric Power Research Institute, Palo Alto, CA, 1986) 230 pp.Google Scholar
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