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Iowa Affiliate Research: Rapid Diagnostic Tests for Evaluating the Air Void System of Fly Ash Concrete

Published online by Cambridge University Press:  25 February 2011

L. Zimmerman ,
T. Demirel ,
K. Bergeson  and
S. Schlorholtz
L. Zimmerman
Affiliation:
Midwest Fly Ash and Materials, Inc., P.O. Box 3551, Sioux City, IA 51102
T. Demirel
Affiliation:
Materials Analysis and Research Laboratory, Engineering Research Institute, Iowa State University, Ames, IA 50011
K. Bergeson
Affiliation:
Materials Analysis and Research Laboratory, Engineering Research Institute, Iowa State University, Ames, IA 50011
S. Schlorholtz
Affiliation:
Materials Analysis and Research Laboratory, Engineering Research Institute, Iowa State University, Ames, IA 50011
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Abstract

An on-going fly ash research program, funded by six Iowa power companies and their marketing representative has been established at Iowa State University. The broad objective of the affiliate program is to conduct basic research on Iowa fly ashes that can be directly applied to increasing their utilization in the construction industry. The first year goal is to evaluate the influence of various Iowa fly ashes on the air void system of concrete. Previous research at Iowa State University had indicated that fly ash may be influencing air void distribution in fly ash concrete, and hence durability. A variety of combinations of aggregates, fly ashes, cements and admixtures are being evaluated for compatibility in concrete. Rapid diagnostic tests are being developed, including (1) a modified Hallimond tube flotation test to evaluate physico-chemical compatibility of combinations, and (2) LeMont image analysis techniques to analyze the air void system. Procedures and preliminary results are presented and discussed.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 65: Symposium T – Fly Ash and Coal Conversion By-Products II , 1985 , 161
Copyright
Copyright © Materials Research Society 1986

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References

1. Pitt, J.M., Schlorholtz, S., Demirel, T., et al, Characterization of Fly Ash for Use in Concrete, Iowa Department of Transportation Research Project HR-225, 1984.Google Scholar
2. Fuerstonau, D.W., Metzger, D.H., and Seele, G.D., How to Use This Modified Hallimond Tube for Better Flotation Testing, Engineering and Mining Journal, 1957.Google Scholar