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Mapping the Distribution of Corrosion Products in Cement Exposed to Sulfate using Energy Dispersive X-ray Diffraction

Published online by Cambridge University Press:  21 March 2011

Angus P. Wilkinson ,
Cora Lind ,
Stuart R. Stock ,
Kimberly E. Kurtis ,
Nikhila Naik ,
Dean R. Haeffner  and
Peter L. Lee
Angus P. Wilkinson
Affiliation:
School of Chemistry and Biochemistry Georgia Institute of Technology, Atlanta, GA 30332, USA
Cora Lind
Affiliation:
School of Chemistry and Biochemistry Georgia Institute of Technology, Atlanta, GA 30332, USA
Stuart R. Stock
Affiliation:
School of Materials Science and Engineering Georgia Institute of Technology, Atlanta, GA 30332, USA
Kimberly E. Kurtis
Affiliation:
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Nikhila Naik
Affiliation:
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Dean R. Haeffner
Affiliation:
SRI CAT, Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
Peter L. Lee
Affiliation:
SRI CAT, Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
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Abstract

The use of energy dispersive X-ray diffraction (EDXRD) to produce 1 D maps of the phases present inside both an alumina-aluminum test specimen and a 1.0 cm diameter cylinder of type I portland cement paste is discussed. The surface of the cement paste sample was found to be rich in calcium carbonate and deficient in portlandite relative to the bulk. After 7 days exposure to 1000 ppm Na2SO4 there was no evidence for the formation of a surface layer rich in crystalline sulfate containing phases. EDXRD appears to be a powerful tool for the study of sulfate attack on portland cements.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 678: Symposia EE – Applications of Synchrotron Radiation Techniques…IV , 2001 , EE5.3.1
Copyright
Copyright © Materials Research Society 2001

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