Spatially resolved energy dispersive x-ray diffraction (EDXRD) as a tool for nondestructively providing phase composition depth profiles on cement and other materials

Angus P. Wilkinson*, Andrew C. Jupe, Kimberly E. Kurtis, Nikhila N. Naik, Stuart R Stock, Peter L. Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The presence of sulfates in water or soils surrounding portland cement concrete structures leads to progressive degradation. Spatially resolved energy dispersive diffraction (EDXRD) in combination with computed microtomography (μCT) and mechanical measurements can provide the information needed to understand, in detail, the degradation mechanisms that are associated with sulfate attack and to validate accelerated test methods used to evaluate the sulfate resistance of cements. Highly penetrating, high-energy X-rays from synchrotron sources allow the use of EDXRD to nondestructively determine depth profiles for the crystalline phases in the cement paste specimens several millimeters below the sample surface. These depth profiles, and how they vary with sulfate exposure conditions and duration, can be correlated with mechanical changes and the crack patterns seen in the microtomographs. Spatially resolved EDXRD is in principle useful for phase composition mapping and depth profiling in a wide range of materials where the attenuation of high energy x-rays is not extreme. Suitable materials include many ceramic compositions.

Original languageEnglish (US)
Title of host publicationApplications of X-Rays in Mechanical Engineering 2004
PublisherAmerican Society of Mechanical Engineers
Pages49-52
Number of pages4
ISBN (Print)0791847241, 9780791847244
DOIs
StatePublished - Jan 1 2004
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE 2004 - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

Publication series

NameApplications of X-Rays in Mechanical Engineering 2004

Other

Other2004 ASME International Mechanical Engineering Congress and Exposition, IMECE 2004
CountryUnited States
CityAnaheim, CA
Period11/13/0411/19/04

Keywords

  • Cement
  • Composition depth profiles
  • Nondestructive testing
  • Sulfate attack
  • Synchrotron x-ray

ASJC Scopus subject areas

  • Engineering(all)

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