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Proceedings Paper

Sulfate deterioration of cement-based materials examined by x-ray microtomography
Author(s): Nikhila N. Naik; Kimberly E. Kurtis; Angus P. Wilkinson; Andrew C. Jupe; Stuart R. Stock
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Paper Abstract

Sulfate ions present in soil, groundwater, seawater, decaying organic matter, acid rain, and industrial effluent adversely affect the long-term durability of portland cement concrete, but lack of complete understanding of the nature and consequences of sulfate attack hamper our ability to accurately predict performance of concrete in sulfate-rich environments. One impediment to improved understanding of sulfate deterioration of cement-based materials has been the lack of appropriate non-destructive characterization techniques. Laboratory x-ray microtomography affords an opportunity to study in situ the evolution of physical manifestations of damage due to sulfate exposure. The influence of materials selection and mixture parameters -- including water-to-cement ratio, cement type, and presence or absence of aggregate, as well as the influence of sulfate exposure conditions, including sulfate and cation type (i.e., Na2SO4 and MgSO4) and concentration -- have been examined by microtomography to determine their influence on the rate and character of the sulfate-induced deterioration.

Paper Details

Date Published: 26 October 2004
PDF: 11 pages
Proc. SPIE 5535, Developments in X-Ray Tomography IV, (26 October 2004); doi: 10.1117/12.560429
Show Author Affiliations
Nikhila N. Naik, National Academy of Construction (India)
Kimberly E. Kurtis, Georgia Institute of Technology (United States)
Angus P. Wilkinson, Georgia Institute of Technology (United States)
Andrew C. Jupe, Georgia Institute of Technology (United States)
Stuart R. Stock, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 5535:
Developments in X-Ray Tomography IV
Ulrich Bonse, Editor(s)

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