Abstract
Concrete cores were obtained from houses in eastern Connecticut, USA, that had varying degrees of crumbling foundations and wall cracking. Electron backscatter diffraction (EBSD) was used simultaneously with energy dispersive X-ray spectroscopy to investigate the degradation of these samples. This combination allowed the precise correlation of elemental composition with mineral crystallography phase mapping. EBSD examination showed the presence of pyrrhotite, pyrite, and marcasite phases in some of the samples, whereas internal sulfate attack (ISA) is triggered by the release of sulfates through the oxidation of such iron sulfides. Secondary expansion products from ISA are associated with foundation cracking, wall bulging, and drastically decreased structural stability. The main contribution of this study is therefore an automated procedure for preparation of concrete samples and analysis of aggregates using EBSD.
Recommended Citation
R. S. Uwanyuze et al., "Preparation Of Concrete Specimen For Internal Sulfate Attack Analysis Using Electron Backscatter Diffraction," International Journal of Applied Ceramic Technology, vol. 19, no. 3, pp. 1195 - 1207, Wiley, May 2022.
The definitive version is available at https://doi.org/10.1111/ijac.13973
Department(s)
Materials Science and Engineering
Publication Status
Open Access
Keywords and Phrases
degradation; electron backscatter diffraction; internal sulfate attack; pyrrhotite; sample preparation
International Standard Serial Number (ISSN)
1744-7402; 1546-542X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Wiley, All rights reserved.
Publication Date
01 May 2022
Comments
University of Connecticut, Grant None