X-Ray Microtomography of an ASTM C109 Mortar Exposed to Sulfate Attack.
X-Ray Microtomography of an ASTM C109 Mortar Exposed to
Bentz, D. P.; Martys, N. S.; Stutzman, P. E.; Levenson,
M. S.; Garboczi, E. J.; Dunsmuir, J.; Schwartz, L. M.
Materials Research Society. Microstructure of
Cement-Based Systems/Bonding and Interfaces in
Cementitious Materials. Materials Research Society
Symposium Proceedings Volume 370. November 28-December
1, 1994, Boston, MA., Materials Research Society,
Pittsburgh, PA, Diamond, S.; Mindess, S.; Glasser, F.
P.; Roberts, L. W., Editor(s)(s), 77-82 pp, 1995.
building technology; microtomography; mortar; x ray
X-ray microtomography can be used to generate
three-dimensional 5123 images of random materials at a
resolution of a few micrometers per voxel. This
technique has been used to obtain an image of an ASTM
C109 mortar sample that had been exposed to a sodium
sulfate solution. The three-dimensional image clearly
shows sand grains, cement paste, air voids, cracks, and
needle-like crystals growing in the air voids. Volume
fractions of sand and cement paste determined from the
image agree well with the known quantitites.
Implications for the study of microstructure and
proposed uses of X-ray microtomography on cement-based
composites are discussed.