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![[Figure 10]](hi0085fig10mag.jpg)
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Figure 10
Two-dimensional TEDDI map of a selected 8 mm × 2.5 mm region just beneath the surface of an artificially weathered concrete block. The incident (100 µm × 100 µm), diffracted (40 µm × 100 µm) beams and detector 2θ angle (3°) result in a diffraction lozenge of area 100 × 100 µm in the plane of the two-dimensional map and length 2.7 mm in the direction perpendicular to the concrete surface. The traverse was performed in steps of 100 µm in both directions, thus giving rise to 2000 pixel maps. The three maps given indicate the presence of (a) aggregates (dolomite map), (b) inter-aggregate binding cement hydrate (calcium hydroxide), (c) the ettringite/thaumasite of interest, and how these phases are inter-related. |
![[Figure 10]](hi0085fig10.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
