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Figure 9
One-dimensional TEDDI analyses along (half) the length of a cement cylinder subjected to 60 min of exposure to supercritical carbon dioxide; in each case the exposed face is nearer the viewer. Before exposure the Ca(OH)2 content is high and the CaCO3 content is low down along the whole cylinder length [(a) with the bottom detector at a 2θ angle of 2.247°]; after exposure the Ca(OH)2 is reduced (b), with the greatest reduction at the exposed (near) end, in contrast to the CaCO3 which is concentrated most at the exposed end decreasing to the middle of the core [(c) with the middle detector at 2θ = 4.966°]. The appropriate EDD peaks for Ca(OH)2, CaCO3, ettringite (Ett), and brownmillerite (Bm) are indicated together with an, as yet, unidentified phase (*).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 7| Part 3| May 2000| Pages 167-177
doi:10.1107/S0909049500003137
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