 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 2]](hw5035fig2mag.jpg)
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Figure 2
Plot of H2O/Si against Ca/Si for C-S-H(I) preparations. The filled circles represent samples that were lightly dried (e.g. in flowing N2 at room temperature) and the unfilled circles represent samples that were more harshly dried, i.e. at around 383 K (or by using a method that is approximately equivalent) or more severely than that [e.g. at 509 K and p(H2O) = 6 mm]. In a few cases data points are in a category different to that reported because it seems likely that they were dried more or less aggressively. The data are from: Brunauer & Greenberg (1962  ); Cong & Kirkpatrick (1996); Copeland et al. (1967); El-Hemaly et al. (1978); Fujii & Kondo (1981); Gard et al. (1959); Renaudin, Russias, Leroux, Frizon & Cau-dit-Coumes (2009); Taylor (1950, 1953); Taylor & Howison (1956). Samples with Ca/Si > 1.5 often contained crystalline Ca(OH)2. The lower thick line represents equation (23) and the upper black line is the same with one additional water molecule per Si atom. The bold unfilled diamonds represent the model structures that are developed in this paper and the five grey diamonds represent the least hydrated versions of them (from left to right, the T∞, T11, T5, T3 and T2 structures). The long-dashed lines correspond to intermixture of T2(i = 0.5) with Ca(OH)2. The cross symbols are for C-S-H(II) (Gard & Taylor, 1976) with different degrees of drying. The crossed-square symbol is for an almost fully reacted bottle-hydrated C3S (Brunauer et al., 1958; Brunauer, 1962). |
![[Figure 2]](hw5035fig2.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
