Table 3. Electron, mass densities and mass attenuation coefficients (μ) obtained by PXCT for the neat PC paste at five months of hydration; expected mass densities taken from the CIF files (Aranda, 2016 ▸) and expected μ (Henke et al., 1993 ▸) are also given.
| Phase | Electron density (e Å−3) average of ten values | Electron density (e Å−3) full volume† | Expected electron density (e Å−3) | Calculated density (g cm−3) | Expected density (g cm−3)‡ | Calculated μ (cm−1) (corrected)† | Expected μ (cm−1) |
|---|---|---|---|---|---|---|---|
| 1, AFt | 0.568 (4) | 0.55 | 0.56 | 1.80 (1) | 1.78 | 187 | 181.0 |
| 3, HD_C-S-H | 0.657 (7) | 0.64 | — | 2.11 (2) | — | 279 | — |
| 4, CH | 0.690 (6) | 0.67 | 0.69 | 2.23 (2) | 2.23 | 440 | 446.1 |
| 5, Fe-Al-Si-Hg | 0.766 (8) | 0.76 | — | 2.52 (3) | 3.09 | 350 | — |
| 8, C3S | 0.957 (11) | 0.92 | 0.95 | 3.18 (4) | 3.15 | 614 | 657.8 |
| 9, C2S | 0.999 (4) | 0.98 | 0.99 | 3.32 (1) | 3.30 | 646 | 637.3 |
| 10, MgO | 1.080 (10) | 1.05 | 1.07 | 3.58 (3) | 3.58 | 228 | 217.4 |
| 11, C4AF | 1.080 (10) | 1.05 | 1.10 | 3.66 (3) | 3.73 | 591 | 566.4 |
| Capillary | 0.675 (4) | — | 0.66 | 2.24 (1) | 2.20 | — | — |
†
Values obtained from the segmented components by Avizo software.
‡
The expected density values are determined from crystallographic data and so they are not available for nanocrystalline/amorphous components.