Table 2 Comparison of the alteration of G0.40Nd4C and ISG glasses in sodic solutions at 90 °C
From: Chemical durability of peraluminous glasses for nuclear waste conditioning
Glass | Si/Al molar ratio in the glass | pH | rRA (g m−2 d−1)a | Delay before resumption of alteration (d)b | [Al] – [Si] concentrations in solution during the plateau time period (mg L-1) | Si/Al molar ratio in solution | Observed secondary phases |
|---|---|---|---|---|---|---|---|
G0.40Nd4C | 1.52 | 11.5c | 1.0 | 10–14 | 334–538 | 1.54 | Na-P1 zeolites |
11.3d | 1.8 | 14–17 | 214–330 | 1.47 | Na-P1 / Na-P2 zeolites | ||
10.5d | 0.2 | 196–211 | 73–105 | 1.37 | Na-P1 zeolites | ||
9.5d | – | – | 19–26 | 1.32 | None | ||
7.92 | 11.3d | 1.4 | 1–2 | 62–971 | 15.87 | Na-P1 / Na-P2 zeolites, analcime and C-S-H | |
11.0d | 0.9 | 15–21 | 50–650 | 12.05 | Na-P1 / Na-P2 zeolites, analcime and C-S-H | ||
10.7d | 0.3 | 29–40 | 20–277 | 13.70 | Na-P1 zeolites and C-S-H | ||
10.4d | 0.02 | 86–119 | 11–147 | 12.84 | Na-P1 zeolites |
