Research Article
Mechanism on Activation of Coal Gangue Admixture
Table 4
Reagents used in the test.
| | Name | Chemical formula | Na2O/SiO2 | pH value (50 g/L, 25°C) | Purity (%) |
| | Calcium chloride | CaCl2 | — | 8.0–10.0 | ≥96.0 | | Sodium silicate | Na2O·nSiO2 | 1.03 ± 0.03 | 12–14 | ≥99.0 | | Sodium sulfate | Na2SO4 | — | 5.0–8.0 | ≥99.0 | | Calcium hydroxide | Ca(OH)2 | — | 11-12 | ≥95.0 |
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