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| Type | Carbon content | Q (kJ kg−1) | Utilization routes |
|---|---|---|---|
| IV | >20% | 6270–12 550 | Power generation, fuels |
| III | 6–20% | 2090–6270 | Building materials |
| II | 4–6% | <2090 | Cement filler, landfilling, paving, back filling |
| I | <4% | <2090 | Cement filler, landfilling, paving, back filling |
