Research Article
Economic and Environmental Evaluation and Optimal Ratio of Natural and Recycled Aggregate Production
Table 6
The economic and environmental detailed results for the research scenarios.
| | Aggregate obtaining type | Processing step | Primary specific energy demand (kgoe/ton) | Specific CO2eq emission (kg CO2eq/ton) | Cost (USD/ton) |
| | Scenario 1 | Extraction & mining | 0.9267 | 2.8097 | 1.0008 | | Crushing & screening | 1.3761 | 1.6513 | 0.6976 | | Total | 2.3027 | 4.4609 | 1.6981 |
| | Scenario 2 | Extraction & mining | 0.0884 | 0.2680 | 0.1235 | | Crushing & screening | 0.8207 | 0.9848 | 0.5319 | | Total | 0.9091 | 1.2529 | 0.6555 |
| | Scenario 3 | Extraction & mining | 0.5075 | 1.5388 | 0.5620 | | Crushing & screening | 1.0984 | 1.3181 | 0.6148 | | Total | 1.6059 | 2.8569 | 1.1768 |
| | Saving percent (third scenario/first scenario) | 30% | 36% | 31% |
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